Method for describing target detection area features based on merging between first order and second order
A target detection and area feature technology, applied in the field of image processing, can solve problems such as unsuitable target types, single target detection area, etc.
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[0027] In order to describe the content of the present invention conveniently, some existing terms are defined first.
[0028] HOG: The core idea of the HOG (Histogram of Oriented Gradient) descriptor is that the appearance and shape of an object in an image can be well described by the pixel intensity gradient or the direction distribution of the edge. The implementation method is to first divide the image into small connected regions called grid cells; then collect the gradient direction or edge direction histogram of each pixel in the grid cell; finally combine these histograms to form a feature descriptor.
[0029] SIFT feature descriptor: SIFT (Scale-Invariant Feature Transform, scale-invariant feature transformation) feature is a local descriptor based on scale space, which is invariant to image translation, scaling, and rotation, and is invariant to illumination changes, affine transformations, and projections. All have good robustness, so they are widely used. Calcu...
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