ImageEn for Delphi and C++ Builder ImageEn for Delphi and C++ Builder
ImageEn Forum
Profile    Join    Active Topics    Forum FAQ    Search this forumSearch
Forum membership is Free!  Click Join to sign-up
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 ImageEn Library for Delphi, C++ and .Net
 ImageEn and IEvolution Support Forum
 Old documents for black and white
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

AndNit

Brazil
2 Posts

Posted - Sep 30 2019 :  17:29:31  Show Profile  Reply
Hello, I've been trying to convert this image (and images with the same pattern, aged background (yellowish) and written letters) to black and white, but I have not been able to achieve good results ... I hope I can count on your help ...

The result usually blurs the letters and keeps a very large amount of black dots in the image.



original




How I would like it to be

xequte

4891 Posts

Posted - Sep 30 2019 :  20:29:30  Show Profile  Reply
Hi

Please try the TImageEnProc.DoPreviews method to see what gives the best results (You can see this in the demo ImageEditing\CompleteEditor\PhotoEn.dpr).

For example, this is -37 sat and +17 Lum in HSL adjustment.



Nigel
Xequte Software
www.imageen.com
Go to Top of Page

xequte

4891 Posts

Posted - Sep 30 2019 :  20:41:16  Show Profile  Reply
The difficulty is that the image has text coming through from the reverse of the page of the same shade as the text aliasing. That will be hard to eliminate.

What method did you use to get your desired output? You should be able to do the same in ImageEn.

Nigel
Xequte Software
www.imageen.com
Go to Top of Page

AndNit

Brazil
2 Posts

Posted - Oct 01 2019 :  16:16:00  Show Profile  Reply
Good afternoon, Thanks for the help. I came to the conclusion that black and white won't look nice with these very old images ... I started working with the grayscale option, before that I decrease the image saturation and move the balance of brightness and contrast. ..
Go to Top of Page

rmklever

Norway
42 Posts

Posted - Oct 19 2019 :  05:54:31  Show Profile  Reply
Hi AndNit,

You could also try using

ImageEnProc.AutoImageEnhance3(0.9, 0)

It gives a nice image





Roy M Klever
Klever on Delphi - www.rmklever.com
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To: