影像增強的方法及其影像處理裝置與電腦程式產品METHOD FOR IMAGE ENHANCEMENT, IMAGE PROCESSING APPARATUS AND COMPUTER READABLE MEDIUM USING THE SAME

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

14/522,595

專利證號

US 9,552,625 B2

專利獲證名稱

影像增強的方法及其影像處理裝置與電腦程式產品METHOD FOR IMAGE ENHANCEMENT, IMAGE PROCESSING APPARATUS AND COMPUTER READABLE MEDIUM USING THE SAME

專利所屬機關 (申請機關)

國立交通大學

獲證日期

2017/01/24

技術說明

一種影像增強的方法及其影像處理裝置與電腦程式產品。此方法係先接收及放大低解析度影像，以產生具有多個第一畫素的放大影像。針對放大影像進行邊緣偵測處理，以取得各第一畫素的邊緣資訊，其中各邊緣資訊包括邊緣方向及邊緣強度，各邊緣方向包括總和為固定值的水平及垂直分量。強化放大影像的非邊緣區域，以產生高解析度細節影像；利用鈍化遮罩銳利化法，根據各邊緣方向的水平及垂直分量，強化已低通濾波的放大影像的邊緣區域，以產生高解析度邊緣影像。根據各邊緣強度，融合高解析度邊緣影像與高解析度細節影像，以產生超解析度影像。 A method, image processing apparatus, and computer readable medium for image enhancement are provided. In the method, a low-resolution image is received and upscaled to generate an upscaled image having first pixels. Edge detection is performed on the upscaled image to obtain edge information of the first pixels. Each piece of the edge information includes an edge direction and an edge intensity, and each of the edge directions includes a horizontal and vertical component having a constant summation. A non-edge region of the upscaled image is enhanced to generate a high-resolution detail image; based on unsharp masking sharpening methods, an edge region of the low-passed upscaled image is enhanced according to the horizontal and vertical components of the edge directions to generate a high-resolution edge image. Image fusion is performed on the high-resolution edge image and the high-resolution detail image according to the edge intensities to generate a super-resolution image.

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