ak/rxing
1
0
Fork 0
mirror of https://github.com/starovoid/rxing.git synced 2026-07-26 04:12:34 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add image BufferedImageLS

Browse Source
This commit is contained in:
Henry Schimke
2022-08-31 15:57:34 -05:00
parent 35b9d7bd8b
commit 94d6754c46
4 changed files with 213 additions and 184 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
Cargo.toml
View File

@@ -8,4 +8,10 @@ edition = "2021"
[dependencies]
regex = "1"
encoding = "0.2"
rand = "0.8.5"
rand = "0.8.5"
image = {version = "0.24.3", optional = true}
imageproc = {version = "0.23.0", optional = true}
[features]
default = ["image"]
image = ["dep:image", "dep:imageproc"]

183
src/BufferedImageLuminanceSource.java
View File

@@ -1,183 +0,0 @@
/*
* Copyright 2009 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* 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.
*/
package com.google.zxing;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.awt.image.WritableRaster;
/**
* This LuminanceSource implementation is meant for J2SE clients and our blackbox unit tests.
*
* @author dswitkin@google.com (Daniel Switkin)
* @author Sean Owen
* @author code@elektrowolle.de (Wolfgang Jung)
*/
public final class BufferedImageLuminanceSource extends LuminanceSource {
private static final double MINUS_45_IN_RADIANS = -0.7853981633974483; // Math.toRadians(-45.0)
private final BufferedImage image;
private final int left;
private final int top;
public BufferedImageLuminanceSource(BufferedImage image) {
this(image, 0, 0, image.getWidth(), image.getHeight());
}
public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {
super(width, height);
if (image.getType() == BufferedImage.TYPE_BYTE_GRAY) {
this.image = image;
} else {
int sourceWidth = image.getWidth();
int sourceHeight = image.getHeight();
if (left + width > sourceWidth || top + height > sourceHeight) {
throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
}
this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);
WritableRaster raster = this.image.getRaster();
int[] buffer = new int[width];
for (int y = top; y < top + height; y++) {
image.getRGB(left, y, width, 1, buffer, 0, sourceWidth);
for (int x = 0; x < width; x++) {
int pixel = buffer[x];
// The color of fully-transparent pixels is irrelevant. They are often, technically, fully-transparent
// black (0 alpha, and then 0 RGB). They are often used, of course as the "white" area in a
// barcode image. Force any such pixel to be white:
if ((pixel & 0xFF000000) == 0) {
// white, so we know its luminance is 255
buffer[x] = 0xFF;
} else {
// .299R + 0.587G + 0.114B (YUV/YIQ for PAL and NTSC),
// (306*R) >> 10 is approximately equal to R*0.299, and so on.
// 0x200 >> 10 is 0.5, it implements rounding.
buffer[x] =
(306 * ((pixel >> 16) & 0xFF) +
601 * ((pixel >> 8) & 0xFF) +
117 * (pixel & 0xFF) +
0x200) >> 10;
}
}
raster.setPixels(left, y, width, 1, buffer);
}
}
this.left = left;
this.top = top;
}
@Override
public byte[] getRow(int y, byte[] row) {
if (y < 0 || y >= getHeight()) {
throw new IllegalArgumentException("Requested row is outside the image: " + y);
}
int width = getWidth();
if (row == null || row.length < width) {
row = new byte[width];
}
// The underlying raster of image consists of bytes with the luminance values
image.getRaster().getDataElements(left, top + y, width, 1, row);
return row;
}
@Override
public byte[] getMatrix() {
int width = getWidth();
int height = getHeight();
int area = width * height;
byte[] matrix = new byte[area];
// The underlying raster of image consists of area bytes with the luminance values
image.getRaster().getDataElements(left, top, width, height, matrix);
return matrix;
}
@Override
public boolean isCropSupported() {
return true;
}
@Override
public LuminanceSource crop(int left, int top, int width, int height) {
return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
}
/**
* This is always true, since the image is a gray-scale image.
*
* @return true
*/
@Override
public boolean isRotateSupported() {
return true;
}
@Override
public LuminanceSource rotateCounterClockwise() {
int sourceWidth = image.getWidth();
int sourceHeight = image.getHeight();
// Rotate 90 degrees counterclockwise.
AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);
// Note width/height are flipped since we are rotating 90 degrees.
BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
// Draw the original image into rotated, via transformation
Graphics2D g = rotatedImage.createGraphics();
g.drawImage(image, transform, null);
g.dispose();
// Maintain the cropped region, but rotate it too.
int width = getWidth();
return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);
}
@Override
public LuminanceSource rotateCounterClockwise45() {
int width = getWidth();
int height = getHeight();
int oldCenterX = left + width / 2;
int oldCenterY = top + height / 2;
// Rotate 45 degrees counterclockwise.
AffineTransform transform = AffineTransform.getRotateInstance(MINUS_45_IN_RADIANS, oldCenterX, oldCenterY);
int sourceDimension = Math.max(image.getWidth(), image.getHeight());
BufferedImage rotatedImage = new BufferedImage(sourceDimension, sourceDimension, BufferedImage.TYPE_BYTE_GRAY);
// Draw the original image into rotated, via transformation
Graphics2D g = rotatedImage.createGraphics();
g.drawImage(image, transform, null);
g.dispose();
int halfDimension = Math.max(width, height) / 2;
int newLeft = Math.max(0, oldCenterX - halfDimension);
int newTop = Math.max(0, oldCenterY - halfDimension);
int newRight = Math.min(sourceDimension - 1, oldCenterX + halfDimension);
int newBottom = Math.min(sourceDimension - 1, oldCenterY + halfDimension);
return new BufferedImageLuminanceSource(rotatedImage, newLeft, newTop, newRight - newLeft, newBottom - newTop);
}
}

