Do you know which pH value each RGB value corresponds to? If you do a lookup table should prove usefull.
Im reducing the total amount of colors to keep it short here... This is by no means the best way of implementing a lookup table, but it can get you started in thinking.
Say the RGB triplet [1,1,0] represents a pH of 8;
We create an array of all rgb triplets
RGB = [ 0 0 0
1 0 0
0 1 0
0 0 1
1 1 0
1 0 1
0 1 1
1 1 1];
We then define a vector of corresponding ph Values
pH = [1
2
4
7
8
9
12];
We find the index in RGB that matches the RGB data from imageJ
imageJ = [1,1,0];
for i = 1:size(RGB,1)
if imageJ == RGB(i,:);
ind = i;
break
end
end
ResultingpH = pH(i)
