drewcassidy/nvidia-texture-tools
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Some progress with polyphase filters.

Browse Source
This commit is contained in:
castano
2007-11-28 05:04:16 +00:00
parent b1da728f93
commit 3ea9d12676
4 changed files with 283 additions and 207 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
src/nvimage/Filter.h
View File

@ -25,7 +25,7 @@ namespace nv
Kaiser, // Kaiser-windowed sinc filter
Num
};
float (*function)(float x);
float support;
};
@ -49,9 +49,9 @@ namespace nv
return w;
}
NVIMAGE_API void initFilter(Filter::Enum filter);
NVIMAGE_API void initFilter(Filter::Enum filter, int samples = 1);
NVIMAGE_API void initSinc(float stretch = 1);
NVIMAGE_API void initKaiser(float alpha = 4.0f, float stretch = 1.0f);
NVIMAGE_API void initKaiser(float alpha = 4.0f, float stretch = 1.0f, int sampes = 1);
NVIMAGE_API void initMitchell(float b = 1.0f/3.0f, float c = 1.0f/3.0f);
NVIMAGE_API void debugPrint();
@ -85,18 +85,49 @@ namespace nv
NVIMAGE_API void initEdgeDetection();
NVIMAGE_API void initSobel();
NVIMAGE_API void initPrewitt();
NVIMAGE_API void initBlendedSobel(const Vector4 & scale);
private:
const uint w;
float * data;
};
// @@ Implement non linear filters:
// Kuwahara filter
// Median filter
/// A 1D polyphase kernel
class PolyphaseKernel
{
public:
NVIMAGE_API PolyphaseKernel(float width, uint lineLength);
NVIMAGE_API PolyphaseKernel(const PolyphaseKernel & k);
NVIMAGE_API ~PolyphaseKernel();
float valueAt(uint column, uint x) const {
return m_data[column * m_size + x];
}
float width() const {
return m_width;
}
uint size() const {
return m_size;
}
uint length() const {
return m_length;
}
NVIMAGE_API void initFilter(Filter::Enum filter, int samples = 1);
NVIMAGE_API void initKaiser(float alpha = 4.0f, float stretch = 0.5f);
NVIMAGE_API void debugPrint();
private:
const float m_width;
const uint m_size;
const uint m_length;
float * m_data;
};
} // nv namespace