Hongjian You

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Edge detection in Synthetic Aperture Radar (SAR) images has been a challenging task due to the speckle noise. Ratio-based edge detectors are robust operators for SAR images that provide constant false alarm rates, but they are only optimal for step edges. Edge detectors developed by the phase congruency model provide the identification of different types of(More)
You Hongjian, Shao Yun, Li Shukai (Laboratory of Remote Sensing Information Sciences, Institute of remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101) Abstract: Airborne infrared scanning image is often distorted due to the change of the airplane’s attitude and position. Therefore, ground control points must be used to rectify the raw(More)
The Scale-Invariant Feature Transform (SIFT) algorithm and its many variants have been widely used in Synthetic Aperture Radar (SAR) image registration. The SIFT-like algorithms maintain rotation invariance by assigning a dominant orientation for each keypoint, while the calculation of dominant orientation is not robust due to the effect of speckle noise in(More)