Image Quality Evaluation of HJ--1 Satellite CCD Sensor
环境一号卫星CCD影像质量评价研究

The quality of the images obtained by the CCD sensor onboard HJ--1 satellite is evaluated and analyzed in two aspects of image project quality and image application quality. By comparing the result with that of the same temporal Landsat TM image, the quality of the images from the CCD sensor onboard HJ--1 satellite is evaluated objectively. The image project quality evaluation is carried out in three aspects of statistical feature, texture feature and energy feature. The result shows that HJ-1 CCD images can exhibit the shapes, details and textures of objects. The image application quality evaluation is carried out by using HJ-1 CCD images to extract the urban vegetation information in Beijing. The result shows that its information extraction accuracy is better and its total classification accuracy is up to 84.45% which is suitable for the extraction of unban vegetation information.