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1.10(beta)
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Darwin
1.10(beta)
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Specialized histogram for quantized 3-channel colour values (e.g., RGB). More...
Public Member Functions | |
| drwnColourHistogram (double pseudoCounts=1.0, unsigned channelBits=3) | |
| constructor | |
| drwnColourHistogram (const drwnColourHistogram &histogram) | |
| copy constructor | |
| ~drwnColourHistogram () | |
| destructor | |
| size_t | size () const |
| returns histogram size | |
| void | clear () |
| clear the histogram counts | |
| void | clear (double pseudoCounts) |
| clear the histogram and assign a new prior | |
| const char * | type () const |
| returns object type as a string (e.g., Foo::type() { return "Foo"; }) | |
| drwnColourHistogram * | clone () const |
| returns a copy of the class usually implemented as virtual Foo* clone() { return new Foo(*this); } | |
| bool | save (drwnXMLNode &xml) const |
| write object to XML node (see also write) | |
| bool | load (drwnXMLNode &xml) |
| read object from XML node (see also read) | |
| void | accumulate (unsigned char red, unsigned char green, unsigned char blue) |
| accumulate an RGB colour sample More... | |
| void | accumulate (const cv::Vec3b &colour) |
| accumulate a cv::Vec3b colour sample | |
| void | accumulate (const cv::Scalar &colour) |
| accumulate a cv::Scalar colour sample | |
| double | probability (unsigned char red, unsigned char green, unsigned char blue) const |
| return probability of an RGB colour sample | |
| double | probability (const cv::Vec3b &colour) const |
| return probability of a cv::Vec3b colour sample | |
| double | probability (const cv::Scalar &colour) const |
| return probability of a cv::Scalar colour sample | |
| cv::Mat | visualize () const |
| visualization | |
| const double & | operator[] (size_t indx) const |
 Public Member Functions inherited from drwnWriteable | |
| bool | write (const char *filename) const |
| write object to file (calls save) | |
| bool | read (const char *filename) |
| read object from file (calls load) | |
| void | dump () const |
| print object's current state to standard output (for debugging) | |
Protected Attributes | |
| unsigned | _channelBits |
| number of bits for each colour channel | |
| unsigned char | _mask |
| mask for channel bits | |
| double | _pseudoCounts |
| psuedo counts for dirchelet prior | |
| vector< double > | _histogram |
| the histogram counts (with interpolation) | |
| double | _totalCounts |
| sum of histogram counts | |
Specialized histogram for quantized 3-channel colour values (e.g., RGB).
The following example shows how to construct a colour histogram for all pixels in a given image: /code cv::Mat img = cv::imread("testImage.jpg", CV_LOAD_IMAGE_COLOR);
// construct histogram for the image drwnColourHistogram histogram;
for (int y = 0; y < img.rows; y++) { for (int x = 0; x < img.cols; x++) { histogram.accumulate(img.at<const Vec3b>(y, x)); } }
// display the histogram drwnShowDebuggingImage(histogram.visualize(), string("histogram"), true);
| void drwnColourHistogram::accumulate | ( | unsigned char | red, |
| unsigned char | green, | ||
| unsigned char | blue | ||
| ) |
accumulate an RGB colour sample
1.8.6