![]() Also, since you mentione file-size, these are actually bigger than the original, colored one, which is interesting. Go to Image>Mode>Grayscale (I think that’s what it’s called in english, not a 100 % sure, but it should at least be something in that vein).Īs the bottom line, I’d suggest gradient map, but there are a lot of different ways to go about it. Then go to Filters>Animation>Process Animstack tags. Use the bucket tool and fill it with grey, then set the layer mode as saturation and color. Create a new layer on top of all the frames, call it. This one does not require GAP, but Animstack. The whole cancel, ctrl+F is so that you don’t have to put in the value, -100, twice.Ĥ. Go to Filters>Filter all layers>plug-in-wr-huesat (it’s at the bottom), then apply constant, cancel, ctrl+F and put the saturation as -100. Changing the mode to RGB removes the colormap, and allows for all of the 224 colors of 8-bit-per-channel RGB. Any image you open as a layer into this image will have its colors adjusted to the existing colormap. Put this:Ī bit over-exposed, right? You can play around with the settings, the sliders you see above, but this doesn’t seem to be the best method.ģ. When the first image is opened, its colormap becomes the colormap for the image in GIMP (kinda natural, when you think about it). Go to Filters>Filter all layers>plug-in-colors-channel-mixer, apply varying, cancel and ctrl+F. Then, assuming you have GAP (otherwise go here), go to Filters>Filter all layers>plug-in-gradmap, click apply constant and then ok and ok.Ģ. The colors shall look like this:Īnd clicking on the gradient icon in the left window, on the settings part that’s in the bottom of the left window, make it look like this (it’s the default): I’d start by basic coloring, making it black and white, and then some final adjustments.ġ. There are five ways to go about this, IDK which one’s the best. So your decoder ignores the background color of GIF hence rendering incorrectly as the incremental render does not work with non black color background. So simply your GIF is buggy and only buggy GIF decoder can render it properly. ![]() So my guess is the GIF of yours have some extention packet telling brownser to use different disposal method then the one stored in GIF header. Animated gif only loops once in Chrome and Firefox.Simply because all of them use the same image lib for decoding GIFs which is simply coded badly (or by design). Nowadays WEB browsers (for few years now) depend on undocumented custom made extentions added to GIFs extention packets (and not part of any GIF specs) and ignores the GIF file format completely for some aspects of rendering (like looping). The workaround is quite simple: convert your image to the indexed color model before exporting the GIF file ( image->mode. It is at this point that your yellowish background is being created. Maybe this should be handled as transparent image with background but even decent image viewer (like FastStone Image Viewer) shows the same thing so I doubt this is the case. If you dont downsacle colros prior to exporting them, GIMP will do that automatically at the export step itself. So there are 2 possible things at play here: ![]() ![]() When I render it with my decoder it looks like this: Here are the disposals possible: if (disposal=0) s="no animation" Įlse if (disposal=1) s="leave image as is" Įlse if (disposal=2) s="clear with background" Įlse if (disposal=3) s="restore previous image" The problem is the image is with black background and not white. Your gif is disposal = 3 that means it needs previous image as it renders incrementally. gif with corrupted alpha channel (stuck pixels) collected with Graphicsmagick? ![]()
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