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A colour cast is a tint of a particular colour, usually unwanted, that evenly affects a photographic image in whole or in part. [1] Certain types of light can cause film and digital cameras to render a colour cast. Illuminating a subject with light sources of different colour temperatures will usually
Color correction is a process used in stage lighting, photography, television, cinematography, and other disciplines, which uses color gels, or filters, to alter the overall color of the light. Typically the light color is measured on a scale known as color temperature , as well as along a green – magenta axis orthogonal to the color ...
An image that is not color balanced is said to have a color cast, as everything in the image appears to have been shifted towards one color. [9] [page needed] Color balancing may be thought in terms of removing this color cast. Color balance is also related to color constancy. Algorithms and techniques used to attain color constancy are ...
There are two versions of the E-6 process. Commercial laboratories use a six-bath chemical process. The 'hobby' type chemistry kits, such as those produced by Tetenal, use three chemical baths that combine the color developer and fogging (reversal) bath solutions, and the pre-bleach, bleach and fixer bath solutions.
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Unwanted color casts are removed and the image's contrast or sharpening may be altered to restore the contrast range or detail believed to have been in the original physical image. Digital image processing techniques included in image enhancement and image restoration software are also applied to digital photograph restoration.
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An example of colour banding, visible in the sky in this photograph An illustration of colour banding. Only 3 bits are used for the red channel in the left two images, 8 bits in the right image.