SmoothImage_Gauss_Mask

This operation is a simplified, fast in computation, version of SmoothImage_Gauss, with predefined kernel and simplified ROI handling.

Kernel used in operation can be chosen by inKernel parameter:

• Box_2x2: 3 by 3 pixels kernel similar to 2 by 2 gaussian kernel rotated by 45 degrees: $$ \frac{1}{8}\begin{bmatrix} 0 & 1 & 0 \\ 1 & (4) & 1 \\ 0 & 1 & 0 \\ \end{bmatrix} $$
• Box_3x3: 3 by 3 pixels kernel with StdDev ≈ 0.85 of following form: $$ \frac{1}{16}\begin{bmatrix} 1 & 2 & 1 \\ 2 & (4) & 2 \\ 1 & 2 & 1 \\ \end{bmatrix} $$
• Box_5x5: 5 by 5 pixels kernel with StdDev ≈ 1.1 of following form: $$ \frac{1}{169}\begin{bmatrix} 1 & 3 & 5 & 3 & 1 \\ 3 & 9 & 15 & 9 & 3 \\ 5 & 15 & (25) & 15 & 5 \\ 3 & 9 & 15 & 9 & 3 \\ 1 & 3 & 5 & 3 & 1 \\ \end{bmatrix} $$
• Box_7x7: 7 by 7 pixels kernel with StdDev ≈ 1.7 of following form: $$ \frac{1}{256}\begin{bmatrix} 1 & 2 & 3 & 4 & 3 & 2 & 1 \\ 2 & 4 & 6 & 8 & 6 & 4 & 2 \\ 3 & 6 & 9 & 12 & 9 & 6 & 3 \\ 4 & 8 & 12 & (16) & 12 & 8 & 4 \\ 3 & 6 & 9 & 12 & 9 & 6 & 3 \\ 2 & 4 & 6 & 8 & 6 & 4 & 2 \\ 1 & 2 & 3 & 4 & 3 & 2 & 1 \\ \end{bmatrix} $$
• Box_9x9: 9 by 9 pixels kernel with StdDev ≈ 2.0 of following form: $$ \frac{1}{1089}\begin{bmatrix} 1 & 2 & 4 & 6 & 7 & 6 & 4 & 2 & 1 \\ 2 & 4 & 8 & 12 & 14 & 12 & 8 & 4 & 2 \\ 4 & 8 & 16 & 24 & 28 & 24 & 16 & 8 & 4 \\ 6 & 12 & 24 & 36 & 42 & 36 & 24 & 12 & 6 \\ 7 & 14 & 28 & 42 & (49) & 42 & 28 & 14 & 7 \\ 6 & 12 & 24 & 36 & 42 & 36 & 24 & 12 & 6 \\ 4 & 8 & 16 & 24 & 28 & 24 & 16 & 8 & 4 \\ 2 & 4 & 8 & 12 & 14 & 12 & 8 & 4 & 2 \\ 1 & 2 & 4 & 6 & 7 & 6 & 4 & 2 & 1 \\ \end{bmatrix} $$
• Box_11x11: 11 by 11 pixels kernel with StdDev ≈ 2.2 of following form: $$ \frac{1}{4096}\begin{bmatrix} 1 & 2 & 4 & 8 & 11 & 12 & 11 & 8 & 4 & 2 & 1 \\ 2 & 4 & 8 & 16 & 22 & 24 & 22 & 16 & 8 & 4 & 2 \\ 4 & 8 & 16 & 32 & 44 & 48 & 44 & 32 & 16 & 8 & 4 \\ 8 & 16 & 32 & 64 & 88 & 96 & 88 & 64 & 32 & 16 & 8 \\ 11 & 22 & 44 & 88 & 121 & 132 & 121 & 88 & 44 & 22 & 11 \\ 12 & 24 & 48 & 96 & 132 & (144) & 132 & 96 & 48 & 24 & 12 \\ 11 & 22 & 44 & 88 & 121 & 132 & 121 & 88 & 44 & 22 & 11 \\ 8 & 16 & 32 & 64 & 88 & 96 & 88 & 64 & 32 & 16 & 8 \\ 4 & 8 & 16 & 32 & 44 & 48 & 44 & 32 & 16 & 8 & 4 \\ 2 & 4 & 8 & 16 & 22 & 24 & 22 & 16 & 8 & 4 & 2 \\ 1 & 2 & 4 & 8 & 11 & 12 & 11 & 8 & 4 & 2 & 1 \\ \end{bmatrix} $$

• Select kernel size by setting the inKernel input.

SmoothImage_Gauss_Mask performed on a sample image with inKernel = _11x11.

This operation is optimized for SSE2 technology for pixels of types: UINT8, SINT16.

This operation is optimized for SSE4.1 technology for pixels of types: Kernel 11x11 UINT8.

This operation is optimized for AVX2 technology for pixels of type: UINT8.

This operation supports automatic parallelization for multicore and multiprocessor systems.

This filter can throw an exception to report error. Read how to deal with errors in Error Handling.

List of possible exceptions:

This filter is available on Basic Complexity Level.

This filter is member of SmoothImage filter group.

• SmoothImage_Mean_Mask – Smooths an image by averaging pixels within a small rectangular kernel.

• SmoothImage_Gauss – Smooths an image using a gaussian kernel.