It also can carry on high - accuracy linear correction to various non - linear input signals 并能對(duì)各種非線性輸入信號(hào)進(jìn)行高精度的線性校正。
Such correction reduces the input range , the condition of linear system is fulfilled and linear correction on corresponding pixel is effective in this range 該方法通過縮小校正的輸入范圍,滿足線性系統(tǒng)成立的條件,使非線性問題線性化,實(shí)現(xiàn)了各像元點(diǎn)對(duì)點(diǎn)的線性校正。
The two - level method involves solving one small , nonlinear coarse mesh system , one oseen problem on the fine mesh and one linear correction problem on the coarse mesh 這種二層方法解一個(gè)小的,非線性的粗網(wǎng)格系統(tǒng),一個(gè)細(xì)網(wǎng)格上的oseen問題以及一個(gè)粗網(wǎng)格上的線性校正問題。
Experiments result indicates that compared with normal linear correction , the correction method features bigger system ' s dynamic range and bigger signal - noise - ratio ( 1 . 3 times ) with the reduction of standard deviation 實(shí)驗(yàn)結(jié)果表明,與常規(guī)線性校正相比,該方法不僅提高了系統(tǒng)成像的動(dòng)態(tài)范圍,而且隨著標(biāo)準(zhǔn)差的降低,信噪比相應(yīng)地提高了近1 . 3倍。
In this paper , the digital image real - time processing system was a very important part of fed driving circuit system . altera fpga chip was used to complete operation on reading and writing and timing control of fed image data . the image process algorithms mainly used gray - level transformation in the theory of image enhancement , and the algorithm realized luminance non - uniformity control , gray - level non - linear correction and automatic power control for fed 本文設(shè)計(jì)的基于fpga技術(shù)的數(shù)字圖像實(shí)時(shí)處理系統(tǒng)是fed驅(qū)動(dòng)系統(tǒng)中的重要組成部分,其核心部分采用了altera公司的fpga芯片,實(shí)現(xiàn)對(duì)fed圖像數(shù)據(jù)讀、寫操作和時(shí)序控制等,而圖像處理的算法部分主要是利用圖像增強(qiáng)技術(shù)理論中的灰度變換方法,實(shí)現(xiàn)對(duì)fed的亮度非均勻性控制、灰度非線性校正以及fed的自動(dòng)功率控制。