Experimental results show that the proposed method can achieve better performance than the fixed threshold histogram method 實驗結果表明其性能優于廣泛采用的固定閾值膚色檢測方法。
Some normalization methods are discussed in detail , including histogram method , expectation - variance method and trend surface analysis 這里詳細介紹了各種測井數據標準化的方法原理,并給出了相應的實例。
Compared with the fixed threshold histogram method used widely , this method can find optimal thresholds to the different complex backgrounds 相對于固定閾值的直方圖檢測方法,該算法可以針對不同的圖像內容產生相應的最優分割閾值。
The fast wavelet entropy technique for image indexing to reduce the complexity of the wavelet histogram method is suggested which can improve the retrieval performance 提出了快速小波熵的圖像檢索技術以減少小波直方圖技術的計算復雜性并提高了檢索速度。
In chapter 3 , a new method , which called general histogram method , is presented . the performance of this new method is proved much better than the normal histogram method 接著在第三章中給出了一個新的基于廣義圖像的廣義直方圖檢索算法,實驗結果表明新的算法相對于傳統的直方圖方法在檢索輸出精度上有較大提高。
Comparing with other segmentation methods , differential histogram method is more practical to get defect information in the glass - shells . after the defects are extracted , the glass - shells are classified based on the shape of defects by pattern recognition methods 玻殼缺陷分割出來后,對包含缺陷的玻殼采用了基于形狀參數以及模板匹配方法來判斷玻殼缺陷的類別。
It is known that if there is defection on the glass - shell , it must be identified exactly . in order to extract the defect , some image segmentation methods are studied , such as differential histogram method , otsu method , and histogram method 為了將氣泡及劃痕等缺陷從圖象中分割出來,本文研究了玻殼圖象的分割方法,包括微分直方圖法、 otsu法、直方圖法,最終選用微分直方圖法來分割圖象。
( 2 ) the three numeric methods , including formula method , histogram method and feature vector method , of calcucation invariant probability distribution for chaotic map is derived , and their characteristics are discussed each other , these results of the computer simulation are in agreement with those of theoretic analysis . ( 3 ) the principles and methods of chaotic communication are reviewed and commented systematically . first , several main chaotic synchronization methods are discussed , then the methods and ways of chaotic communication are explored , including analogue chaotic communication , digital chaotic communication and direct chaotic communication . this is the article basis , and it startes from follow - up case study 所做的工作總結如下: ( 1 )綜述了混沌現象及其理論的相關問題并對碼分多址通信系統的擴頻地址編碼與混沌序列、混沌同步與系統保密性等問題作了討論; ( 2 )研究了計算混沌映射不變分布的三種數值方法,即:公式法、直方圖法以及特征向量法,并比較了各自的優缺點,計算機模擬結果與理論分析結果相符。