in this thesis some nonlinear color-scale morphological filter are designed to filter some noised color images and detect the color edge of image based on max lift decomposition scheme . and the performance index is presented, which implies that the new color-scale morphological filter has better performance 在本論文中,我們基于最大提升格構(gòu)造出非線性彩色形態(tài)濾波器,并對一些受污染的彩色噪聲圖像進(jìn)行濾波和進(jìn)行一些彩色圖像邊緣檢測的工作,所構(gòu)造出來的彩色形態(tài)濾波其具有較好的濾波效果。
for shape modeling and detection, a shape representation algorithm based on morphological shape decomposition is proposed . based on the decomposition scheme, we construct a fuzzy attributed relational graph by learning from training examples as the shape model . a hierarchical part-based shape detection algorithm is developed based on such a model 在形狀建模和檢測的研究中,提出了一種基于形態(tài)學(xué)形狀分解的形狀描述算法;在此基礎(chǔ)上,通過樣本學(xué)習(xí),得到模糊關(guān)系屬性圖作為形狀模型;根據(jù)該模型,提出了一種基于部分的層次式形狀檢測方法。
fractal coding has been proved useful for image compression . it is also proved effective for content-based image retrieval . in the paper, we present a block-constrained fractal coding scheme and a matching strategy for content-based image retrieval . in this coding scheme, an image is partitioned into non-overlap blocks of a size close to that of a query iconic image . fractal codes are generated for each block independently . in the similarity measure of fractal codes, an improved nona-tree decomposition scheme is adopted to avoid matching the fractal codes globally in order to reduce computational complexity . our experimental results show that our coding scheme and the matching strategy we adopted is useful for image retrieval, and is compared favorably with other two methods tested in terms of storage usage and computing time 分形編碼在圖像壓縮方面取得了很好的效果,同時,分形編碼也能夠用于基于內(nèi)容的圖像檢索.本文提出了一種基于塊限制的分形編碼算法和匹配策略,并將它們用于圖像檢索.在我們編碼算法中,圖像會被預(yù)先分成互相不重疊的子圖像塊,然后對這些子圖像進(jìn)行獨立地分形編碼,從而獲得整幅圖像的分形碼.該編碼算法能夠在很大程度上減少編碼時間.在進(jìn)行圖像間相似性的匹配時,我們采用改進(jìn)的基于九叉樹的分配策略,從而避免全局地進(jìn)行分形碼的匹配,減少了計算量.實驗結(jié)果說明,我們的編碼算法和匹配策略能夠比較有效地應(yīng)用于基于內(nèi)容的圖像檢索,在計算時間和存儲時間上都優(yōu)于實驗中其它兩種方法
the inconsistent excitation can be decomposed into a series of irregular incident waves in terms of the spectral decomposition scheme of the hermitian matrix, with which the coherency function of the ground motions under the inconsistent excitation can be obtained numerical results are given to show its stability and rationality 該方法將隨機(jī)輸入下的波動分析問題轉(zhuǎn)換為多個虛擬激勵下的確定性波動分析組合問題,從而可以方便地獲得場地波動觀測量之間的譜密度矩陣,進(jìn)而計算給出工程場地的地震動相干函數(shù)本文還用數(shù)值模擬的辦法對所提出方法的合理性和穩(wěn)定性進(jìn)行了探討。