OCR Image Color Editing
OCR works faster and more accurately when we read black text on a white background.
If we have, for example, blue text on a pink background, we will want to swap blue to black and pink to white before performing OCR.
This can be very time-consuming and slow using System.Drawing
, but it is completely automated with IronOCR.
The OcrInput.ReplaceColor
method allows us to replace one color with another in a document. This method is adaptive, allowing you to specify a percentage tolerance for a match to an exact RGB color. This removes the need to use Photoshop or ImageMagick scripts to prepare images for OCR.
ReplaceColor
Method Parameters
- The first parameter is the color to be replaced.
- The second parameter is the replacement color.
- The third optional parameter specifies tolerance for how closely the colors must match which allows for variations within the specified percentage.