how to rectify this error

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kalpana
kalpana 2014-1-23
回答： Walter Roberson 2014-1-23
Error using imhist Expected input number 1, I or X, to be two-dimensional.
Error in imhist>parse_inputs (line 277) validateattributes(a, {'double','uint8','int8','logical','uint16','int16','single','uint32', 'int32'}, ...
Error in imhist (line 59) [a, n, isScaled, top, map] = parse_inputs(varargin{:});
Error in mainnnn (line 7) [p,x]=imhist(J,256);

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回答（1 个）

Walter Roberson
Walter Roberson 2014-1-23
You probably used imread() to read in an image, and the image is stored as a 3 dimensional matrix because it is an RGB (truecolor) image. imhist() can only be applied to 2D images such as grayscale images.

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