I have a RGB image with only black and white colour pixels.I want to overlay it on a grayscale image with only white colour pixel visible and black colour become transparent?
MATLAB: How to superimpose a RGB image over gray image with background to be transparent
image processingMATLAB
Related Solutions
Unlike many line plots, the color property cannot be used to set transparency in errorbar().
Transparency can be set from within the hidden Bar and Line objects that represent the errorbars and trend line, respectively.
% Plot errorbars
clahold onplot(rand(20),rand(20)*2-.5, 'yo', 'MarkerFaceColor', 'k', 'MarkerSize', 15, 'LineWidth', 1.5);h = errorbar(linspace(0,1,5), linspace(0,1,5), .5*ones(1,5), 'r', 'LineWidth', 10);% Set transparency level (0:1)
alpha = 0.65; % Set transparency (undocumented)
set([h.Bar, h.Line], 'ColorType', 'truecoloralpha', 'ColorData', [h.Line.ColorData(1:3); 255*alpha])
compass() creates a hidden child of the axis, of type patch.
ph = allchild(gca);set(ph(end),'FaceColor','none')
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