In any case, repair is much easier with a source not having so many JPEG artifacts. We may have more luck with scans where the background is lighter or with colored scans where writing and background may have a different color. Some artifact removal can be achieved, and we may get some better results than the quick examples above with optimal settings or after leaving more of the background noise in the image but from the example here this still may not be quite what we hoped, unfortunately. In case we had many such documents to process all this will need a lot of manual work in addition, and then it will be a matter of days or weeks rather than hours with a sadly doubtful outcome. This will become more obvious after we had performed some despeckling (here using the Wavelet-Denoise plugin), and adjustments of contrast: But we can see whatever setting we chose some lines will still be there when the handwriting already degrades: About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. Therefore repair tools will have a hard time to separate artifacts from important parts.įor the removal of lines we can try with G'Mic > Repair > Unstrip filter of the Grey's Magic Tools plugin which makes use of Fourier's transformation for artifact removal. How can I (using Gimp) accurately remove a red background from an image Hot Network Questions Euler Substitution Whats the best way to get from Billund Airport to Legoland Resort Hotel Do covalent networks experience dipole-dipole forces Using English in Europe. In addition there are heavy JPEG artifacts. When you've done this a couple of times and there's no white or grey left in the image, you can merge that layer down as well to have the whole foreground on one layer.The scanning we have as an example shows many artifacts which have only little difference in color or brightness. Maybe duplicate it even more times, merging them down unto the layer immediately above the bottom layer. Then duplicate the new layer and merge it down (from its right click menu). Go to File from the left corner of the top bar and click on the open & select the image file you like to work. For removing the image background, at first, you should open your image in GIMP. In GIMP, to remove background this tool works nicely. Method 1: Magic WandEdit Firstly, right click on the layer you are working on and add an alpha channel if there is not already one. The set the mode of the new layer to multiply. Fuzzy Selection Tool The work of this tool is the same as the magic wand tool of Photoshop. If you can't see the tool options, you can add it from the dockable dialogs submenu of the window menu.ĥ) Clear it (press delete on the keyboard, or select clear from the edit menu).Ħ) (optional) Duplicate the layer using its right click menu or ctrl-shift-d. You can also use the option in the layer menu.Ģ) Select the "select by color" tool (shift-o).ģ) You may want to adjust the tool options, especially the thresold. To do this, you may need to right click on the layer (Ctrl-l if the list of layers isn't visible), then click "add alpha channel" if it isn't greyed out. This method kind of assumes you're using a black foreground on a white background, and wouldn't work for other colour combinations unless you change the last step.ġ) Ensure the layer has transparency enabled. Also, you could apply those tools after the color-to-alpha if the text had somehow got grey edges.Īlternatively, you can use the select by color tool. The colors menu has tools such as brightness-contrast and curves which you could use to increase the difference before the change. It could be done with the color to alpha tool from the color menu, assuming the foreground and background colours are different enough from each other (as they should be for black text on a white background.
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