diff --git a/02.recognize_digits/image/conv_layer.png b/02.recognize_digits/image/conv_layer.png
index 87b1f6b83bce654d3854231b80cd710cc7cd4753..c751892ba0be3ae803b5933c3f33487ecfb6fe7f 100644
Binary files a/02.recognize_digits/image/conv_layer.png and b/02.recognize_digits/image/conv_layer.png differ