613143 - JPEG image rendered with dark horizontal stripes

Status: RESOLVED WORKSFORME

(Core :: Graphics: ImageLib, defect)

Description

[Felix]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12

Black and white JPEG picture shows dark horizontal stripes in relatively dark zones. Other browsers didn't show those on the same page.

Screen shot of the facebook gallery shown with firefox :
http://img151.imageshack.us/img151/2082/bugfirefoxphoto.jpg

Screen shot of the facebook gallery shown with opera :
http://img541.imageshack.us/img541/6302/bugfirefoxhowitlooksono.jpg

Reproducible: Always

Steps to Reproduce:
1. Get the right image ! difficult to say what it is. but I guess it has to do with the fact that the picture is B&W and quite dark.
2.
3.
Actual Results:  
N/A

Expected Results:  
N/A

N/A

Comment 1

[(mostly gone) XtC4UaLL [:xtc4uall]]

The Links are useless since Imageshack deleted the Images.
Rather use the "Add an attachment" Function.
Also provide a direct Link to the concerning Image, if possible.

Comment 2

[Felix]

Attachment: Picture showing the black stripes. [NSFW]

Please don't use this picture other-where. I don't have any rights on it, it's only for illustration of the bug.

Comment 3

[Felix]

Attachment: Same picture shown in Opera[NSFW]

Please don't use this picture other-where. I don't have any rights on it, it's only for illustration of the bug.

Comment 4

[Felix]

Attachment: The original picture downloaded.[NSFW] It looks bad when opening in FF, but good with the windows preview.

Please don't use this picture other-where. I don't have any rights on it, it's only for illustration of the bug.

Comment 5

[Felix]

I added some attachments with the picture and some screen shots. Didn't knew that there is the possibility of attaching files. Didn't knew neither that imageshack is very sensitive with some minor nudity.

Comment 6

[Daniel Holbert [:dholbert]]

I see the (faint) stripes in your first screenshot.  I don't see them when I directly load the image, though -- tried both Firefox nightly trunk [1] and a Firefox 3.6.12 [2]

[1] Mozilla/5.0 (X11; Linux i686; rv:2.0b8pre) Gecko/20101118 Firefox/4.0b8pre
[2] Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12

I'm on Linux, though, so maybe this is a Windows-only bug.

Comment 7

[Daniel Holbert [:dholbert]]

Felix: Could you test this in the Firefox 4.0 beta, to see if that's affected? ( http://www.mozilla.com/en-US/firefox/all-beta.html )

Comment 8

[Felix]

Test on 4.0b7 positive... the issue is exactly the same.

Comment 9

[Joe Drew (not getting mail)]

We've switched JPEG decoding libraries since then, and this looks fine to me.

It might also be that this is a problem of colour correction-if so, reopen this bug so we can track it down.