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I should probably make clear that I am not trying to order people around or make rules. This is just a peaceful request with a reason why. All this is about is making it easier for uploaders making an educated decision in what format they choose to upload. I updated the thread title to reflect that better.
This issue does exist for interlaced images with color management enabled in Firefox (see bug report on bugzilla), but won't truly be a major issue until Q1 2009 when Firefox 3.1 is released with Color Management on all imaged enabled by default (if the issue isn't fixed first).
It is ultimately up to the uploaders to use whatever format image they chose and I'm not disputing that. I made this post to make people aware that there is an issue for some people and it would be nice if they would avoid uploading images in a potentially problematic format.
Interlaced/Progressive formats are never the default anyways so people are making a conscious effort to chose them but may or may not understand the implications of doing so.
It is currently my personal preference to use Color Management in Firefox (when 3.1 is released this will no longer be the case). Interlaced/Progressive images on the other hand may or may not be the personal preference of an uploader. I have a feeling that most are rather indifferent on the issue and wouldn't have an issue avoiding interlaced formats.
PNG is lossless, so saving an interlaced PNG to a non-interlaced PNG is also lossless is shouldn't be an issue to do before uploading. So from a quality standpoint there is no reason to upload an interlaced PNG image. Now if the uploader wants to take the time do this is ultimately the decision of the uploader and many may decide not to and that's ok.
JPEGs are a different story though considering they are lossy. Some images come from sources other then the uploader and may be in progressive (interlaced) format. For these outside images there is no point in re-saving them as non-interlaced and sustain more quality loss to the image so should continued to be uploaded as-is.
Cyberbeing
This issue does exist for interlaced images with color management enabled in Firefox (see bug report on bugzilla), but won't truly be a major issue until Q1 2009 when Firefox 3.1 is released with Color Management on all imaged enabled by default (if the issue isn't fixed first).
It is ultimately up to the uploaders to use whatever format image they chose and I'm not disputing that. I made this post to make people aware that there is an issue for some people and it would be nice if they would avoid uploading images in a potentially problematic format.
Interlaced/Progressive formats are never the default anyways so people are making a conscious effort to chose them but may or may not understand the implications of doing so.
It is currently my personal preference to use Color Management in Firefox (when 3.1 is released this will no longer be the case). Interlaced/Progressive images on the other hand may or may not be the personal preference of an uploader. I have a feeling that most are rather indifferent on the issue and wouldn't have an issue avoiding interlaced formats.
PNG is lossless, so saving an interlaced PNG to a non-interlaced PNG is also lossless is shouldn't be an issue to do before uploading. So from a quality standpoint there is no reason to upload an interlaced PNG image. Now if the uploader wants to take the time do this is ultimately the decision of the uploader and many may decide not to and that's ok.
JPEGs are a different story though considering they are lossy. Some images come from sources other then the uploader and may be in progressive (interlaced) format. For these outside images there is no point in re-saving them as non-interlaced and sustain more quality loss to the image so should continued to be uploaded as-is.