matlab的stretchlim函数

最新推荐文章于 2022-09-16 16:54:00 发布

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最新推荐文章于 2022-09-16 16:54:00 发布 · 2k 阅读

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stretchlim函数用于寻找图像对比度拉伸的限制值，以增加图像的对比度。该函数根据输入参数容忍度TOL来确定饱和图像的低亮和高亮部分。默认情况下，TOL=[0.01 0.99]，将2%的图像像素饱和。对于RGB图像，该函数会对每个颜色通道应用相同的饱和度。通过与imadjust函数结合使用，可以有效调整图像的亮度和对比度。

ction lowhigh = stretchlim(varargin)
%STRETCHLIM Find limits to contrast stretch an image.
%   LOW_HIGH = STRETCHLIM(I,TOL) returns a pair of intensities that can be
%   used by IMADJUST to increase the contrast of an image.
%
%   TOL = [LOW_FRACT HIGH_FRACT] specifies the fraction of the image to
%   saturate at low and high intensities. 
%
%   If TOL is a scalar, TOL = LOW_FRACT, and HIGH_FRACT = 1 - LOW_FRACT,
%   which saturates equal fractions at low and high intensities.
%
%   If you omit the argument, TOL defaults to [0.01 0.99], saturating 2%.
%
%   If TOL = 0, LOW_HIGH = [min(I(:)) max(I(:))].
%
%   LOW_HIGH = STRETCHLIM(RGB,TOL) returns a 2-by-3 matrix of intensity
%   pairs to saturate each plane of the RGB image. TOL specifies the same
%   fractions of saturation for each plane.
%
%   Class Support
%   -------------
%   The input image can be of class uint8, uint16, or double. The output
%   intensities are of class double and have values b