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isrgb (Image Processing Toolbox)  Northwestern Engineering
http://www.ece.northwestern.edu/localapps/matlabhelp/toolbox/images/isrgb.html
isrgb. Return true for an RGB image. Syntax. flag = isrgb(A) Description. flag = isrgb(A) returns 1 if A is an RGB truecolor image and 0 otherwise. isrgb uses these criteria to determine if A is an RGB image:. If A is of class double, all values must be in the range [0,1], and A must be mbynby3.; If A is of class uint16 or uint8, A must be mbynby3.
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isRGB  MTEX
https://mtextoolbox.github.io/isRGB.html
Toggle navigation. News; Download; Documentation; Examples; People; Resources. Publications; Changelog; Function Reference
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Error using isrgb (line 7) Function ISRGB has been …
https://www.mathworks.com/matlabcentral/answers/336765errorusingisrgbline7functionisrgbhasbeenremovederrorindemoasift1line4ifisrgbi
Dec 15, 2020 · The function isrgb() has been removed starting with R2011b. Replace this line
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Function Reference: isrgb  SourceForge
https://octave.sourceforge.io/image/function/isrgb.html
Function File: isrgb (img) Return true if img is a RGB image.. A variable can be considered a RGB image if it is a nonsparse, real array of size MxNx3xK, and: of floating point class with values in the [0 1] range or NaN;
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ImageProcessingGUIMatlab/isrgb.m at master
https://github.com/katyperry13/ImageProcessingGUIMatlab/blob/master/isrgb.m
% ISRGB Return true for RGB image. % FLAG = ISRGB(A) returns 1 if A is an RGB truecolor image and % 0 otherwise. % % ISRGB uses these criteria to determine if A is an RGB image: % %  If A is of class double, all values must be in the range % [0,1], and A must be MbyNby3. %
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What happened to isgray, isind, isbw, and isrgb? » Steve
https://blogs.mathworks.com/steve/2007/03/09/whathappenedtoisgrayisindisbwandisrgb/
Mar 09, 2007 · The function isrgb is closely related to isgray, isind, and isbw, which are also obsolete. I thought I'd try to explain the original purpose of these functions, as well as why they are now obsolete. When the Image Processing Toolbox was first being created, in 199293, the only MATLAB data type was a twodimensional, doubleprecision matrix ...
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MATLAB: Error using isrgb (line 7) Function ISRGB has been
https://itectec.com/matlab/matlaberrorusingisrgbline7functionisrgbhasbeenremovederrorindemoasift1line4ifisrgbimg1/
The function isrgb() has been removed starting with R2011b. Replace this line
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Error using rgb2gray>parse_inputs , MAP must be a m x 3
https://www.mathworks.com/matlabcentral/answers/1561641errorusingrgb2grayparse_inputsmapmustbeamx3arrayuseim2grayforrgbandgrayscaleim
Oct 11, 2021 · isRGB = parse_inputs(X); In other words, what you are passing to rgb2gray() is not an RGB image. If you want to save a step in testing whether an input is already grayscale or not, you can substitute im2gray() for rgb2gray(): im2gray() will return arrays unchanged if they are already grayscale.
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c++  How can adding code to a loop make it faster
https://stackoverflow.com/questions/688325/howcanaddingcodetoaloopmakeitfaster
Oct 28, 2009 · So by sometimes doing an extra increment of the iSRGB value you get to skip some of the iterations in the outer loop, thereby reducing the total amount of work the code needs to do. Share. Improve this answer. Follow answered Mar 27 '09 at 3:15. Joel Coehoorn Joel Coehoorn. 369k 107 ...
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Convert RGB image to grayscale  MATLAB im2gray
https://www.mathworks.com/help/matlab/ref/im2gray.html
The im2gray function converts RGB values to grayscale values by forming a weighted sum of the R, G, and B components: 0.2989 * R + 0.5870 * G + 0.1140 * B. These are the same weights used by the rgb2ntsc (Image Processing Toolbox) function to compute the Y component. The coefficients used to calculate grayscale values in the im2gray function ...
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