Builds an edge map using canny edge detection.
Ported from AviSynth plugin http://bengal.missouri.edu/~kes25c/
tcanny.TCanny(clip clip[, float[] sigma=1.5, float[] sigma_v=sigma, float t_h=8.0, float t_l=1.0, int mode=0, int op=1, float gmmax=50.0, int opt=0, int[] planes=[0, 1, 2]])
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clip: Clip to process. Any planar format with either integer sample type of 8-16 bit depth or float sample type of 32 bit depth is supported.
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sigma: Standard deviation of horizontal gaussian blur. If a single
sigmais specified, it will be used for all planes. If twosigmaare given then the second value will be used for the third plane as well. -
sigma_v: Standard deviation of vertical gaussian blur.
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t_h: High gradient magnitude threshold for hysteresis.
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t_l: Low gradient magnitude threshold for hysteresis.
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mode: Sets output format.
- -1 = gaussian blur only
- 0 = thresholded edge map (2^bitdepth-1 for edge, 0 for non-edge)
- 1 = gradient magnitude map
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op: Sets the operator for edge detection.
- 0 = the operator used in tritical's original filter
- 1 = the operator proposed by P. Zhou et al.
- 2 = the Sobel operator
- 3 = the Scharr operator
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gmmax: Used for scaling gradient magnitude into [0, 2^bitdepth-1] for
mode=1. -
opt: Sets which cpu optimizations to use.
- 0 = auto detect
- 1 = use c
- 2 = use sse2
- 3 = use avx
- 4 = use avx2
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planes: Sets which planes will be processed. Any unprocessed planes will be simply copied.
tcanny.TCannyCL(clip clip[, float[] sigma=1.5, float[] sigma_v=sigma, float t_h=8.0, float t_l=1.0, int mode=0, int op=1, float gmmax=50.0, int device=-1, bint list_device=False, bint info=False, int[] planes=[0, 1, 2]])
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device: Sets target OpenCL device. Use
list_deviceto get the index of the available devices. By default the default device is selected. -
list_device: Whether to draw the devices list on the frame.
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info: Whether to draw the OpenCL-related info on the frame.
Requires Boost unless specify -Dopencl=false.
meson build
ninja -C build
ninja -C build install