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中文摘要：
提出了一种基于先验信息的空间碎片图像探测方法．该方法通过先验信息，在图像中碎片星像的邻域设置波门，计算波门内的局部背景阈值，辅以相关的判据识别目标．随后使用矩方法计算碎片质心相对波门中心的偏离值，通过线性平移计算碎片质心在整幅图像中的位置．实验表明：该方法复杂度低、便于实现、实时性好，可以高效、准确地探测空间碎片，比较精确地确定碎片的质心位置．
英文摘要：
A new method for detecting the space debris in image is presented. At first, a gate around the image of object is set with the prior information in this method, and the local background in the gate is calculated; and then several criterions are introduced for the threshold segmentation and object detection; at last, the distance between object and gate center is obtained with the barycenter method, and the final centroid position of object in the whole frame is obtained by a simple linear translation. To test the effect and efficiency of this method, several tests are carried out. It is demonstrated that this method is simple and convenient for application, and it works fast and robustly; the objects in image can be detected efficiently with high centroid precision.
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