色度信號調整 的英文怎麼說

中文拼音 [shǎixìnháodiàozhěng]
色度信號調整 英文
chroma amplitude ustment
  • : 色名詞[口語] (顏色) colour
  • : 度動詞[書面語] (推測; 估計) surmise; estimate
  • : 號Ⅰ名1 (名稱) name 2 (別號; 字) assumed name; alternative name3 (商店) business house 4 (...
  • 調 : Ⅰ動詞1 (配合得均勻合適) harmonize; suit well; fit in perfectly 2 (使配合得均勻合適) mix; adju...
  • : Ⅰ形容詞1 (全部在內; 完整) whole; all; complete 2 (整齊) neat; tidy; orderly Ⅱ動詞1 (整理; 整...
  • 色度 : tone; chroma; chrominance; tinct; chromaticness; chromaticity; colourity色度測量 colour measureme...
  • 調整 : adjust; tune up; trim; trimming; variation; modulation; arrangement; debug; rectification; redres...
  1. Chroma amplitude ustment

    色度信號調整
  2. In this paper, chroma dc coefficients are selected as the carrier data because chroma dc coefficients are robust. also, alterable steps are used to select one part of the coefficients, so the watermark is imperceptible ; before watermark embedding, the watermark is divided into many parts, every part is individually embedded into one gop of the video, even if a gop is destroyed, the watermark can be extracted correctly, this methods promotes the robustness of the watermark ; in addition, in order to promote the security of the watermark, the user ' s id and password are used to generate chaos sequence by the chaos system which is created in this paper, later, watermark is mixed by the chaos sequence. also, the embedding position of the watermark bit is modified by one chaos sequence, so, unauthorized person can not extract or remove the watermark, since the embedding position is unknown

    本文認為,dc系數是魯棒性非常好的參數,因而選擇dc系數作為水印息載體,同時,採用可變的步長選擇部分系數,保證了水印的隱形性;在嵌入水印時,本文採用水印息「網格劃分」 、各子塊獨立嵌入視頻的方案,由於水印息子塊是相對獨立的嵌入視頻中的每一相對獨立的圖組當中,即使某一圖組收到一定破壞,也能夠恢復水印息,使水印的健壯性得到提高;此外,為了提高水印息的安全性,在嵌入水印息時,根據用戶輸入的id和密碼,利用本文構造的混沌系統產生的混沌序列對水印息進行變換,同時,對每一水印息比特的嵌入位置也採用了偽隨機序列進行調,這樣,未授權用戶不能提取水印息,也難以擦除其中的水印息,因為嵌入的位置是未知的。
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