{"id":"image-channel-extractor","engine":"media","category":"image","name":"提取圖片顏色通道","fields":[{"key":"file","label":"選擇檔案","type":"file","accept":"image/png,image/jpeg,image/webp,image/gif,image/bmp","multiple":false,"required":true},{"key":"channel","label":"通道","type":"select","default":"0","options":[{"value":"0","label":"紅"},{"value":"1","label":"綠"},{"value":"2","label":"藍"},{"value":"3","label":"透明度"}]}],"sample":{}}