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This commit is contained in:
Henry Schimke
@@ -1,7 +1,666 @@
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mod MonochromeRectangleDetector;
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mod WhiteRectangleDetector;
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pub mod MathUtils;
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pub use MonochromeRectangleDetector::*;
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pub use WhiteRectangleDetector::*;
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/*
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* Copyright 2009 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//package com.google.zxing.common.detector;
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use crate::common::BitMatrix;
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use crate::{NotFoundException, RXingResultPoint};
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/**
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* <p>A somewhat generic detector that looks for a barcode-like rectangular region within an image.
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* It looks within a mostly white region of an image for a region of black and white, but mostly
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* black. It returns the four corners of the region, as best it can determine.</p>
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*
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* @author Sean Owen
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* @deprecated without replacement since 3.3.0
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*/
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const MAX_MODULES: i32 = 32;
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#[deprecated]
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pub struct MonochromeRectangleDetector {
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image: BitMatrix,
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}
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impl MonochromeRectangleDetector {
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pub fn new(image: &BitMatrix) -> Self {
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Self { image: image }
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}
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/**
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* <p>Detects a rectangular region of black and white -- mostly black -- with a region of mostly
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* white, in an image.</p>
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*
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* @return {@link RXingResultPoint}[] describing the corners of the rectangular region. The first and
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* last points are opposed on the diagonal, as are the second and third. The first point will be
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* the topmost point and the last, the bottommost. The second point will be leftmost and the
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* third, the rightmost
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* @throws NotFoundException if no Data Matrix Code can be found
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*/
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pub fn detect(&self) -> Result<Vec<RXingResultPoint>, NotFoundException> {
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let height = self.image.getHeight();
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let width = self.image.getWidth();
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let halfHeight = height / 2;
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let halfWidth = width / 2;
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let deltaY = 1.max(height / (MAX_MODULES * 8));
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let deltaX = 1.max(width / (MAX_MODULES * 8));
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let top = 0;
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let bottom = height;
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let left = 0;
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let right = width;
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let pointA = self.findCornerFromCenter(
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halfWidth,
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0,
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left,
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right,
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halfHeight,
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-deltaY,
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top,
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bottom,
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halfWidth / 2,
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)?;
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top = pointA.getY() - 1;
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let pointB = self.findCornerFromCenter(
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halfWidth,
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-deltaX,
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left,
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right,
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halfHeight,
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0,
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top,
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bottom,
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halfHeight / 2,
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)?;
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left = pointB.getX() - 1;
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let pointC = self.findCornerFromCenter(
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halfWidth,
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deltaX,
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left,
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right,
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halfHeight,
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0,
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top,
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bottom,
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halfHeight / 2,
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)?;
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right = pointC.getX() + 1;
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let pointD = self.findCornerFromCenter(
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halfWidth,
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0,
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left,
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right,
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halfHeight,
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deltaY,
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top,
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bottom,
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halfWidth / 2,
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)?;
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bottom = pointD.getY() + 1;
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// Go try to find point A again with better information -- might have been off at first.
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pointA = self.findCornerFromCenter(
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halfWidth,
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0,
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left,
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right,
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halfHeight,
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-deltaY,
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top,
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bottom,
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halfWidth / 4,
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)?;
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return Ok(vec![[pointA, pointB, pointC, pointD]]);
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}
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/**
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* Attempts to locate a corner of the barcode by scanning up, down, left or right from a center
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* point which should be within the barcode.
