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2. Darkroom manipulation - Wikipedia

   en.wikipedia.org/wiki/Darkroom_manipulation

   Masking in darkroom photography can be used with more than one mask for the image by putting the original image and the mask together to come out with the single print. The advantages of masking is that this process sharpens the image and if done correctly, the contrast of the image could change when the image prints out.

3. Unsharp masking - Wikipedia

   en.wikipedia.org/wiki/Unsharp_masking

   Unsharp masking (USM) is an image sharpening technique, first implemented in darkroom photography, but now commonly used in digital image processing software. Its name derives from the fact that the technique uses a blurred , or "unsharp", negative image to create a mask of the original image.

4. Photomask - Wikipedia

   en.wikipedia.org/wiki/Photomask

   A photomask (also simply called a mask) is an opaque plate with transparent areas that allow light to shine through in a defined pattern. Photomasks are commonly used in photolithography for the production of integrated circuits (ICs or "chips") to produce a pattern on a thin wafer of material (usually silicon ).

5. Mask (computing) - Wikipedia

   en.wikipedia.org/wiki/Mask_(computing)

   In computer graphics, when a given image is intended to be placed over a background, the transparent areas can be specified through a binary mask. [1] This way, for each intended image there are actually two bitmaps: the actual image, in which the unused areas are given a pixel value with all bits set to 0s, and an additional mask, in which the ...

6. Visual masking - Wikipedia

   en.wikipedia.org/wiki/Visual_masking

   Visual masking involves surrounding a target image (here, the word "radio") with another image. Visual masking is a phenomenon of visual perception. It occurs when the visibility of one image, called a target, is reduced by the presence of another image, called a mask. [1] The target might be invisible or appear to have reduced contrast or ...

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 .

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   mail.aol.com

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9. Masking (art) - Wikipedia

   en.wikipedia.org/wiki/Masking_(art)

   Unsharp masking allows the photographer to sharpen areas that have become blurred in the original negative, due to long shutter speed/exposure time, or from using a wide aperture/"fast" lens. When creating the unsharp mask, extra space or diffusing material is added between the image and the mask to produce the necessary blur.