內(nèi)容簡介：
碩士學(xué)位論文 醫(yī)用X線圖像處理技術(shù)研究與實(shí)現(xiàn)，正文共72頁。
【摘要】 隨著微電子技術(shù)及大規(guī)模集成電路的發(fā)展,對模擬信號的數(shù)字化處理被越來越多的應(yīng)用到各種電氣設(shè)備中。FPGA技術(shù)更是近些年來數(shù)字處理上應(yīng)用的比較多的技術(shù)。本課題正是利用現(xiàn)在比較流行的FPGA技術(shù)結(jié)合電視技術(shù)對數(shù)字化后的X射線透視圖像的視頻信號進(jìn)行數(shù)字處理。其中,用FPGA實(shí)現(xiàn)了對視頻信號的負(fù)像、鏡像、實(shí)時(shí)降噪處理、掃描制式變換以及多幀圖像存儲等功能。本課題提出了一種多重遞歸復(fù)合降噪的新算法。該方法是在傳統(tǒng)的單一遞歸降噪方法上加以改進(jìn)而成的。實(shí)驗(yàn)結(jié)果表明,采用本方法實(shí)現(xiàn)的X線電視系統(tǒng),在降噪系數(shù)調(diào)節(jié)時(shí),圖像的降噪效果以及運(yùn)動拖尾的變化都沒有跳變的感覺。這樣在實(shí)際使用中很容易找到降噪效果和運(yùn)動拖尾的矛盾結(jié)合點(diǎn),為醫(yī)生的工作帶來了很大方便,大大提高了診斷效率。
【Abstract】 With the large-scale integrated circuits and microelectronic technology development, the number of analog signal processing has been an increasing number of applications to various electrical devices. FPGA is being used more among digital processing technology in recent years. In this subject, the more popular FPGA technology combined with digital television technology is utilized for the processing of the video signal of the X-ray perspective image after digitalization. The negative, mirror, multi-frame storage, as well as real-time processing such as noise reduction features of the video signal has been realized with using of FPGA. The subject presents a novel complex multi-recursive noise reduction algorithm. This method is improved based on the traditional single-recursive noise reduction method. The experiment results showed that when X-ray television system based on this method is regulated noise reduction coefficient, the effects of noise reduction, as well as movement of the tail of the image did not generate the feeling of transition. In practice, doctors can be easily found the best combination of the effect of noise reduction and the conflict of the movements trailing. It makes the work of doctors convenience and greatly enhanced the efficiency of diagnosis.
【關(guān)鍵詞】 FPGA； 圖像處理； 降噪；
【Key words】 FPGA； image processing； noise reduction；
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