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Fixed Algorithm usage example #1904

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This commit is contained in:
Andrey Kamaev 2012-05-17 10:52:07 +00:00
parent 8f3273bf07
commit 0ba3236ce0
1 changed files with 5 additions and 4 deletions
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9
modules/core/doc/basic_structures.rst
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@ -2324,6 +2324,7 @@ The class provides the following features for all derived classes:
Here is example of SIFT use in your application via Algorithm interface: :: Here is example of SIFT use in your application via Algorithm interface: ::
#include "opencv2/opencv.hpp" #include "opencv2/opencv.hpp"
#include "opencv2/nonfree/nonfree.hpp"
... ...
@ -2334,22 +2335,22 @@ Here is example of SIFT use in your application via Algorithm interface: ::
FileStorage fs("sift_params.xml", FileStorage::READ); FileStorage fs("sift_params.xml", FileStorage::READ);
if( fs.isOpened() ) // if we have file with parameters, read them if( fs.isOpened() ) // if we have file with parameters, read them
{ {
sift.read(fs["sift_params"]); sift->read(fs["sift_params"]);
fs.release(); fs.release();
} }
else // else modify the parameters and store them; user can later edit the file to use different parameters else // else modify the parameters and store them; user can later edit the file to use different parameters
{ {
sift.set("contrastThreshold", 0.01f); // lower the contrast threshold, compared to the default value sift->set("contrastThreshold", 0.01f); // lower the contrast threshold, compared to the default value
{ {
WriteStructContext ws(fs, "sift_params", CV_NODE_MAP); WriteStructContext ws(fs, "sift_params", CV_NODE_MAP);
sift.write(fs); sift->write(fs);
} }
} }
Mat image = imread("myimage.png", 0), descriptors; Mat image = imread("myimage.png", 0), descriptors;
vector<KeyPoint> keypoints; vector<KeyPoint> keypoints;
sift(image, noArray(), keypoints, descriptors); (*sift)(image, noArray(), keypoints, descriptors);
Algorithm::get Algorithm::get