The study of image processing IPs for LCD TV

機構典藏 > College of Engineering > Graduate Institute & Department of Electrical Engineering > Thesis > Item 987654321/52550

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Title:	The study of image processing IPs for LCD TV
Other Titles:	液晶電視之影像處理IP研究
Authors:	連俊宏;Lien, Chun-hung
Contributors:	淡江大學電機工程學系博士班賴友仁;Lai, Eugene
Keywords:	液晶電視;色彩調整;飽和度;影像後處理;LCD TV;Picture quality;Chromatic adjustment;High dynamic range;Post processing
Date:	2010
Issue Date:	2010-09-23 17:54:43 (UTC+8)
Abstract:	在平面電視全球普及率節節攀升趨勢下，LCD TV已成為消費者第一指名購買的3C產品。而一般消費者在考慮購買前，除了品牌的形象考量外，針對硬體本身性能中，畫面呈現的整體品質是驅動消費者最主要的購買因素。故目前各大LCD TV控制晶片廠商中，皆有其各自處理畫質的核心技術。每個液晶電視區域市場中甚至是每個消費者期望電視上的色彩再現和真實色彩必定有所差異，再加上每個液晶電視因面板特性而造成色彩呈現特性不同，故喜好色調處理已成為各家液晶電視控制晶片中必備的功能。傳統的色彩調整機制中，受限於硬體的限制，無法精確的計算出色域空間的正確邊限，常在調整色調及飽和度後使像素超出色域的有效值，導致過飽和的現象，喪失了畫面原有的色彩分布細節。本論文提出一項可實現的色彩調整機制，可精確計算色域空間邊限，讓像素在調整色彩的過程中，完全不會超出色域空間，保持了畫面原有的色調分布細節。本論文針對液晶電視畫面色彩調整提出之可硬體實現的後處理調整方法，可使之具有更加豐富及逼近自然的畫面品質，較傳統方法比較更容易在液晶電視硬體中實現。喜好色調整方法經過FPGA的模擬驗證後，證實可實際在硬體上實現，這也是與以往所提出方法最大差異之處。未來更可將本論文提出方法應用至其他顯示裝置之色彩調整上以獲得更鮮豔及精確之畫面色彩。 As the increasing share of TV market, LCD TV becomes the most popular 3C product in the minds of consumers. Besides the brand name of LCD TV, the picture quality is a very important factor to determine the purchasing decision of customer. Consequently, every corporation of LCD TV chip provider has its own picture quality processing engine. In general, the picture quality processor includes a front-end filter, deinterlacing, and post color and contrast adjustment. The work in this thesis is to propose a novel chromatic adjusting scheme of LCD TV without over-saturation, which can be implemented in hardware IP or an embedded function in TV controller SOC. The color setting of every branded LCD TV is not the same due to the characteristic of LCD panel and the market location. Furthermore, every user may have his own favorite color setting. Therefore, a chromatic adjustment is necessary in the LCD TV controller. The traditional methods of chromatic adjustment suffer from the hardware cost and computing power, and hence it can’t not specify the exact boundary of color space. It usually causes over-saturation after chromatic adjustment and loses the color tone detail. In this thesis, a novel chromatic adjusting scheme without any over-saturation is proposed. By exactly calculating the boundary of color space, this scheme can generate the vivid colors and preserve more detail in high saturation area of an image frame. Unlike the traditional methods, the proposed scheme can be easily implemented in hardware IP which is suitable for integration in SOC. In this work, a novel chromatic adjusting processing scheme for LCD TV is proposed. The chromatic adjusting scheme can make the picture quality more colorful after the favorite color adjustment by the user. The image frame will have no over-saturation and preserves the image detail after this color adjusting scheme. Comparing with traditional method, this scheme can be implemented in hardware, whish means it can be easily adopted in SOC chip.
Appears in Collections:	[Graduate Institute & Department of Electrical Engineering] Thesis

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