{"id":"image-channel-extractor","engine":"media","category":"image","name":"Extrair canal de cor","fields":[{"key":"file","label":"Escolher ficheiro","type":"file","accept":"image/png,image/jpeg,image/webp,image/gif,image/bmp","multiple":false,"required":true},{"key":"channel","label":"Canal","type":"select","default":"0","options":[{"value":"0","label":"Vermelho"},{"value":"1","label":"Verde"},{"value":"2","label":"Azul"},{"value":"3","label":"Alfa"}]}],"sample":{}}