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2. Blend modes - Wikipedia

   en.wikipedia.org/wiki/Blend_modes

   Dodging lightens an image, while burning darkens it. Dodging the image is the same as burning its negative (and vice versa). Dodge modes: The Screen blend mode inverts both layers, multiplies them, and then inverts that result. The Color Dodge blend mode divides the bottom layer by the inverted top layer. This lightens the bottom layer ...

3. Shadow and highlight enhancement - Wikipedia

   en.wikipedia.org/wiki/Shadow_and_highlight...

   One way to brighten shadows in image editing software such as GIMP or Adobe Photoshop is to duplicate the background layer, invert the copy and set the blend modes of that top layer to "Soft Light". You can also use an inverted black and white copy of the image as a mask on a brightening layer, such as Curves or Levels.

4. Negative (photography) - Wikipedia

   en.wikipedia.org/wiki/Negative_(photography)

   The negative of such an image has the luminance inverted but not the colour. Whereas a physical image can be either ‘inverted’ or ‘not inverted’, a digital image can exhibit a partial degree of colour inversion [ 11 ] in so far as the hue can be altered by plus or minus some number of degrees which is greater than zero degrees but less ...

5. Comparison of image viewers - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_image_viewers

   Fit to window, zoom, print, full-screen, slideshow, image collection, image information... Rotate, flip, save as, used for reading comics and manga. Proprietary: Darktable: Lighttable (contact sheet), darkroom (image editing), map, tethering Non-destructive RAW photo editing (like Adobe Lightroom) as well as common image formats GPL-3.0-or ...

6. Dove prism - Wikipedia

   en.wikipedia.org/wiki/Dove_prism

   A Dove prism is a type of reflective prism which is used to invert an image. Dove prisms are shaped from a truncated right-angle prism. The Dove prism is named for its inventor, Heinrich Wilhelm Dove. Although the shape of this prism is similar to the shape described by a dovetail joint, the etymology of the two is unrelated.

7. Kernel (image processing) - Wikipedia

   en.wikipedia.org/wiki/Kernel_(image_processing)

   In image processing, a kernel, convolution matrix, or mask is a small matrix used for blurring, sharpening, embossing, edge detection, and more.This is accomplished by doing a convolution between the kernel and an image.