Update app.py

app.py

@@ -27,12 +27,16 @@ def imGreyAlpha(im):
     for i in range(w):
         for j in range(h):
             alpha = px[i, j] # 获取灰度作为alpha值
-            if alpha == 0:
+            if alpha == 255:
                 draw.point((i,j), fill=(0,0,0,0))
             # elif alpha == 255:
             #      draw.point((i,j), fill=(0,0,0,255))
+            elif alpha <= 50:
+                draw.point((i,j), fill=(255,255,255,255))
             else:
-                draw.point((i, j), fill=(255, 255, 255, 255 -alpha)) # 填充像素点
+                pt = im.getpixel((i,j))
+                draw.point((i,j), fill=(pt[0] ,pt[1],pt[2],255-alpha))
+                # draw.point((i, j), fill=(255, 255, 255, 255 -alpha)) # 填充像素点
 
     
     return im2 # 返回图像