專業(yè)英語(yǔ)-imageandtelev-文庫(kù)吧
2024-12-22 14:36 本頁(yè)面
【正文】 emoved Persistence Front end of a TV receiver that selects desired station Tuner Extremely highQ filters often used in TV and radar applications Surface acoustic wave filters HighQ band stop circuit that attenuates a narrow band of frequencies Wavetrap Trap Another name for wavetrap Blackandwhite TV Monochrome Passage B pression/depression techniques Numerous methods have been developed for the pression of digital image data. 對(duì)于數(shù)字圖像數(shù)據(jù)的壓縮，人們已經(jīng)研究出大量的方法。 One of the principal drivers for this development is the television industry where quality image data must be transferred to receivers using relatively simple equipment. 主要?jiǎng)恿χ痪褪潜仨殞⒏弋嬞|(zhì)圖像數(shù)據(jù)用相對(duì)簡(jiǎn)單的設(shè)備傳送給接收機(jī)的電視。 The development of high definition television is further focusing the attention of industry and university scientists toward problems of data reduction and digital transmission. 高清晰度的電視的發(fā)展正進(jìn)一步吸引工業(yè)界和研究人員致力于數(shù)據(jù)壓縮和數(shù)字傳播的研究。 The principal evaluation criteria for the analysis of pressed versus unpressed imagery is whether a person can tell the difference between the images. 評(píng)價(jià)壓縮圖像和未壓縮圖像的主要標(biāo)準(zhǔn)是人們是否能區(qū)分它們。 A more implemental measure is the Root Mean Square (RMS) error between the original image and the image that has been pressed. 更有效的度量方法則是原始圖像與壓縮圖像之間的均方根差。 Compression rates may be generated by determining the size of the pressed image in terms of number of bits per image pixel for the original image. 決定壓縮圖像尺寸的壓縮比可以通過原始圖像各像素所需壓縮的比特?cái)?shù)來(lái)確定。 Here we only considers pression of single high resolution multispectral images. 在此，先只考慮單個(gè)高分辨率多譜圖像的壓縮。 Higher pression rates will be achieved in a motion sequence where frame to frame variations may be quantified and only the changes from a reference image need be coded. 更高的壓縮比可從運(yùn)動(dòng)序列的一幀到另一幀的變化量化獲得，并且只對(duì)參考圖像的變化部分進(jìn)行編碼。 There are two general types of pression: (1)lossless, and (2) loss. Lossless pression means that you can achieve a certain pression factor and be able to exactly reproduce the original image. 通常有兩種壓縮方法：非損失性壓縮和損失性壓縮。非損失性壓縮意味著能產(chǎn)生某個(gè)壓縮系數(shù)并可以完全復(fù)現(xiàn)原始圖像。 Loss pression on the other hand allows some loss, but has the potential for much higher pression rate
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