Text in Tif files is "different" in 2.10

[wolfgrrl]

I've been using Gimp daily to edit tif files since 2012.

That being said, this version of Gimp is displaying them a little strangely. 

They look very "light" when I view them in Gimp. When I view them in any other program, they look as I expect them to. 

Also, when adding text to a tif file, it's going blurry on me and once the tif file is saved, it's more pixelated than it has been. They are also getting green and red halos around them. That's never happened either. See attached image. The top text is what I added today in 2.10. The bottom text is in version 2.8. 

I'm working with the same tif files I have for the last six years and the only thing that has changed is Gimp. 

Is there some setting I'm missing to bring back the darkness of the image and stop the text from blurring? I've been through many upgrades of Gimp and this has never happened before. 

Thank you!

[rich2005]

Cannot really help. Text without anti-aliasing. Can you post an example tiff?

The only thing I know for sure, is the slight difference in anti-aliasing between Gimp 2.10 default layer mode and the (as in Gimp 2.8) legacy layer mode.

example comparison: https://i.imgur.com/nOSK5f8.gif

[wolfgrrl]

(06-26-2018, 06:48 PM)rich2005 Wrote: Cannot really help. Text without anti-aliasing. Can you post an example tiff?

The only thing I know for sure, is the slight difference in anti-aliasing between Gimp 2.10 default layer mode and the (as in Gimp 2.8) legacy layer mode.

example comparison:  https://i.imgur.com/nOSK5f8.gif

I can't post a tif, unfortunately. They are copyrighted engineering drawings that I cannot distribute.

[rich2005]

That explains the text, probably came from a 1 bit (black and white) tiff possibly in fax format often used to transmit engineering drawings.

I can replicate the tif from an old drawing but the only thing I can suggest. When adding text, enable layer legacy mode and disable anti-aliasing in the text tools.

This using a typical AutoCad font. https://i.imgur.com/80QuWtG.jpg note it is in indexed colour mode

Next question. What format are you exporting the image in to get that fringing? Full details please not just jpg / png / tiff ... I have seen that effect before but I cannot remember where at the moment.

[Ofnuts]

(06-26-2018, 08:16 PM)rich2005 Wrote: That explains the text, probably came from a 1 bit (black and white) tiff possibly in fax format often used to transmit engineering drawings.

I can replicate the tif from an old drawing but the only thing I can suggest. When adding text, enable layer legacy mode and disable anti-aliasing in the text tools.

This using a typical AutoCad font.  https://i.imgur.com/80QuWtG.jpg note it is in indexed colour mode

Next question. What format are you exporting the image in to get that fringing? Full details please not just jpg / png / tiff ... I have seen that effect before but I cannot remember where at the moment.

Looks like sub-pixel rendering. There seems to be a fix at least on Linux:

https://askubuntu.com/questions/1049694/...untu-18-04

[wolfgrrl]

(06-26-2018, 08:16 PM)rich2005 Wrote: That explains the text, probably came from a 1 bit (black and white) tiff possibly in fax format often used to transmit engineering drawings.

I can replicate the tif from an old drawing but the only thing I can suggest. When adding text, enable layer legacy mode and disable anti-aliasing in the text tools.

This using a typical AutoCad font.  https://i.imgur.com/80QuWtG.jpg note it is in indexed colour mode

Next question. What format are you exporting the image in to get that fringing? Full details please not just jpg / png / tiff ... I have seen that effect before but I cannot remember where at the moment.

Actually, these were scanned with a large format professional scanner. These are B size and above technical drawings. And as previously stated, I've been working with these files for six years and never encountered this issue until I upgraded to 2.10.

I've already disabled anti-aliasing and that's not helping much. 

When I open the tif file and added text, that's how it looks when I'm editing it. This does not occur after export - it occurs while editing. 

The tifs are indexed, LZW saved in 1bit B&W mode. I've been using these settings from the get-go. 

But again, nothing has changed on my end with the exception of upgrading to 2.10.

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(06-26-2018, 09:50 PM)Ofnuts Wrote:

(06-26-2018, 08:16 PM)rich2005 Wrote: That explains the text, probably came from a 1 bit (black and white) tiff possibly in fax format often used to transmit engineering drawings.

I can replicate the tif from an old drawing but the only thing I can suggest. When adding text, enable layer legacy mode and disable anti-aliasing in the text tools.

This using a typical AutoCad font.  https://i.imgur.com/80QuWtG.jpg note it is in indexed colour mode

Next question. What format are you exporting the image in to get that fringing? Full details please not just jpg / png / tiff ... I have seen that effect before but I cannot remember where at the moment.

Looks like sub-pixel rendering. There seems to be a fix at least on Linux:

https://askubuntu.com/questions/1049694/...untu-18-04

I did see that and added it to my fonts.conf file. We'll see what happens.