The formula shows that the deflect degree first increases , then decreases , and its maximum increases while the compress rate decreases 分析表明,斜交橋下的水流流向偏轉(zhuǎn)角度隨斜交角度的增大先增大后減小,其極大值隨壓縮比的減小而增大。
The experiments show that this algorithm surpasses those traditional coding method in compressing rate and it is competitive in speed and time with those traditional coding method 實(shí)驗(yàn)表明,這種算法在壓縮率上優(yōu)于傳統(tǒng)的算法,在編碼和解碼速度上接近于傳統(tǒng)的數(shù)據(jù)編碼方法。
H . 263 + is one of the mature standards to deal with high compress rate and strong channel error correction ability , which could be perfectly used in wireless video communication areas 面向甚低碼率的h . 263 +標(biāo)準(zhǔn)則是能較好地解決高壓縮效率和強(qiáng)信道冗錯能力的成熟標(biāo)準(zhǔn)之一,能較好地應(yīng)用于無線視頻通信領(lǐng)域。
Experimental results show when image compressing rate is high , decoded image of wavelet transform based compressing method can preserve objects outline well and has no block effect which may appear in dct block coding technique 從運(yùn)行結(jié)果可以看出,當(dāng)圖像壓縮率較高時,使用基于小波分析圖像壓縮方案的解碼圖像能保持清晰的輪廓,無dct塊編碼壓的方塊效應(yīng)。
We decompose an image through the wavelet transform functions made by us , the original image can be better restored , and the experiment of single image shows the compressing rate is 50 : 1 . the compressing efficiency is further improved 用所構(gòu)造的小波變換把圖像分解后,能比較好地恢復(fù)出原始圖像,從單幀圖像的實(shí)驗(yàn)說明壓縮比可達(dá)50 : 1 ,進(jìn)一步提高了壓縮效率。
3 ) the chosen single case turbine is suitable to satisfy the compress rate demand in the project , and if the thimble reheat take the bushing heater as the model , the simple parameter change of the bush and working path can make it reach the demand 3 )經(jīng)過選型的單級壓氣機(jī)可以滿足設(shè)計(jì)方案中對壓比的要求,其穩(wěn)態(tài)參數(shù)也符合設(shè)計(jì)值;同時,若采用與吸熱器類似的套管式回?zé)崞?,則只需要根據(jù)實(shí)際情況修正套管及工質(zhì)流道的幾何參數(shù)就可以達(dá)到設(shè)計(jì)要求。
Moreover , a newly mpeg - 4 has become mature and a necessary basic standard for the implication of streaming media . with the high compress rate , high mutual ability and flexible scalable ability ; mpeg - 4 has a bright future for use in streaming media 另一方面,新一代的音視頻壓縮標(biāo)準(zhǔn)mpeg - 4不斷走向成熟,成為視頻應(yīng)用的不可或缺的一個基礎(chǔ)標(biāo)準(zhǔn),它具有的高壓縮率、強(qiáng)交互能力和靈活分級能力,使之在網(wǎng)絡(luò)流媒體特別是視頻點(diǎn)播中擁有廣闊的應(yīng)用前景。
At present . the jpeg stationary picture compressing standard has a good compressing effect on middle and high compressing rate . but there exists a serious diamond effect at low compressing rate . on the side , jpeg standard can not very well make the needs transmitting mages by networks at low compressing rate 目前的jpeg圖像壓縮標(biāo)準(zhǔn),在中高碼率上壓縮效果較好,然而在低碼率的情況下,重構(gòu)圖像存在嚴(yán)重的方塊效應(yīng),不能很好地適應(yīng)網(wǎng)絡(luò)傳送圖像的需要。
Wavelet transformation is a new dip ( digital image processing ) technique . as its energy is more concentrated after the transformation , which contributes to the high compressed rate with good subjective and objective assessment . wavelet transformation deals with the whole image , so it can completely remove the block artifact 小波變換是一種新興的圖象處理技術(shù),它在變換域能量集中,所以在人的主觀、客觀評價良好的條件下可以獲得高壓縮比;而且這種變換是對整幅圖象進(jìn)行處理的,因此能夠從根本上消除圖象的方塊效應(yīng)。
As a conclusion , the jpeg stationary picture has a good compressing effect on middle and high bit rate , but exists a serious diamond effect at low bit rate resulting from the block - based dct scheme . so jpeg images can not very well make the needs transmitting images by networks at high compressing rate 實(shí)驗(yàn)結(jié)果表明,在一些低復(fù)雜度的應(yīng)用中, jpeg2000不可能代替jpeg ,但對于有較好的圖像質(zhì)量、較低比特率或者是一些特殊特性的要求(漸進(jìn)傳輸和感興趣區(qū)域編碼等)時, jpeg2000將是最好的選擇,從而驗(yàn)證了采用jpeg2000圖像壓縮標(biāo)準(zhǔn)的優(yōu)越性和可行性。