MATLAB: Colour specification for gray colour

colour specifivation

I have a line taken fron wavelet3d demo

hiso = patch(isosurface(Ds,5),'FaceColor','k','EdgeColor','none');

k gives black colour,but i need gray colour instead of black,please tell the colour code for gray colour

Best Answer

Use a 1 by 3 array of numbers in the range 0-1, for example:

hiso = patch(isosurface(Ds,5),'FaceColor',[0.5 0.5 0.5],'EdgeColor','none');

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MATLAB: Create a specular colormap

figure; imagesc( rand(100) - 0.5 ); % Random data centred on 0
baseCmap = hot( 256 );
cmap = [ flip( baseCmap(2:end,:) ); baseCmap  ];
colormap( cmap )
caxis( [-0.5 0.5] )

MATLAB: Increase RGB image saturation.

This is easier in HSV colorspace:

RGB = rand(100, 100, 3);
HSV = rgb2hsv(RGB);
% "20% more" saturation:
HSV(:, :, 2) = HSV(:, :, 2) * 1.2;
% or add:
% HSV(:, :, 2) = HSV(:, :, 2) + 0.2;
HSV(HSV > 1) = 1;  % Limit values
RGB = hsv2rgb(HSV);

Best Answer

Related Solutions

MATLAB: Create a specular colormap

MATLAB: Increase RGB image saturation.

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