Adds product of 2 images or thier selected regions to accumulator acc

C# | Visual Basic | Visual C++ |

- image1 (IntPtr)
- First input image, 1- or 3-channel, 8-bit or 32-bit floating point (each channel of multi-channel image is processed independently)
- image2 (IntPtr)
- Second input image, the same format as the first one
- acc (IntPtr)
- Accumulator of the same number of channels as input images, 32-bit or 64-bit floating-point
- mask (IntPtr)
- Optional operation mask