1108f6f5e1
Useful to correct images from digtal camera with CCD defects PR: 39157 Submitted by: Amar Takhar <verm@drunkmonk.net>
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973 B
Text
17 lines
973 B
Text
"Jpegpixi" is short for "JPEG pixel interpolator". The intent of the
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program is to interpolate pixels in JFIF images (commonly refered to as
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"JPEG images"). This is useful to correct images from a digital camera
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with CCD defects. For example, if one pixel is always bright green, this
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pixel can be interpolated away with jpegpixi.
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Jpegpixi is unique in that it tries to preserve the quality of the JFIF
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image as much as possible. Usual graphics programs decode JFIF images
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when they are loaded, and re-encode them when they are saved, which
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results in an overall loss of quality. Jpegpixi, on the other hand, does
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not decode and re-encode the image, but manipulates the encoded image
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data (known as the "DCT coefficients"). Therefore, the blocks (typically
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8x8, 8x16, or 16x16 pixel areas) which contain the pixels to be
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interpolated are minimally disturbed, and other blocks remain
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pixel-by-pixel identical to the original image.
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WWW: http://jpegpixi.sourceforge.net/
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