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題 名 | 具有自動選取交叉點功能之乏晰化影像對比加強模式 |
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作 者 | 方寧; | 書刊名 | 中正嶺學報 |
卷 期 | 19:2 1991.01[民80.01] |
頁 次 | 頁23-33 |
分類號 | 312.1 |
關鍵詞 | 交叉點; 自動; 對比; 影像; 選取; |
語 文 | 中文(Chinese) |
中文摘要 | 乏晰理論日前已廣泛的被使用於影像加強處埋中,根據乏晰理論所提 出之乏晰運算子及對比加強運算千兩模式旨在處理影像之對比,降低其乏晰程 度,使處理後之影像品質獲得提昇。但該法需經由調整轉換函數之參數值,以反 覆交談作業方式進行,此在自動化作業中.常引起困擾。本論文提出以乏晰理論 為基礎,適用於影像加強之自動化乏晰加強模式一乏晰對應函數,此模式包括交 叉點之自動選取,初步轉換及最後轉換三們步驟。最佳之交叉點位置,可由評估 函數獲得,以決定其最大乏晰程度。在初步及最後轉換程序中,乏晰運算于計算 像元之之晰性質,對比加強運算子再根據此乏晰特性作淮一步處理。文中所得之 實驗結果將與安談式乏晰加強法、灰度統計圖均等法等方法作一分析比較。 |
英文摘要 | The concept of the fuzzy sets is applied to the problems of gray-leve] image enhancement recently.A set of fuzzifiers and contrast intensification operators are adopted for image contrast enhancement.In those techniques, several parameters of transfer function must be adjusted interactively to improvethe enhanced image quality. In this paper, we propose a Fuzzy Mapping Function (FMF) based on the concept of fuzzy setsfor image enhancement. It involves a nonparametric and unsupervised method of automatic crossoverpoint selection, primary and final transfers. An optimal crossover point is selected by the criterionfunction, namely, so as to maximize the fuzziness of gray-level. The process for both the primaryand final transfers includes the fuzzy properties extraction, contrast intensification, and defuzzification.The effectiveness of the proposed technique is illustrated using some experimental images with 32gray levels, and then the results are compared with those of interactive fuzzy enhancement methodand histogram equalization technique. |
本系統中英文摘要資訊取自各篇刊載內容。