Extract numeric values from a colormap
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Hello everyone
I am trying to extract the numerical values of a variable represented in the following colormap with its respective colorbar (which I also attach in PDF format):
It would be very desirable to be able to create a database based on the spatial deviation from the center of the hexagon along the directions defined by the a1 and a2 vectors as a fraction of a0, being a0 the modulus of the aforementioned vectos:
Any idea?
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Image Analyst
2024-5-19
编辑：Image Analyst
2024-5-19
You need to read that colorbar part of the image and then divide by 255.
colorsInBar = rgbImage(row1:row2, col1:col2, :);
[r, g, b] = imsplit(colorsInBar);
cMap = double([r(:), g(:), b(:)]) / 255;
You may be interested to see how I did it for thermal images:
To get the numbers you can use ocr in the Computer Vision Toolbox, but the numbers must be at least 20 pixels high.
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2024-5-19
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