Java Array RGB Manipulation

Question

Ok so lets say I have an int[][] arrayA and an int[][] arrayB. At any given coordinate in this array lies an RGB value. What I want to do is merge the RGB values from arrayA and array2 into a new array, newArray, using a weighted average method.

So what I'm doing is extracting the red, green, and blue values from each RGB value like this:

        curColA=RGB //suppose RGB is just the RGB in any given point

        int curRedA = (curCol >> 16) & 0xFF;

        int curGreenA = (curCol >> 8) & 0xFF;

        int curBlueA= curCol & 0xFF;

I do the same for arrayB, and now I want to merge them. Here's where I'm having trouble. Do I just do newRed=(curRedA+curRedB)/2 or is there some other way to do this?

arrayA values:  { { 0, 0x44, 0x5500, 0x660000 } };
arrayB values:  { { 2, 4, 6, 8 } };
newArray expected values: { 0, 0x44, 6, 0x660000 } };

Answer 1

A weighted average is usually done something like:

newRed = (curRedA * redWeight + curRedB * (1 - redWeight));

...where redWeight is in the range [0, 1], and represents the weight (or bias) towards red values in the 'A' array. It also represents the inverse of the bias toward the red values in the 'B' array.