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*
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* @param centerX center's x component (horizontal)
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* @param deltaX same as deltaY but change in x per step instead
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* @param left minimum value of x
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* @param right maximum value of x
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* @param centerY center's y component (vertical)
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* @param deltaY change in y per step. If scanning up this is negative; down, positive;
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* left or right, 0
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* @param top minimum value of y to search through (meaningless when di == 0)
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* @param bottom maximum value of y
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* @param maxWhiteRun maximum run of white pixels that can still be considered to be within
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* the barcode
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* @return a {@link RXingResultPoint} encapsulating the corner that was found
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* @throws NotFoundException if such a point cannot be found
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*/
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fn findCornerFromCenter(
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&self,
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centerX: i32,
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deltaX: i32,
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left: i32,
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right: i32,
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centerY: i32,
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deltaY: i32,
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top: i32,
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bottom: i32,
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maxWhiteRun: i32,
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) -> Result<RXingResultPoint, NotFoundException> {
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let lastRange: Option<Vec<i32>> = None;
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let y: i32 = centerY;
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let x: i32 = centerX;
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while (y < bottom && y >= top && x < right && x >= left) {
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let range: Option<Vec<i32>>;
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if (deltaX == 0) {
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// horizontal slices, up and down
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range = self.blackWhiteRange(y, maxWhiteRun, left, right, true);
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} else {
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// vertical slices, left and right
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range = self.blackWhiteRange(x, maxWhiteRun, top, bottom, false);
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}
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if (range.is_none()) {
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if (lastRange.is_none()) {
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return Err(NotFoundException {});
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}
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// lastRange was found
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if (deltaX == 0) {
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let lastY = y - deltaY;
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if (lastRange?[0] < centerX) {
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if (lastRange?[1] > centerX) {
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// straddle, choose one or the other based on direction
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return RXingResultPoint::new(
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lastRange?[if deltaY > 0 { 0 } else { 1 }],
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lastY,
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);
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}
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return RXingResultPoint::new(lastRange?[0], lastY);
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} else {
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return RXingResultPoint::new(lastRange?[1], lastY);
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}
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} else {
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let lastX = x - deltaX;
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if (lastRange?[0] < centerY) {
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if (lastRange?[1] > centerY) {
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return RXingResultPoint::new(
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lastX,
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lastRange?[if deltaX < 0 { 0 } else { 1 }],
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);
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}
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return RXingResultPoint::new(lastX, lastRange?[0]);
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} else {
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return RXingResultPoint::new(lastX, lastRange?[1]);
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}
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}
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}
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lastRange = range;
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y += deltaY;
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x += deltaX
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}
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return Err(NotFoundException {});
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}
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/**
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* Computes the start and end of a region of pixels, either horizontally or vertically, that could
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* be part of a Data Matrix barcode.
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*
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* @param fixedDimension if scanning horizontally, this is the row (the fixed vertical location)
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* where we are scanning. If scanning vertically it's the column, the fixed horizontal location
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* @param maxWhiteRun largest run of white pixels that can still be considered part of the
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* barcode region
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* @param minDim minimum pixel location, horizontally or vertically, to consider
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* @param maxDim maximum pixel location, horizontally or vertically, to consider
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* @param horizontal if true, we're scanning left-right, instead of up-down
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* @return int[] with start and end of found range, or null if no such range is found
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* (e.g. only white was found)
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*/
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fn blackWhiteRange(
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&self,
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fixedDimension: i32,
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maxWhiteRun: i32,
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minDim: i32,
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maxDim: i32,
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horizontal: bool,
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) -> Option<Vec<i32>> {
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let center = (minDim + maxDim) / 2;
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// Scan left/up first
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let start = center;
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while (start >= minDim) {
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if (if horizontal {
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self.image.get(start, fixedDimension)
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} else {
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self.image.get(fixedDimension, start)
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}) {
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start = start - 1;
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} else {
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let whiteRunStart = start;
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start = start - 1;
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while start >= minDim
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&& !(if horizontal {
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self.image.get(start, fixedDimension)
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} else {
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self.image.get(fixedDimension, start)
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})
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{
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start = start - 1;
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}
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let whiteRunSize = whiteRunStart - start;
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if (start < minDim || whiteRunSize > maxWhiteRun) {
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start = whiteRunStart;
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break;
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}
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}
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}
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start = start + 1;
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// Then try right/down
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let end = center;
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while (end < maxDim) {
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if (if horizontal {
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self.image.get(end, fixedDimension)
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} else {
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self.image.get(fixedDimension, end)
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}) {
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end = end + 1;
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} else {
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let whiteRunStart = end;
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end = end + 1;
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while end < maxDim
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&& !(if horizontal {
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self.image.get(end, fixedDimension)
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} else {
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self.image.get(fixedDimension, end)
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})
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{
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end = end + 1;
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}
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let whiteRunSize = end - whiteRunStart;
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if (end >= maxDim || whiteRunSize > maxWhiteRun) {
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end = whiteRunStart;
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break;
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}
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}
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}
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end = end - 1;
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return if end > start {
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Some(vec![start, end])
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} else {
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None
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};
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}
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}
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/*
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* Copyright 2010 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
|
||||
*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
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//package com.google.zxing.common.detector;
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use crate::common::BitMatrix;
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use crate::{NotFoundException, RXingResultPoint};
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use super::MathUtils;
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|
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/**
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* <p>
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* Detects a candidate barcode-like rectangular region within an image. It
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* starts around the center of the image, increases the size of the candidate
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* region until it finds a white rectangular region. By keeping track of the
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* last black points it encountered, it determines the corners of the barcode.
