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DownsampleImage
Shrinks an image by the factor of two along each axis.
Syntax
void avl::DownsampleImage ( const avl::Image& inImage, const int inScaleStep, avl::Image& outImage )
Parameters
Name | Type | Range | Default | Description | |
---|---|---|---|---|---|
inImage | const Image& | Input image | |||
inScaleStep | const int | 0 - 12 | 1 | Defines how many times the image size is divided by 2 | |
outImage | Image& | Output image |
Description
The operation shrinks the inImage reducing its dimensions by a factor of two inScaleStep times.
Remarks
The operation produces a new image by averaging four neighboring pixels from the source image repeatedly. New width and height of image are always rounded up, thus pixels from source image at last row or column are averaged in pairs or copied when corresponding dimension is odd.
This operation can be used as faster replacement for ShrinkImageNTimes.
Hardware Acceleration
This operation is optimized for SSE2 technology for pixels of type: 1xUINT8.
This operation is optimized for SSSE3 technology for pixels of type: 3xUINT8.
This operation supports automatic parallelization for multicore and multiprocessor systems.