JPG striping colors problem in browser display

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ghost zero
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JPG striping colors problem in browser display

Post by ghost zero » Mon Feb 05, 2007 8:45 pm

For the attached sample JPG image, there is a striping colors problem in browser display. Happens in fullscreen and in the preview area. But this problem doesn't happen to the image if tabbed--the image is smoother. Can this be fixed?

sample JPG image:
Image

problem:
Image

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xnview
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Re: JPG striping colors problem in browser display

Post by xnview » Tue Feb 06, 2007 8:43 am

ghost zero wrote:For the attached sample JPG image, there is a striping colors problem in browser display. Happens in fullscreen and in the preview area. But this problem doesn't happen to the image if tabbed--the image is smoother. Can this be fixed?
Strange i can't reproduce it, and i use the same resize method.
You have a low resolution on your screen 800x600??
Pierre.

ghost zero
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Post by ghost zero » Tue Feb 06, 2007 2:36 pm

i use 1600x1200 32 bit. did you try using the test image above?

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Olivier_G
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Post by Olivier_G » Tue Feb 06, 2007 6:57 pm

I confirm having a small difference between Browser's fullscreen and Viewer, even when viewed at 100% (ie: no resize)... but it's slightly different from what you get (I have 1600x1200 32 bits too).

Here is the pattern of the difference once expanded to the maximum:

Image

This difference is maybe due to slight differences in colour adjustements... :? ...although this image has no ICC embedded profile.
Olivier

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Post by ghost zero » Tue Feb 06, 2007 7:25 pm

btw: the screenshot was taken with a test image 2x larger

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Post by xnview » Wed Feb 07, 2007 9:29 am

Olivier_G wrote:I confirm having a small difference between Browser's fullscreen and Viewer, even when viewed at 100% (ie: no resize)... but it's slightly different from what you get (I have 1600x1200 32 bits too).

Here is the pattern of the difference once expanded to the maximum:

Image

This difference is maybe due to slight differences in colour adjustements... :? ...although this image has no ICC embedded profile.
Ok, i understand. The difference is the loading. I use for preview jpeg fast arithmetic, so i think that it's not a good idea...
Pierre.

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Drahken
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Post by Drahken » Wed Feb 07, 2007 12:11 pm

You can't really get the same results with the half sized image. However, if you use xnview to double size the image and save it, then run the tests, you should get the same results. It clearly has something to do with resizing in the preview pane. If you change the size of the preview pane and watch the image, you can see the stripes change. They become more obvious at certain points and less obvious at others.

It should also be noted that the striping is in the original image to a certain degree, but is normally not apparent unless you zoom in and look very closely.
My guess is that the preview pane isn't using high quality zoom (I remember some post along the same lines here ages ago, don't recall whatever became of the issue). I tried turning off the high quality enlarge/reduce settings under view in the options, but it had no effect on either the preview pane, nor the viewer mode.

ghost zero
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Post by ghost zero » Wed Feb 07, 2007 4:12 pm

remember this problem also happens in the fullscreen mode from browser

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Post by ghost zero » Thu May 31, 2007 9:02 am

fixed yet?

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Post by xnview » Thu May 31, 2007 9:08 am

ghost zero wrote:fixed yet?
Yes
Pierre.

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