noun
drop-out color
In computing, a color that is ignored or not printed, often used in OCR or scanning contexts where a specific color is treated as transparent.
OCR処理では、ドロップアウトカラーを設定することで、罫線を無視して文字だけを読み取ることができます。
In OCR processing, by setting a drop-out color, you can ignore ruled lines and read only the characters.