backprojection 中文意思是什麼
backprojection
解釋
反向投射-
The filtered backprojection ( fbp ) is the most widely used algorithm currently
濾波反投影法（ filteredbackprojection ）是目前應用得最為廣泛的一種ct圖像重建演算法。 -
The system makes impedance measurements using an array of 32 electrodes on the surface of the body, and reconstructs the images using a veighted backprojection algorithm
該系統採用32體表電極進行阻抗測量，用加權反投影演算法進行圖象重構。 -
The concept, advantages and history of bistatic isar are introduced first in this paper, then 2 - d turntable imaging of monostatic isar the special example of bistatic isar is studied. on the basis of monostatic isar four imaging algorithms are analyzed, including fft algorithm, filtered backprojection algorithm, spectrum extrapolation algorithm and esprit algorithm, and compared in the small and big angel of imaging. on the basis of monostatic imaging the 2 - d turntable imaging principle of bistatic isar is studied,
本文首先闡述了雙站逆合成孔徑雷達的概念、優點和發展歷程，然後研究了雙站逆合成孔徑雷達的特例? ?單站逆合成孔徑雷達對轉臺目標的二維成像演算法，並在此基礎上分析了四種主要的轉臺成像演算法， fft演算法、濾波逆投影演算法、譜外推演算法和esprit演算法，並對以上各種演算法分別在小角度和大角度下的成像性能進行了比較。 -
The corresponding image formation algorithms, both in tune domain and frequency domain, are introduced. beginning with the projection reconstruction theory, convolution - backprojection and its approximated algorithm, backprojection algorithm are given
根據這一投影重建理論，導出了impsar目標投影重建的卷積-反投影演算法及其近似演算法-反向投影演算法。 -
The modified b - p, wb - p, is very efficient for the complicated application scenario, such as impsar, gpr, where the imaging system moves along a fluctuated path. a wb - p fast algorithm, named pure backprojection ( pb - p ), is presented
提出了一種快速b - p演算法，純反向投影演算法（ pb - p ） ，分析與成像實驗均證明了所提出的演算法較之b - p演算法在性能上有很大的提高。 -
And so the method whichhas the same quality as filtered backprojection algorithm, used the properties of wavelet to reconstruct a local region of the cross section of a body, using almost completely local data, and could reduce noise of the image
經過理論分析和數值模擬，本文提出的基於可分離mra去噪小波重建演算法、基於不可分離mra的小波重建演算法和基於不可分離mar的去噪小波重建演算法，都有一定的創新性和實用性。 -
For convolution - backprojection algorithm used in x - ct ， it is very important to select the interpolation method of data. by theoretical analysis and computer simulation, author finds the improvement in quality of image reconstruction can be achieved with right selection of interpolating method of data
對卷積后投影再建演算法中數據的內插進行了討論，通過理論研究和計算發現，選用合適的內插方法可以有效地提高再建像的質量，準確判斷病變。 -
This algorithm not only have the charicristic of local reconstruction that could reduce the amount of x - ray exposure and computations in reconstruction, but could reduce the noise in the conditions of keep same image quality as reconstructed in the filter - backprojection algorithm as well
這種演算法具有局部重建特性，從而降低了x射線的輻射劑量和演算法的運行時間，在保證和傳統的濾波反投影法具有基本相同的圖像重建質量的條件下還具有一定的去噪性能。 -
The method uses the properties of wavelet to reconstruct a local region of the cross section of a body, using almost completely local data, therefore reduces the amount of exposure and computations in reconstruction, while has the same quality as filtered backprojection algorithm
利用小波的特性，該演算法僅使用幾乎是完全局部的投影數據去重建身體剖面上的某個局部區域，從而大大降低了x射線的輻射劑量和演算法的運行時間，同時還具有和傳統的濾波反投影法基本相同的圖像重建質量。 -
This thesis developed an algorithm to reconstruct the wavelet coefficients of an image from the radon transform data. this algorithm is similar to the conventional filtered backprojection algorithm, except that the filters are now angle dependent, and the backprojection gives us the wavelet coefficients of the reconstruction, which are then used to synthesize the reconstruction
該演算法與傳統的濾波反投影法相似，不同的地方在於，演算法中用到的濾波器是與x射線的照射角度相關聯的，而且反投影后得到的是待建圖像的小波分解系數，這些系數再經過逆小波變換就得到了最終的重建圖像。 -
In this paper, firstly, we studied the newly working in the field of the application of wavelets transform used - in the computer tomography in two - dimesion, and mainly focused in the field of filter - backprojection algorithm. we analized the application of one - demision wavelets transform and two - demision wavlets transform
本文首先對小波理論在二維圖像重建應用的最新研究進行分析，著重研究了了小波理論在濾波反投影演算法中的具體演算法，分別從一維小波變換和二維小波變換進行了探討。
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