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Considering the simplicity and fast training speed of Haar-like features, the high detecting precision of HOG features, a combined method is proposed on the basis of the two features. Several rectangular features which can describe local human characteristics based on original features are added. The combined method can retain the precision of HOG features and increase the speed of detection at the...
In iris recognition, eyelash occlusions will reduce the accuracy of iris recognition, an algorithm of eyelash occlusions detection based on endpoint identification is proposed in this paper. By analyzing the structural characteristics of eyelashes, this algorithm identifies the endpoints of eyelashes projection in the outer circularity of iris, and finally uses a sector region to represent the eyelash...
To satisfy the demand of the real-time computer vision system, a method of camera calibration was analysed. According to the camera model from OpenCV(Intel Open Source Computer Vision Library), with radial aberration and tangential aberration considered, Zhang's arithmetic of camera calibration was applied. As the experimental result showed, the arithmetic exerted OpenCV library function at a great...
Numerous studies have reported that the time-series terrestrial parameters such as the Normalized Difference Vegetation Index (NDVI), Leaf Area of Index (LAI), Fraction of Absorbed Photosynthetic Active Radiation (FPAR), derived from NOAA/AVHRR, SPOT/VEGETATION, TERRA or AQUA/MODIS, have played significant roles in researching the global environment, terrestrial ecosystems and related ecological researches...
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