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* </p>
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*
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* @author David Olivier
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*/
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const INIT_SIZE: i32 = 10;
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const CORR: i32 = 1;
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pub struct WhiteRectangleDetector {
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image: BitMatrix,
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height: i32,
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width: i32,
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leftInit: i32,
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rightInit: i32,
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downInit: i32,
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upInit: i32,
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}
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impl WhiteRectangleDetector {
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pub fn new_from_image(image: &BitMatrix) -> Result<Self, NotFoundException> {
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Self::new(
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image,
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INIT_SIZE,
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image.getWidth() / 2,
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image.getHeight() / 2,
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)
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}
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/**
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* @param image barcode image to find a rectangle in
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* @param initSize initial size of search area around center
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* @param x x position of search center
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* @param y y position of search center
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* @throws NotFoundException if image is too small to accommodate {@code initSize}
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*/
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pub fn new(
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image: &BitMatrix,
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initSize: i32,
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x: i32,
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y: i32,
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) -> Result<Self, NotFoundException> {
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let new_wrd: Self;
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new_wrd.image = image;
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new_wrd.height = image.getHeight();
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new_wrd.width = image.getWidth();
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let halfsize = initSize / 2;
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new_wrd.leftInit = x - halfsize;
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new_wrd.rightInit = x + halfsize;
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new_wrd.upInit = y - halfsize;
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new_wrd.downInit = y + halfsize;
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if (new_wrd.upInit < 0
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|| new_wrd.leftInit < 0
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|| new_wrd.downInit >= new_wrd.height
|
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|| new_wrd.rightInit >= new_wrd.width)
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{
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return Err(NotFoundException {});
|
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}
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|
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Ok(new_wrd)
|
||||
}
|
||||
|
||||
/**
|
||||
* <p>
|
||||
* Detects a candidate barcode-like rectangular region within an image. It
|
||||
* starts around the center of the image, increases the size of the candidate
|
||||
* region until it finds a white rectangular region.
|
||||
* </p>
|
||||
*
|
||||
* @return {@link RXingResultPoint}[] describing the corners of the rectangular
|
||||
* region. The first and last points are opposed on the diagonal, as
|
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* are the second and third. The first point will be the topmost
|
||||
* point and the last, the bottommost. The second point will be
|
||||
* leftmost and the third, the rightmost
|
||||
* @throws NotFoundException if no Data Matrix Code can be found
|
||||
*/
|
||||
pub fn detect(&self) -> Result<Vec<RXingResultPoint>, NotFoundException> {
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let left: i32 = self.leftInit;
|
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let right: i32 = self.rightInit;
|
||||
let up: i32 = self.upInit;
|
||||
let down: i32 = self.downInit;
|
||||
let sizeExceeded = false;
|
||||
let aBlackPointFoundOnBorder = true;
|
||||
|
||||
let atLeastOneBlackPointFoundOnRight = false;
|
||||
let atLeastOneBlackPointFoundOnBottom = false;
|
||||
let atLeastOneBlackPointFoundOnLeft = false;
|
||||
let atLeastOneBlackPointFoundOnTop = false;
|
||||
|
||||
while (aBlackPointFoundOnBorder) {
|
||||
aBlackPointFoundOnBorder = false;
|
||||
|
||||
// .....
|
||||
// . |
|
||||
// .....
|
||||
let rightBorderNotWhite = true;
|
||||
while ((rightBorderNotWhite || !atLeastOneBlackPointFoundOnRight) && right < self.width)
|
||||
{
|
||||
rightBorderNotWhite = self.containsBlackPoint(up, down, right, false);
|
||||
if (rightBorderNotWhite) {
|
||||
right += 1;
|
||||
aBlackPointFoundOnBorder = true;
|
||||
atLeastOneBlackPointFoundOnRight = true;
|
||||
} else if (!atLeastOneBlackPointFoundOnRight) {
|
||||
right += 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (right >= self.width) {
|
||||
sizeExceeded = true;
|
||||
break;
|
||||
}
|
||||
|
||||
// .....
