diff --git a/main.py b/main.py
index fb51a09..3a810cf 100644
--- a/main.py
+++ b/main.py
@@ -173,28 +173,21 @@ i = dataStart
 for currentRow in tqdm(range(height), "读入像素点中"):
     currentCol = 0
     while (currentCol < width * (bpp // 8)):
+        index = dataStart + currentRow * rowLength + currentCol
         if (bpp == 32):
             pixels[currentRow].append({
-                'r':
-                imgBytes[dataStart + currentRow * rowLength + currentCol],
-                'g':
-                imgBytes[dataStart + currentRow * rowLength + currentCol + 1],
-                'b':
-                imgBytes[dataStart + currentRow * rowLength + currentCol + 2],
-                'a':
-                imgBytes[dataStart + currentRow * rowLength + currentCol + 3]
+                'r': imgBytes[index],
+                'g': imgBytes[index + 1],
+                'b': imgBytes[index + 2],
+                'a': imgBytes[index + 3]
             })
             currentCol += bpp // 8
         else:
             pixels[currentRow].append({
-                'r':
-                imgBytes[dataStart + currentRow * rowLength + currentCol],
-                'g':
-                imgBytes[dataStart + currentRow * rowLength + currentCol + 1],
-                'b':
-                imgBytes[dataStart + currentRow * rowLength + currentCol + 2],
-                'a':
-                0
+                'r': imgBytes[index],
+                'g': imgBytes[index + 1],
+                'b': imgBytes[index + 2],
+                'a': 0
             })
             currentCol += bpp // 8
 # 读入图片为像素数组完成