Red Drop Out

[shoukz]

Loic,

Is there any way we can do the Red Drop out programmatically on the Image after it got scanned. RemoveRedComponent function is not working.

thanks,
Shoukat.

[Loïc]

Hi,

The RemoveRedComponent() method is not dedicated for that.

Please, attach an image on which you are trying to apply this correction. I'll see if we can do something.

Best regards,

Loïc

[shoukz]

Loic,

I do have only the real bills. Sorry I'm unable to attach those images as of now due to company policy. But it is a form wih the red fields. Values are in black.For better OCR we need to drop the red portion of the Form. When I was playing with the RGB to GRB(SwapColorsRGBtoGBR), the red portion of the form got turned into green. If I apply white color on the red portion of the form my purpose would be solved. Can you please let me know how to do that.

thanks,
Shoukat.

[Loïc]

Ok,

Could you try that:

Code: Select all

Call Imaging1.SwapColorEx(Imaging1.argb(255, 255, 0, 0), Imaging1.argb(255, 255, 255, 255), 90)

See: http://guides.gdpicture.com/v5/gdpictur ... lorEx.html

It should be good for you. You can decrease the threshold parameter in order to catch more color.

let me know about the result.

Loïc

[shoukz]

Loic,

No luck on that. I reduced the threshold to 40 and tried that also. Red stays there. I'm wondering how come it is replaced with the Green or blue with the SwapColorsRGBtoGBR method.

thanks,
Shoukat.

[Loïc]

Hi,

Could you attach just a portion of your image including a red part ?

Best regards,

Loïc

[bbanet]

I am trying to do the same thing, but the red is not really red, it is more some version of pink. I could get the exact color, but I would expect this to be pretty prone to error. Seems like the GetColorChannelFlagsK method gives me what I need, since the text is black over a red/pink background. Is this the proper use of this method?