|
||||
// . .
|
||||
// .___.
|
||||
let bottomBorderNotWhite = true;
|
||||
while ((bottomBorderNotWhite || !atLeastOneBlackPointFoundOnBottom)
|
||||
&& down < self.height)
|
||||
{
|
||||
bottomBorderNotWhite = self.containsBlackPoint(left, right, down, true);
|
||||
if (bottomBorderNotWhite) {
|
||||
down += 1;
|
||||
aBlackPointFoundOnBorder = true;
|
||||
atLeastOneBlackPointFoundOnBottom = true;
|
||||
} else if (!atLeastOneBlackPointFoundOnBottom) {
|
||||
down += 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (down >= self.height) {
|
||||
sizeExceeded = true;
|
||||
break;
|
||||
}
|
||||
|
||||
// .....
|
||||
// | .
|
||||
// .....
|
||||
let leftBorderNotWhite = true;
|
||||
while ((leftBorderNotWhite || !atLeastOneBlackPointFoundOnLeft) && left >= 0) {
|
||||
leftBorderNotWhite = self.containsBlackPoint(up, down, left, false);
|
||||
if (leftBorderNotWhite) {
|
||||
left -= 1;
|
||||
aBlackPointFoundOnBorder = true;
|
||||
atLeastOneBlackPointFoundOnLeft = true;
|
||||
} else if (!atLeastOneBlackPointFoundOnLeft) {
|
||||
left -= 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (left < 0) {
|
||||
sizeExceeded = true;
|
||||
break;
|
||||
}
|
||||
|
||||
// .___.
|
||||
// . .
|
||||
// .....
|
||||
let topBorderNotWhite = true;
|
||||
while ((topBorderNotWhite || !atLeastOneBlackPointFoundOnTop) && up >= 0) {
|
||||
topBorderNotWhite = self.containsBlackPoint(left, right, up, true);
|
||||
if (topBorderNotWhite) {
|
||||
up -= 1;
|
||||
aBlackPointFoundOnBorder = true;
|
||||
atLeastOneBlackPointFoundOnTop = true;
|
||||
} else if (!atLeastOneBlackPointFoundOnTop) {
|
||||
up -= 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (up < 0) {
|
||||
sizeExceeded = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (!sizeExceeded) {
|
||||
let maxSize = right - left;
|
||||
|
||||
let mut z: Option<RXingResultPoint> = None;
|
||||
let mut i = 1;
|
||||
while z.is_none() && i < maxSize {
|
||||
//for (int i = 1; z == null && i < maxSize; i++) {
|
||||
z = self.getBlackPointOnSegment(left, down - i, left + i, down);
|
||||
i += 1;
|
||||
}
|
||||
|
||||
if (z.is_none()) {
|
||||
return Err(NotFoundException {});
|
||||
}
|
||||
|
||||
let mut t: Option<RXingResultPoint> = None;
|
||||
//go down right
|
||||
let mut i = 1;
|
||||
while t.is_none() && i < maxSize {
|
||||
//for (int i = 1; t == null && i < maxSize; i++) {
|
||||
t = self.getBlackPointOnSegment(left, up + i, left + i, up);
|
||||
i += 1;
|
||||
}
|
||||
|
||||
if (t.is_none()) {
|
||||
return Err(NotFoundException {});
|
||||
}
|
||||
|
||||
let mut x: Option<RXingResultPoint> = None;
|
||||
//go down left
|
||||
let mut i = 1;
|
||||
while x.is_none() && i < maxSize {
|
||||
//for (int i = 1; x == null && i < maxSize; i++) {
|
||||
x = self.getBlackPointOnSegment(right, up + i, right - i, up);
|
||||
i += 1;
|
||||
}
|
||||
|
||||
if (x.is_none()) {
|
||||
return Err(NotFoundException {});
|
||||
}
|
||||
|
||||
let mut y: Option<RXingResultPoint> = None;
|
||||
//go up left
|
||||
let mut i = 1;
|
||||
while y.is_none() && i < maxSize {
|
||||
//for (int i = 1; y == null && i < maxSize; i++) {
|
||||
y = self.getBlackPointOnSegment(right, down - i, right - i, down);
|
||||
i += 1;
|
||||
}
|
||||
|
