使用openCV在图像中实现SIFT

问题描述

我试图用openCV实现SIFT，我已经参考了这些链接和

U can find useful information about SIFT parameters in the OpenCV implementation here: http://docs.opencv.org/modules/nonfree/doc/feature_detection.html

计算关键点：

vector<KeyPoint> keypoints;
detector->detect(yourImage, keypoints);

计算关键点时，其方向会自动计算，并与每个关键点的参数角度相关联关键。请在此处找到更多信息：

When you compute the keypoints its orientation is automatically calculated and is associated with the parameter 'angle' of each keypoint. Please find more info here: http://docs.opencv.org/modules/features2d/doc/common_interfaces_of_feature_detectors.html

计算关键点的描述符：

Mat descriptors;
extractor->compute(yourImage, keypoints, descriptors);

是Mat描述符的每一行描述符。

being each row of the Mat descriptors one descriptor.

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希望这有帮助。

Please let me know if you have questions!Hope this helps.

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