16-bit signed 1D (row) sum to 32f. Apply Row Window Summation filter over a 1D mask region around each source pixel for 3-channel 16-bit pixel input images with 32-bit floating point output. Result 32-bit floating point pixel is equal to the sum of the corresponding and neighboring row pixel values in a mask region of the source image defined by nKernelDim and nAnchorX.