Lines Matching refs:levels
417 <p>MagickAutoLevelImage() adjusts the levels of a particular image channel by scaling the minimum and maximum values to the full quantum range.</p>
2134 <p>MagickGammaImage() gamma-corrects an image. The same image viewed on different devices will have perceptual differences in the way the image's intensities are represented on the screen. Specify individual gamma levels for the red, green, and blue channels, or adjust all three with the gamma parameter. Values typically range from 0.8 to 2.3.</p>
3907 <p>MagickLevelImage() adjusts the levels of an image by scaling the colors falling between specified white and black points to the full available quantum range. The parameters provided represent the black, mid, and white points. The black point specifies the darkest color in the image. Colors darker than the black point are set to zero. Mid point specifies a gamma correction to apply to the image. White point specifies the lightest color in the image. Colors brighter than the white point are set to the maximum quantum value.</p>
4506 <p>MagickOrderedPosterizeImage() performs an ordered dither based on a number of pre-defined dithering threshold maps, but over multiple intensity levels, which can be different for different channels, according to the input arguments.</p>
4527 <dd>A string containing the name of the threshold dither map to use, followed by zero or more numbers representing the number of color levels tho dither between. </dd>
4531 <dd> No numbers also means a 2 level (bitmap) dither will be applied to all channels, while a single number is the number of levels applied to each channel in sequence. More numbers will be applied in turn to each of the color channels. </dd>
4533 <dd> For example: "o3x3,6" generates a 6 level posterization of the image with a ordered 3x3 diffused pixel dither being applied between each level. While checker,8,8,4 will produce a 332 colormaped image with only a single checkerboard hash pattern (50 grey) between each color level, to basically double the number of color levels with a bare minimim of dithering. </dd>
4668 const size_t levels,const DitherMethod method)
4682 <dt>levels</dt>
4683 <dd>Number of color levels allowed in each channel. Very low values (2, 3, or 4) have the most visible effect. </dd>
