たとえばimage1の画素値を同サイズのimage2の画素値に足したい場合
image1.with~ { bp1 in image2.with~ { bp2 oin for i in 0..<count { bp1[i] += bp2[i] } } } (edited)image1.with~ { bp1 in image2.with~ { bp2 oin for i in 0..<count { bp1[i] += bp2[i] } } } (edited)