diff --git a/src/common/otsu_level_binarizer.rs b/src/common/otsu_level_binarizer.rs
index 8a08af3..b6ac08c 100644
--- a/src/common/otsu_level_binarizer.rs
+++ b/src/common/otsu_level_binarizer.rs
@@ -37,7 +37,7 @@ impl OtsuLevelBinarizer {
         Self {
             width: source.getWidth(),
             height: source.getHeight(),
-            black_row_cache: vec![OnceCell::default(); source.getHeight() as usize],
+            black_row_cache: vec![OnceCell::default(); source.getHeight()],
             source,
             black_matrix: OnceCell::new(),
         }
diff --git a/src/luminance_source.rs b/src/luminance_source.rs
index 9ac2ffa..458a097 100644
--- a/src/luminance_source.rs
+++ b/src/luminance_source.rs
@@ -16,7 +16,7 @@
 
 //package com.google.zxing;
 
-use std::any::Any;
+
 
 use crate::Exceptions;