Change Fractal Colors to nuances of red
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Silvia Bernardi
on 16 Aug 2019
Commented: Adam Danz
on 19 Aug 2019
Hello,
I have a series of fractals in RGB, such as the one uploaded here, and I would like to change their colors to only nuances of red, black and white. So that the structure of the image would remain in white or black and the filling will be only red. Any suggestions would be welcome.
2 Comments
Walter Roberson
on 16 Aug 2019
Possibly rgb2ind() followed by using a different colormap() with ind2rgb()
Accepted Answer
Subhadeep Koley
on 19 Aug 2019
Tweaking the "hex" vector as shown below could help solve the issue.
a=imread('image0006v1.bmp');
%modify the sample points inside vec and put the hex code for as many different shades of red you want
vec = [ 100; 83; 68; 44; 30; 15; 0];
hex = ['#FF6347';'#DC143C';'#FF0000';'#B22222';'#B22222';'#8B0000';'#800000'];
raw = sscanf(hex','#%2x%2x%2x',[3,size(hex,1)]).' / 255;
%N =100;
N = size(get(gcf,'colormap'),1) % size of the current colormap
map = interp1(vec,raw,linspace(100,0,N),'spline');
rgbImage = ind2rgb(a, map);
imshow(rgbImage);
1 Comment
Adam Danz
on 19 Aug 2019
The RGB vectors may be easier to work with. For example, here's a colormap that fades from black to red.
colorMap = [linspace(0,1,256)', zeros(256,2)]
colormap(colorMap);
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