Update app.py

app.py

@@ -13,7 +13,7 @@ def imGreyAlpha(im):
     if isinstance(im,np.ndarray):
         im = Image.fromarray(im)
 
-    im = ImageOps.invert(im)
+    # im = ImageOps.invert(im)
     
     grey = im.convert('L') # 转成灰度
     px = grey.load() # 获取灰度数组
@@ -27,7 +27,10 @@ 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
-            draw.point((i, j), fill=(0, 0, 0, 255 - alpha)) # 填充像素点
+            if alpha == 0:
+                draw.point((i,j), fill=(0,0,0,0))
+            else:
+                draw.point((i, j), fill=(0, 0, 0, alpha)) # 填充像素点
 
     
     return im2 # 返回图像