saving jpeg : green or blue on red lines problem

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Alain
Posts: 237
Joined: 28 Nov 06 21:30
Location: Aartselaar,Vlaanderen

saving jpeg : green or blue on red lines problem

Post by Alain » 03 Feb 14 21:30

Hi

I have a strange artefact when saving jpeg files. Diagonal green or blue lines on a red background or not rendered ok. See the included file and compare the green on red versus the green on white or white on red.

I have this a lot when making images for the web (800 pix) even with a quality of 96 and unfortunately this are two times sponsor logo's...

If I let IdImager saves as a tif and then use pwp to save a jpeg it's ok.

Is there a setting inside IdImager to solve it?


Alain
Attachments
logo_tumb.jpg
example
logo_tumb.jpg (12.71 KiB) Viewed 2595 times

Hert
Posts: 20345
Joined: 13 Sep 03 7:24

Re: saving jpeg : green or blue on red lines problem

Post by Hert » 04 Feb 14 13:07

I've never seen that. Maybe save with a higher JPG quality?
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Mike Buckley
Posts: 4561
Joined: 10 Jul 08 14:18

Re: saving jpeg : green or blue on red lines problem

Post by Mike Buckley » 04 Feb 14 14:13

I've created over 10,000 JPEGs using IDimager V4 and V5 and none of them have ever been created incorrectly.

Alain
Posts: 237
Joined: 28 Nov 06 21:30
Location: Aartselaar,Vlaanderen

Re: saving jpeg : green or blue on red lines problem

Post by Alain » 04 Feb 14 17:56

Hi

I used 96 in the example and tried just with 100 with the same effect.

Mike : I hadn't seen it before either, but it's very reproducible. It's also only visible on if you see the image at 100%, which is normal on web pages. I resize it to 800pix and this is displayed.

BTW. The tif is OK and pwp does the conversion good.

Mike Buckley
Posts: 4561
Joined: 10 Jul 08 14:18

Re: saving jpeg : green or blue on red lines problem

Post by Mike Buckley » 04 Feb 14 21:30

Alain wrote:It's also only visible on if you see the image at 100%
99.99% of the JPEGs that I create are always viewed at 100%. Sorry to learn that you're having this experience.

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