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Threshold< SrcValueType, DestValueType > Class Template Reference |  |
#include <vigra/transformimage.hxx>
Public Types | |
| typedef SrcValueType | argument_type |
| typedef DestValueType | result_type |
Public Member Functions | |
| result_type | operator() (argument_type s) const |
| Threshold (argument_type lower, argument_type higher, result_type noresult, result_type yesresult) | |
Detailed Description
template<class SrcValueType, class DestValueType>
class vigra::Threshold< SrcValueType, DestValueType >
Threshold an image.
Note: Nowadays, it is probably easier to perform thresholding by means of C++ 11 lambda functions or array expressions.
If a source pixel is above or equal the lower and below or equal the higher threshold (i.e. within the closed interval [lower, higher]) the destination pixel is set to 'yesresult', otherwise to 'noresult'.
Traits defined:
FunctorTraits::isUnaryFunctor is true (VigraTrueType)
Usage:
#include <vigra/transformimage.hxx>
Namespace: vigra
vigra::BImage src(width, height), dest(width, height);
...
vigra::transformImage(src.upperLeft(), src.lowerRight(), src.accessor(),
dest.upperLeft(), dest.accessor(),
vigra::BImage::PixelType, vigra::BImage::PixelType>(10, 100, 0, 255));
Required Interface:
SrcValueType src;
DestValueType dest, yesresult, noresult;
dest = ((src < lower) || (higher < src)) ? noresult : yesresult;
Member Typedef Documentation
| typedef SrcValueType argument_type |
the functor's argument type
| typedef DestValueType result_type |
the functor's result type
Constructor & Destructor Documentation
| Threshold | ( | argument_type | lower, |
| argument_type | higher, | ||
| result_type | noresult, | ||
| result_type | yesresult | ||
| ) |
init thresholds and return values
Member Function Documentation
| result_type operator() | ( | argument_type | s | ) | const |
calculate transform
The documentation for this class was generated from the following file:
- vigra/transformimage.hxx