zero-order image 中文意思是什麼
zero-order image
解釋
零級像-
Summarize the common image pre - processing methods and point out their merits and faults. discuss the boundary effect of gaussian low - pass filtering ( glpf ). to improve it, the zero - order gaussian filtering for an open profile ( gfo ) is used
討論了高斯低通濾波的邊界效應，利用零階開環高斯濾波演算法，對高斯低通濾波進行了改進，使濾波圖像在圖像大小不改變的情況下，邊緣處的濾波效果得到明顯的改善。 -
So this part is dealt with separately. dcpm method is employed to improve the quality of image coding with making full of the relativity of the wavelet coefficients. according to the different importance degree and vision character of the high frequency wavelet coefficients, different thresholds are applied to remove small coefficients ; then mannos module are applied to remove the visual redundancy ; in order to produce more zero - tree, horizontal and vertical wavelet coefficients are transformed accordingly to improve the compression ratio
對于小波變換后的小波系數的高頻部分，根據其分佈特性和人眼的視覺特性，採用視覺模型對零樹量化過程的閾值進行修正，有效地去除視覺冗餘；對各高頻子圖採用多級樹集合分割的零樹編碼方法，有效地利用系數編碼剩餘符號，進一步提高壓縮比。 -
In digital holography, the off - axis setup ca n ' t make effective use of the pixels of a ccd camera because of the necessity for carrier fringe. and the size of the reconstructed image is also limited by the presence of zero - order and conjugate image in off - axis digital holography
數字全息中，由於記錄介質ccd的有限解析度，同軸數字全息較離軸數字全息有更多的優點，它可以有效利用ccd的像元個數，擴大再現像的視場，提高再現像的解析度，更適合記錄小尺度三維物體。 -
Second, some algorithms of elimination of the conjugate image and the zero - order image are introduced and summarized. at the end of this chapter, the experimental setup of in - line phase - shifting digital holography is described. chapter3 : digital holographic recording and numerically reconstructing process is interpreted as a coherent optical imaging system
第二章論述了同軸相移數字全息基本原理，總結和介紹了消除零級像和共軛像的幾種相移演算法，並較為詳細地介紹了同軸相移數字全息的實驗裝置。
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