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      <li><a href="Shader.html#Shader.sobel_fast">sobel_fast() (in module Shader)</a>
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      <li><a href="Shader_gpu.html#Shader_gpu.sobel_gpu">sobel_gpu() (in module Shader_gpu)</a>
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      <li><a href="Shader.html#Shader.split_channels">split_channels() (in module Shader)</a>
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      <li><a href="Shader.html#Shader.split_channels_inplace">split_channels_inplace() (in module Shader)</a>
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      <li><a href="BurstSurface.html#BurstSurface.surface_split">surface_split() (in m