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  2. Help : How to reduce colors for saving a JPEG as PNG

    en.wikipedia.org/wiki/Help:How_to_reduce_colors...

    Use the color to alpha tool with the background color to remove the fringe. Now cancel the selection, go to the Channels panel and deselect the Alpha channel, then go back to the layers panel. Use the fill tool to fill the selection with the main color. (Since you turned off alpha, this will not affect the transparent section.)

  3. GIMP - Wikipedia

    en.wikipedia.org/wiki/GIMP

    There are many tools that can be used for editing images in GIMP. The more common tools include a paint brush, pencil, airbrush, eraser and ink tools used to create new or blended pixels. The Bucket Fill tool can be used to fill a selection with a color or pattern. The Blend tool can be used to fill a selection with a color gradient.

  4. Raster graphics editor - Wikipedia

    en.wikipedia.org/wiki/Raster_graphics_editor

    Darktable, a raw photo post-processing application GIMP, a feature-rich general-purpose raster graphics editor. A raster graphics editor (also called bitmap graphics editor) is a computer program that allows users to create and edit images interactively on the computer screen and save them in one of many raster graphics file formats (also known as bitmap images) such as JPEG, PNG, and GIF.

  5. Color picker - Wikipedia

    en.wikipedia.org/wiki/Color_picker

    A screenshot of the GTK+ 2 color picker. A screenshot of the Qt color picker. GIMP color picker.. A color picker (also color chooser or color tool) is a graphical user interface widget, usually found within graphics software or online, used to select colors and, in some cases, to create color schemes (the color picker might be more sophisticated than the palette included with the program).

  6. Blend modes - Wikipedia

    en.wikipedia.org/wiki/Blend_modes

    Most graphics editing programs, such as Adobe Photoshop and GIMP, allow users to modify the basic blend modes, for example by applying different levels of opacity to the top "layer". The top "layer" is not necessarily a layer in the application; it may be applied with a painting or editing tool.

  7. Color balance - Wikipedia

    en.wikipedia.org/wiki/Color_balance

    Comparison of color versions (raw, natural, white balance) of Mount Sharp (Aeolis Mons) on Mars A white-balanced image of Mount Sharp (Aeolis Mons) on Mars. Most digital cameras have means to select color correction based on the type of scene lighting, using either manual lighting selection, automatic white balance, or custom white balance. [6]

  8. Indexed color - Wikipedia

    en.wikipedia.org/wiki/Indexed_color

    A 2-bit indexed color image. The color of each pixel is represented by a number; each number (the index) corresponds to a color in the color table (the palette).. In computing, indexed color is a technique to manage digital images' colors in a limited fashion, in order to save computer memory and file storage, while speeding up display refresh and file transfers.

  9. Free-form select - Wikipedia

    en.wikipedia.org/wiki/Free-form_select

    Free-Form Select (with synonyms) is a technique in printmaking, graphic design and image processing. The effect is to erase background colors or elements from a motif to create stand-alone objects. Today, this is done with graphics software ( computer graphics ) and computers rather than by cutting away parts with scissors or scalpels .