200
src/BufferedImageLuminanceSource.rs Normal file
View File

@@ -0,0 +1,200 @@
/*
* Copyright 2009 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* 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.
*/
// package com.google.zxing;
// import java.awt.Graphics2D;
// import java.awt.geom.AffineTransform;
// import java.awt.image.BufferedImage;
// import java.awt.image.WritableRaster;
use image::{DynamicImage, Luma};
use imageproc::geometric_transformations::rotate_about_center;
use crate::LuminanceSource;
static MINUS_45_IN_RADIANS: f32 = -0.7853981633974483; // Math.toRadians(-45.0)
/**
* This LuminanceSource implementation is meant for J2SE clients and our blackbox unit tests.
*
* @author dswitkin@google.com (Daniel Switkin)
* @author Sean Owen
* @author code@elektrowolle.de (Wolfgang Jung)
*/
pub struct BufferedImageLuminanceSource {
// extends LuminanceSource {
image: DynamicImage,
width: usize,
height: usize,
left: u32,
top: u32,
}
impl BufferedImageLuminanceSource {
pub fn new(image: DynamicImage) -> Self {
let w = image.width();
let h = image.height();
Self::with_details(image, 0, 0, w as usize, h as usize)
}
pub fn with_details(
image: DynamicImage,
left: u32,
top: u32,
width: usize,
height: usize,
) -> Self {
// if image.getType() == BufferedImage.TYPE_BYTE_GRAY {
// this.image = image;
// } else {
// int sourceWidth = image.getWidth();
// int sourceHeight = image.getHeight();
// if (left + width > sourceWidth || top + height > sourceHeight) {
// throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
// }
// this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);
// WritableRaster raster = this.image.getRaster();
// int[] buffer = new int[width];
// for (int y = top; y < top + height; y++) {
// image.getRGB(left, y, width, 1, buffer, 0, sourceWidth);
// for (int x = 0; x < width; x++) {
// int pixel = buffer[x];
// // The color of fully-transparent pixels is irrelevant. They are often, technically, fully-transparent
// // black (0 alpha, and then 0 RGB). They are often used, of course as the "white" area in a
// // barcode image. Force any such pixel to be white:
// if ((pixel & 0xFF000000) == 0) {
// // white, so we know its luminance is 255
// buffer[x] = 0xFF;
// } else {
// // .299R + 0.587G + 0.114B (YUV/YIQ for PAL and NTSC),
// // (306*R) >> 10 is approximately equal to R*0.299, and so on.
// // 0x200 >> 10 is 0.5, it implements rounding.
// buffer[x] =
// (306 * ((pixel >> 16) & 0xFF) +
// 601 * ((pixel >> 8) & 0xFF) +
// 117 * (pixel & 0xFF) +
// 0x200) >> 10;
// }
// }
// raster.setPixels(left, y, width, 1, buffer);
// }
// }
Self {
image: image,
width: width,
height: height,
left: left,
top: top,
}
}
}
impl LuminanceSource for BufferedImageLuminanceSource {
fn getRow(&self, y: usize, row: &Vec<u8>) -> Vec<u8> {
let width = self.getWidth();
let mut row = if row.len() >= width {
row.to_vec()
} else {
vec![0; width]
};
let pixels: Vec<u8> = self
.image
.clone()
.into_luma8()
.rows()
.nth(y)
.unwrap()
.map(|&p| p.0[0])
.collect();
// The underlying raster of image consists of bytes with the luminance values
row[..width].clone_from_slice(&pixels[..]);
return row;
}
fn getMatrix(&self) -> Vec<u8> {
return self.image.as_bytes().to_vec();
}
fn getWidth(&self) -> usize {
self.width
}
fn getHeight(&self) -> usize {
self.height
}
fn invert(&mut self) {
self.image.invert();
}
fn isCropSupported(&self) -> bool {
return true;
}
fn crop(
&self,
left: usize,
top: usize,
width: usize,
height: usize,
) -> Result<Box<dyn LuminanceSource>, crate::exceptions::Exceptions> {
return Ok(Box::new(BufferedImageLuminanceSource::with_details(
self.image
.crop_imm(left as u32, top as u32, width as u32, height as u32),
self.left + left as u32,
self.top + top as u32,
width,
height,
)));
}
fn isRotateSupported(&self) -> bool {
return true;
}
fn rotateCounterClockwise(
&self,
) -> Result<Box<dyn LuminanceSource>, crate::exceptions::Exceptions> {
Ok(Box::new(BufferedImageLuminanceSource::new(
self.image.rotate270(),
)))
}
fn rotateCounterClockwise45(
&self,
) -> Result<Box<dyn LuminanceSource>, crate::exceptions::Exceptions> {
let img = rotate_about_center(
&self.image.to_luma8(),
MINUS_45_IN_RADIANS,
imageproc::geometric_transformations::Interpolation::Bicubic,
Luma([0; 1]),
);
let new_img = DynamicImage::from(img);
Ok(Box::new(BufferedImageLuminanceSource::new(new_img)))
}
}

6
src/lib.rs
View File

@@ -1,6 +1,12 @@
mod common;
mod exceptions;
#[cfg(feature="image")]
mod BufferedImageLuminanceSource;
#[cfg(feature="image")]
pub use BufferedImageLuminanceSource::*;
use crate::common::{BitArray, BitMatrix};
use exceptions::*;
use std::any::{Any, TypeId};