Medical electrical equipment . characteristics of electro - optical x - ray image intensifiers . part 7 : determination of the modulation transfer function 醫(yī)療用電氣設(shè)備.電光x射線圖象增強(qiáng)儀特性.第7部分:調(diào)制轉(zhuǎn)換功能的測定
Image recording system consisting of a radiographic film , intensifying screens and a film cassette for use in medical diagnostics ; evaluation of modulation transfer function 由射線攝影膠片增感屏和膠片盒組成的圖象記錄系統(tǒng)
Medical electrical equipment - characteristics of electro - optical x - ray image intensifiers - part 7 : determination of the modulation transfer function iec 61262 - 7 : 1995 ; german version en 61262 - 7 : 2001 醫(yī)療電氣設(shè)備.電光x射線圖像增強(qiáng)器的特性.第7部分:調(diào)
By using knife edge as object , and cmos sensor as device for image analyzing , we get edge spread function from the image and use differential operation and fft to obtain modulation transfer function of the lens , then its image quality is known 以刀口作為目標(biāo)物,以cmos作為圖像分析器件,從圖像中獲取刀口函數(shù),經(jīng)微分和fft運(yùn)算,得到成像鏡頭的mtf (調(diào)制傳遞函數(shù)) ,從而得知其成像品質(zhì)。