pixel scan 中文意思是什麼
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First, resistance to geometrical distortion was obtained by using moment normalization ; second, we focus on the phase of fourier - mellin transform. before detecting watermark, synchronization could be retrieved by using the phase information. to eliminate the influence of pixel value distortion generated during print / scan process, a dft - based robust watermark algorithm was designed, which could successfully detect watermark from a severe distorted image
另一種思路是根據圖像經過旋轉、縮放、平移后，其傅立葉?梅林變換域只有相位受到影響的特點，從其相位中提取幾何失真信息，然後再進行相應的失真補償，從而消除幾何失真的影響；對于列印掃描過程產生的像素值失真，本文也提出了一種基於dft的魯棒性演算法，能在較嚴重的圖像失真情況下，成功檢測水印。 -
We use the correlation of data between the neighbor scan lines to get the overlay pixel number, and then remove the overlay data. the bilinear interpolation method is applied to assign the pixels with the overlap data. the result shows that the data overlay phenomenon is removed, image quality is improved, and pixel value has been enhanced
此外，對于modis遙感影像中存在的邊緣區域數據重疊問題，則利用數據間的相關性計算條帶間各列像元的重疊數量，然後刪除重復部分，並經灰度重采樣后得到結果數據，實驗表明影像數據的重疊現象明顯消除，從而改善了影像的質量，增強了數據的使用價值。 -
When x - ict detects large industrial parts and requires high resolving power, image reconstruction of x - ict has huge pixel matrix and the amount of calculation increases greatly resulting in much more time of image reconstruction. this paper proposes the parallel image reconstruction based on workstations cluster to solve fast image reconstruction of high power x - ict this paper presents the relevant basic theories and principles of ict and image reconstruction, including scan mode and image reconstruction algorithm. high power x - ict which adopts powerful beeline accelerator as radial source often uses narrow fan - beam scan mode
工業ct機檢測對象為大型工業構件並且要求高解析度時，圖像重建的像素點陣巨大，計算量大大增加，從而圖像重建時間過長。本論文提出用在工作站機群上的多機并行工作的并行圖像重建解決高能x射線工業ct機的快速圖像重建問題。本論文介紹了工業ct和圖像重建的基本理論、基本原理等有關內容，包括掃描方式和圖像重建演算法。
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