演講公告

演講主題：Asynchronous imaging mode for increasing satellite image resolution
主講人：劉小菁副研究員(國家實驗研究院太空計畫室)
演講日期：97年5月27日(星期二)<br>下午2:30-3:20
演講地點：(光復校區)科學一館223室
茶會時間：當天下午3:30於科學一館205室
摘要內容：
Satellite image resolution are decided by the camera CCD size and orbit altitude, especially the CCD size. images with high resolution (HR) are desired and often required. People utilize image interpolation with a single image frame for image enlargement traditionally. This causes the limitation of the image quality. To increasing the image resolution, many skills are studied and implemented, Super-resolution image reconstruct algorithm is proposed that utilizes multiple frames as additional information to estimate the high resolution image. In this presentation, another approach are surveyed—over-sampling or hyper-sampling, applying asynchronous imaging mode when satellite are taking image, to rotate satellite attitude for looking backward in the overlapping target area; interlacing the adjacent overlapping pixels by half pixel will derive the sub-pixel information; the post-processing step play an important role on the resolution increasing using this hyper-sampling approach. In this presentation, some EROS-1A images with over-sampling skill will be demonstrated for comparison and the possible approach for post-processing will be presented also.

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