||||
if (y.is_none()) {
|
||||
return Err(NotFoundException {});
|
||||
}
|
||||
|
||||
return Ok(self.centerEdges(y.unwrap(), z.unwrap(), x.unwrap(), t.unwrap()));
|
||||
} else {
|
||||
return Err(NotFoundException {});
|
||||
}
|
||||
}
|
||||
|
||||
fn getBlackPointOnSegment(
|
||||
&self,
|
||||
aX: f32,
|
||||
aY: f32,
|
||||
bX: f32,
|
||||
bY: f32,
|
||||
) -> Option<RXingResultPoint> {
|
||||
let dist = MathUtils::round(MathUtils::distance_float(aX, aY, bX, bY));
|
||||
let xStep: f32 = (bX - aX) / dist.into();
|
||||
let yStep: f32 = (bY - aY) / dist.into();
|
||||
|
||||
for i in 0..dist {
|
||||
let x = MathUtils::round(aX + i.into() * xStep);
|
||||
let y = MathUtils::round(aY + i.into() * yStep);
|
||||
if (self.image.get(x, y)) {
|
||||
return RXingResultPoint::new(x, y);
|
||||
}
|
||||
}
|
||||
return None;
|
||||
}
|
||||
|
||||
/**
|
||||
* recenters the points of a constant distance towards the center
|
||||
*
|
||||
* @param y bottom most point
|
||||
* @param z left most point
|
||||
* @param x right most point
|
||||
* @param t top most point
|
||||
* @return {@link RXingResultPoint}[] describing the corners of the rectangular
|
||||
* region. The first and last points are opposed on the diagonal, as
|
||||
* are the second and third. The first point will be the topmost
|
||||
* point and the last, the bottommost. The second point will be
|
||||
* leftmost and the third, the rightmost
|
||||
*/
|
||||
fn centerEdges(
|
||||
&self,
|
||||
y: &RXingResultPoint,
|
||||
z: &RXingResultPoint,
|
||||
x: &RXingResultPoint,
|
||||
t: &RXingResultPoint,
|
||||
) -> Vec<RXingResultPoint> {
|
||||
//
|
||||
// t t
|
||||
// z x
|
||||
// x OR z
|
||||
// y y
|
||||
//
|
||||
|
||||
let yi = y.getX();
|
||||
let yj = y.getY();
|
||||
let zi = z.getX();
|
||||
let zj = z.getY();
|
||||
let xi = x.getX();
|
||||
let xj = x.getY();
|
||||
let ti = t.getX();
|
||||
let tj = t.getY();
|
||||
|
||||
if (yi < self.width.into() / 2.0f32) {
|
||||
return vec![
|
||||
RXingResultPoint::new(ti - CORR, tj + CORR),
|
||||
RXingResultPoint::new(zi + CORR, zj + CORR),
|
||||
RXingResultPoint::new(xi - CORR, xj - CORR),
|
||||
RXingResultPoint::new(yi + CORR, yj - CORR),
|
||||
];
|
||||
} else {
|
||||
return vec![
|
||||
RXingResultPoint::new(ti + CORR, tj + CORR),
|
||||
RXingResultPoint::new(zi + CORR, zj - CORR),
|
||||
RXingResultPoint::new(xi - CORR, xj + CORR),
|
||||
RXingResultPoint::new(yi - CORR, yj - CORR),
|
||||
];
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Determines whether a segment contains a black point
|
||||
*
|
||||
* @param a min value of the scanned coordinate
|
||||
* @param b max value of the scanned coordinate
|
||||
* @param fixed value of fixed coordinate
|
||||
* @param horizontal set to true if scan must be horizontal, false if vertical
|
||||
* @return true if a black point has been found, else false.
|
||||
*/
|
||||
fn containsBlackPoint(&self, a: i32, b: i32, fixed: i32, horizontal: bool) -> bool {
|
||||
if (horizontal) {
|
||||
for x in a..=b {
|
||||
if (self.image.get(x, fixed)) {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
for y in a..=b {
|
||||
if (self.image.get(fixed, y)) {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user