MATLAB: Imhist for an spm image

converthistogramimage processing

Hello,

I'm working on spm images and their intensity are between 0 and 1913!! I would first of all create an histogram for this image.. so could I modify the imhist code and have you an idea how to creat this histogram ?

second, I would convert their values to [0 255] but it doesn't work

I = imread('spmimg.img'); X=(I.*255)./1913;

thank you

Best Answer

uint8(double(I) .* (255/1913))

Related Solutions

MATLAB: Trouble using imhist in image

You're passing in a color image and imhist() is not set up for that. If you want 3 histograms, extract each color channel independently,

% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);

like in the attached demo, and histogram each color channel one at a time. Or if you don't care which color channel, then just lump them all together with (:)

imhist(rgbImage(:));

MATLAB: Intensity transformation

Just change this to set your desired min and max:

Let f be your array. Then . . .

originalMinValue = double(min(min(f)))
originalMaxValue = double(max(max(f)))
originalRange = originalMaxValue - originalMinValue;
% Get a double image in the range -1 to +1
desiredMin = -1;
desiredMax = 1;
desiredRange = desiredMax - desiredMin;
normalized = desiredRange * (double(grayImage) -
originalMinValue) / originalRange + desiredMin;

Best Answer

Related Solutions

MATLAB: Trouble using imhist in image

MATLAB: Intensity transformation

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