本文關(guān)鍵詞： 自動圖像分割 前景關(guān)鍵點 局部形狀匹配 星形形狀先驗 剪影風格化　出處：《北京交通大學》2017年碩士論文　論文類型：學位論文

【摘要】：圖像分割是計算機視覺、模式識別和數(shù)字圖像處理領(lǐng)域的熱點研究問題。圖像分割可分為交互式分割和自動分割兩大類別。近年來,交互式分割雖然取得了很大的進展,但是處理大量圖片時存在操作復雜、耗時耗力、對交互區(qū)域敏感等問題,因此自動分割方法受到研究者的廣泛關(guān)注。為此,本文設(shè)計了一種自動圖像分割算法,通過顯著性檢測算法和局部形狀匹配算法自動檢測前景的關(guān)鍵點,并將其應用到星形先驗分割算法中,從而實現(xiàn)了圖像的自動分割。本文主要內(nèi)容和創(chuàng)新點如下:(1)前景關(guān)鍵點的提取對圖像自動分割起決定性作用。為了自動標記圖像前景,提出了一種基于局部形狀匹配的前景關(guān)鍵點提取方法。該方法采用局部形狀匹配來自動標記前景,并與基于顯著性檢測的前景標記方法相結(jié)合,能檢測出更多的前景關(guān)鍵點,有利于后續(xù)的自動分割。(2)分割時結(jié)合形狀先驗知識能提高圖像分割的準確性。星形形狀是一種普適的先驗知識,適用于自然界中的很多物體。本文實現(xiàn)了一種結(jié)合多星形形狀先驗的Graph Cuts分割算法,有效地提高了分割質(zhì)量。(3)將提出的圖像自動分割算法應用于圖像的特效處理中,提出了一種基于樣例的圖像剪影風格化算法。該算法在圖像分割的基礎(chǔ)上,對前景和背景采取不同的色調(diào)處理策略,使生成的圖像具有與樣例圖像類似的風格。實驗結(jié)果驗證了方法的有效性。
[Abstract]:Image segmentation is a hot research problem in the field of computer vision, pattern recognition and digital image processing. Image segmentation can be divided into two categories: interactive segmentation and automatic segmentation. Although great progress has been made in interactive segmentation, there are some problems such as complicated operation, time-consuming and labor-consuming, sensitive to interactive region, etc., so automatic segmentation method has been widely concerned by researchers. In this paper, an automatic image segmentation algorithm is designed, which detects the key points of the foreground automatically by the salience detection algorithm and the local shape matching algorithm, and applies it to the star prior segmentation algorithm. The main content and innovation of this paper are as follows: 1) extraction of foreground key points plays a decisive role in automatic image segmentation. In order to automatically mark the image foreground. This paper presents a method of extracting the key points of foreground based on local shape matching, which uses local shape matching to mark the foreground automatically, and combines with the foreground marking method based on salience detection. It can detect more foreground key points and can improve the accuracy of image segmentation by combining shape priori knowledge with subsequent automatic segmentation. Star shape is a kind of universal prior knowledge. It is suitable for many objects in nature. In this paper, a Graph Cuts segmentation algorithm combining multi-star shape priori is implemented. The proposed automatic image segmentation algorithm is applied to the special effect processing of the image. An image silhouette stylization algorithm based on sample is proposed. Based on image segmentation, different hue processing strategies are adopted for foreground and background. The generated image has a similar style to the sample image. The experimental results show that the method is effective.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP391.41

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