Can anyone help me out to explain how SubtractColor method of ImageDocument object works?

As we can provide arguments for Hue and Saturation, but what about the third parameter L luminous which is not defined, It works over HSL color model.

asked 23 May '14, 13:10

Nitya's gravatar image


This method is supposed for filtering static (for example red) text on different blanks, forms (i.e. passports) etc and saving grey/black color. The method changes the lightness (intensity) of the colorful background or text to remove it from the picture to increase the recognition quality. That is the reason why lightness is not passes as a parameter to the method.

If this method is not suitable for your purposes in this case, please, describe your scenario to search for the workaround.


answered 23 May '14, 17:00

SDK_support's gravatar image

SDK_support ♦♦

Your answer
toggle preview

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here



Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text]( "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported



Asked: 23 May '14, 13:10

Seen: 622 times

Last updated: 23 May '14, 17:00

© 2016 ABBYY. All rights Reserved. | Privacy Policy | Legal