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图像特征的类型通常指边界、角点(兴趣点)、斑点(兴趣区域)。角点就是图像的一个局部特征,应用广泛。harris角点检测是一种直接基于灰度图像的角点提取算法,稳定性高,尤其对L型角点检测精度高,但由于采用了高斯滤波,运算速度相对较慢,角点信息有丢失和位置偏移的现象,而且角点提取有聚簇现象。 Use the FeatureDetector interface in order ... 阅读全文
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Mat OpenCV C++ n-dimensional dense array class The class Mat represents an n-dimensional dense numerical single-channel or multi-channel array. It can be used to store real or complex-valued ve... 阅读全文
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DataType A primitive OpenCV data type is one of unsigned char, bool,signed char, unsigned short, signed short, int, float, double, or a tuple of values of one of these types, where all the values ... 阅读全文
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引入Recently SVMs using spatial pyramid matching (SPM) kernel have been highly successful in image classification. Despite its popularity, these nonline... 阅读全文
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convolutionFirst, we want to compute σ(Wx(r,c) + b) for all valid (r,c) (valid meaning that the entire 8x8 patch is contained within the image; this i... 阅读全文