水下光學(xué)成像圖像的典型劣化分析與仿真模擬-wenkub
2023-07-08 18:07:35 本頁(yè)面
【正文】 點(diǎn)為中心徑向逐漸減弱，即光照不均勻問題，反映在圖像上為背景灰度分布不均、輪廓灰度過度平滑的特點(diǎn)。但是在深?；蛘咭雇淼沫h(huán)境下,即使是最清的水也看不到光。這些有機(jī)物碎屑起源于海洋上部透光層的有機(jī)物生產(chǎn)活動(dòng)。后向散射是指光在水中傳播時(shí)，遇到水中懸浮顆粒向后各方向散射，造成圖像對(duì)比度下降。因此,水對(duì)光的選擇性吸收作用不僅造成光能量衰減,同時(shí)使得水下攝像物體的顏色失真。由于海水的不均勻性,衰減系數(shù)隨傳輸路徑和水溫的變化而變化,也隨著光波波長(zhǎng)的變化而變化。1 水下光學(xué)圖像劣化分析水下光學(xué)圖像在獲取過程中會(huì)出現(xiàn)圖像的劣化，主要表現(xiàn)為兩個(gè)方面：一是水下環(huán)境的影響，二是成像設(shè)備自身對(duì)成像的影響。文獻(xiàn)［6］提出了一種基于海雪現(xiàn)象模型的圖像仿真方法，研究了降低海雪微擾影響的彩色圖像復(fù)原技術(shù)。因而,對(duì)水下圖像進(jìn)行有效的改善必須建立在對(duì)水下成像系統(tǒng)的機(jī)制和特性進(jìn)行全面的研究之上。關(guān)鍵詞：水下成像；圖像劣化；劣化分析；JaffeMcGlamery模型The Degradation Analysis and Simulation of Underwater Optical ImageLI WeiXiang， CHEN Ye， YUAN Fei (Xiamen University Key Laboratory of Underwater Acoustic Communication and Marine Information Technology Xiamen 361005, China))Abstract：The effectively improvement of the underwater image must base on the research about the underwater imaging system’s mechanism and characteristics. On the basis of the analysis on the underwater optical image’s degradation types and reasons in the process of obtaining, this paper successfully simulates the deterioration characteristics such as image blur, color reduction based on JaffeMcGlamery imaging model in the shallow water and clean water situation. The result shows the location characteristics of the camera and the light source and the imaging plane, and the impact that the water forward scattering and absorption select and attenuation cause on. Meantime it reflects the deterioration characteristic caused by the device defocus and motion. The result is valuable and can be reference to the design of optical system and the image preprocess. Keywords：underwater imaging； image distortion；distortion analytics； JaffeMcGlamery model 學(xué)習(xí)好幫手0 引 言水下成像成為海洋開發(fā)和利用領(lǐng)域中極有價(jià)值的方式之一。. . . .. .水下光學(xué)圖像劣化分析與仿真模擬李維香，陳曄，
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