專(zhuān)業(yè)英語(yǔ)-imageandtelev-文庫(kù)吧資料
2025-01-12 14:36本頁(yè)面
【正文】 ages。 In remote sensing imagery it is well known that there may be significant correlation between different bands of multispectral data. 眾所周知，在遙感圖像中，在不同頻譜的多譜數(shù)據(jù)之間可能存在顯著的相關(guān)性。 These lossless techniques are generally called entropy coding techniques, and have application in document imaging, desktop publishing, and GIS. 這些非損失性技術(shù)通常稱(chēng)為熵編碼技術(shù)并已經(jīng)在檔案圖像、桌面出版和地理信息系統(tǒng)上得到應(yīng)用。 If ten pixels in the original image have a value of 10, then the same data may be represented as a data value, 10, and a multiplier saying how many times the value is repeated before a changed value. 如果原始圖像中的 10個(gè)像素值為 10，那么相同的數(shù)據(jù)可被表示成同一數(shù)值： 10，并且一個(gè)乘法器將指出該值在改變之前重復(fù)了多少次。 One lossless technique is known as run length encoding. 有一種非損失性壓縮技術(shù)稱(chēng)為行程編碼。 In fact, for some landsat scenes with urban areas and many small farms, the factor of 2 bits per pixel may not be able to achieved. 實(shí)際上，對(duì)于很多農(nóng)場(chǎng)的鄉(xiāng)村衛(wèi)星圖像，用各像素 2位的系數(shù)就不能夠?qū)崿F(xiàn)。 No matter what technique that you use, the exact rate is very dependent on the plexity of the image that you are analyzing. 無(wú)論你采用什么技術(shù)，準(zhǔn)確的壓縮率室依靠于你所分析的圖像的復(fù)雜程度的。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。 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。 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(guò)原始圖像各像素所需壓縮的比特?cái)?shù)來(lái)確定。 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。 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?huà)質(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。Specialized English on Telemunication Yang XiaoQing Key terms Picture element。 the smallest resolved area in a video scanning technique Pixel Shade 顏色深淺，漸變 Histogram 直方圖 Reassign 再分配 A portion of a TV signal, transmitted by
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