{"id":"image-threshold","engine":"media","category":"image","name":"画像の白黒二値化","fields":[{"key":"file","label":"ファイルを選択","type":"file","accept":"image/png,image/jpeg,image/webp,image/gif,image/bmp","multiple":false,"required":true},{"key":"threshold","label":"しきい値 (0–255)","type":"number","default":128,"min":0,"max":255,"step":1}],"sample":{}}