| 2 | 1/1 | 返回列表 |
| 查看: 457 | 回復(fù): 1 | ||
| 本帖產(chǎn)生 1 個 翻譯EPI ,點(diǎn)擊這里進(jìn)行查看 | ||
yanglanying金蟲 (正式寫手)
|
[求助]
翻譯
|
|
|
The time dimension of the video medium makes imperceptibility of data embedding more challenging compared to still images. Maintaining the distortion or peak signal-to-noiseratio (PSNR) at a consistent level across all frames of a video stream to avoid flickering is a concern when video data embedding is considered. To that respect, we recall that the MSE distortion per block to the nth frame isDn.We understand that when we minimize the average distortion over all N framesthe distortion pertinent to each frame may vary.To address the above technical concern, we consider a sub-optimal embedding approach that exploits the strongsimilarity of adjoint frames. For such frames, the transformdomain hosts have similar statistical properties. Therefore, instead of using Rx, we calculate (si, ci), i = 1, . . . , K, based on Rx,1, the autocorrelation of the host vectors of the first frame, and embed data in all frames using (si, ci), i = 1, . . . , K. Thus, real-time operation can be supported since data embedding starts right after collecting the first frame and data-embedded video can be delivered immediately. To provide consistent distortion across frames, the embedding amplitudes Ai,n for the ith message in the nth frame is scaled/adjusted by Ai,n = 1, . . . , N, which assures equal distortion per-block to each frame. We note that, if frames are similar in second-order block statistics, then Rx,1 ≈ Rx,2 ≈ . . . ≈ Rx,N ≈ Rx and sub-optimal embedding approaches global video optimal embedding. |

至尊木蟲 (著名寫手)
|
視頻中的時間維度使數(shù)據(jù)的隱蔽性嵌入比靜止圖像更具挑戰(zhàn)性。如何在視頻所有畫面中保持失真或峰值信噪比(PSNR)在一致的水平,同時避免閃爍是視頻數(shù)據(jù)嵌入過程中值得關(guān)注的問題。在這方面,我們記得,每個片段到第n畫面為止的MSE失真是Dn。我們知道,當(dāng)我們將平均失真在整個N 個畫面中降低到最小時,每個畫面相對的失真度可能會有所不同。 為了解決上述技術(shù)問題,我們利用相鄰畫面有較強(qiáng)相似性,考慮一個僅次于最優(yōu)嵌入方法。由于這樣的畫面在變換域主機(jī)有類似的統(tǒng)計(jì)特性, 因此,基于RX,1,我們計(jì)算(Si,Ci),i = 1,...,K,主機(jī)的向量的自相關(guān)第一畫面,并在所有畫面中嵌入數(shù)據(jù)使用(Si,Ci),i= 1,...,K,而不是用Rx. 這樣可以支持實(shí)時操作,因?yàn)閿?shù)據(jù)嵌入在收集第一畫面 之后就開始, 而且數(shù)據(jù)嵌入的視頻可以立即交付使用。為了提供在所有畫面中保持一樣的失真,為第n畫面中的第i個信息而嵌入振幅Ai,n經(jīng)Ai,n = 1,...,N,作為調(diào)整, 以保證每段中每幅畫面都有相同的等失真度。我們注意到,如果畫面在二階分組統(tǒng)計(jì)中相似,那么RX,1≈RX,2≈...≈RX,N≈RX僅次于最優(yōu)嵌入法與全球視頻優(yōu)化方法嵌入法接近。 |

| 2 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 085600材料與化工 求調(diào)劑 +17 | enenenhui 2026-03-13 | 18/900 |
|
|---|---|---|---|---|
|
[考研] 295材料求調(diào)劑,一志愿武漢理工085601專碩 +3 | Charlieyq 2026-03-19 | 3/150 |
|
|
[考研] 材料學(xué)碩318求調(diào)劑 +5 | February_Feb 2026-03-19 | 5/250 |
|
|
[考研] 081700化工學(xué)碩調(diào)劑 +3 | 【1】 2026-03-16 | 3/150 |
|
|
[考研] 梁成偉老師課題組歡迎你的加入 +9 | 一鴨鴨喲 2026-03-14 | 11/550 |
|
|
[考研] 一志愿天津大學(xué)化學(xué)工藝專業(yè)(081702)315分求調(diào)劑 +11 | yangfz 2026-03-17 | 11/550 |
|
|
[考研] 一志愿西安交通大學(xué)材料工程專業(yè) 282分求調(diào)劑 +5 | 楓橋ZL 2026-03-18 | 7/350 |
|
|
[考研] 286求調(diào)劑 +6 | lemonzzn 2026-03-16 | 10/500 |
|
|
[考研] 材料考研調(diào)劑 +3 | xwt。 2026-03-19 | 3/150 |
|
|
[考研] 332求調(diào)劑 +3 | ydfyh 2026-03-17 | 3/150 |
|
|
[考研] 311求調(diào)劑 +4 | 冬十三 2026-03-18 | 4/200 |
|
|
[考博] 環(huán)境領(lǐng)域全國重點(diǎn)實(shí)驗(yàn)室招收博士1-2名 +3 | QGZDSYS 2026-03-13 | 5/250 |
|
|
[基金申請] 被我言中:新模板不強(qiáng)調(diào)格式了,假專家開始管格式了 +4 | beefly 2026-03-14 | 4/200 |
|
|
[考研] 290求調(diào)劑 +3 | p asserby. 2026-03-15 | 4/200 |
|
|
[考博] 26申博 +4 | 八6八68 2026-03-16 | 4/200 |
|
|
[考研] 302求調(diào)劑 +4 | 小賈同學(xué)123 2026-03-15 | 8/400 |
|
|
[考研] 304求調(diào)劑 +3 | 曼殊2266 2026-03-14 | 3/150 |
|
|
[考研] 321求調(diào)劑 +5 | 大米飯! 2026-03-15 | 5/250 |
|
|
[考研] 070303 總分349求調(diào)劑 +3 | LJY9966 2026-03-15 | 5/250 |
|
|
[考研] 266求調(diào)劑 +4 | 學(xué)員97LZgn 2026-03-13 | 4/200 |
|