过滤掉源图像中亮度大于滑块位置的像素

[{"title":"（ 4 个子文件 138KB ） 过滤掉源图像中亮度大于滑块位置的像素","children":[{"title":"test17","children":[{"title":"2.jpg <span style='color:#111;'> 26.95KB </span>","children":null,"spread":false},{"title":"1.jpg <span style='color:#111;'> 84.34KB </span>","children":null,"spread":false},{"title":"test17.exe <span style='color:#111;'> 71.58KB </span>","children":null,"spread":false},{"title":"test17.cpp <span style='color:#111;'> 872B </span>","children":null,"spread":false}],"spread":true}],"spread":true}]