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Layers can be partially obscured allowing portions of images within a layer to be hidden or shown in a translucent manner within another image. Layers can also be used to combine two or more images into a single digital image. For the purpose of editing, working with layers allows for applying changes to just one specific layer.
The result is most typically merged into the bottom layer using "simple" (b over a) alpha compositing (making the actual formula (,) = (,)), but other Porter-Duff operations are possible. [3] The compositing step results in the top layer's shape, as defined by its alpha channel, appearing over the bottom layer.
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.
The GNU Image Manipulation Program, commonly known by its acronym GIMP (/ ɡ ɪ m p / ⓘ GHIMP), is a free and open-source raster graphics editor [3] used for image manipulation (retouching) and image editing, free-form drawing, transcoding between different image file formats, and more specialized tasks.
Ipe lets users draw geometric objects such as polylines, arcs and spline curves and text. Ipe supports use of layers and multiple pages. It can paste bitmap images from clipboard or import from JPEG or BMP, and also through a conversion software it can import PDF figures generated by other software.
New vector graphics tools (editable text tools, illustration tools with node editing) multiple color/transparency gradients with custom gradient profiles; New special effects (including Bevel, Weave, Blinds), deformations, and filters; JPEG and GIF optimizer tools; Multiple-image layout and printing; Adjustment layers for editable color corrections
JPEG XL has features aimed at web delivery such as advanced progressive decoding, [41] embedded previews, and minimal header overhead, as well as features aimed at image editing and digital printing, such as support for multiple layers, CMYK, and spot colors. It also supports animated images. The main features are: [42] [43] [44] Compression:
Inkscape can write and edit text with tools available for changing font, spacing, kerning, rotation, flowing along the path or into a shape. Text can be converted to paths for further editing. The program also has layers (and objects) feature that allows organizing objects in a preferred stacking order in the canvas.