MATLAB: I want to control the color of a contour plot. I want to assign a specific color to a range of Z values. I will have 4 colors and I want to control the data ranges for these colors.

contour colors

I want to control the color of a contour plot. I want to assign a specific color to a range of Z values. I will have 4 colors and I want to control the data ranges for these colors.

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Like this, perhaps?

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MATLAB: Binary mask of RGB image

Try this:

% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
redMask = redChannel >= redMin & redChannel <= redMax;
greenMask = greenChannel >= greenMin & greenChannel <= greenMax;
blueMask = blueChannel >= blueMin & blueChannel <= blueMax;
finalMask = redMask | greenMask | blueMask;

MATLAB: I want to display binary image in blue color…

You can change the colormap to contain blue and white. Like this:

I = im2bw(imread('cameraman.tif'));
imshow(I)
colormap([0 0 1; 1 1 1]) % Blue = [0 0 1], White = [1 1 1]

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MATLAB: Binary mask of RGB image

MATLAB: I want to display binary image in blue color…

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