CAJ | 학술논문

针对立体图像在雾霾环境下的质量问题，运用小波变换的多尺度特征，提出了一种雾霾环境下的立体图像增强算法，主要用于中度污染情况下的雾霾立体图像，以提高图像资源的清晰程度。该算法将原始雾霾立体图像的深度信息与多尺度小波分解相结合，在不同尺度下分解得到的小波高频子图中设置人为操控因子，调控对比度增强的强度；锐化分解后的小波低频子图边缘来突出整体轮廓。实验从PSNR指标、视觉效果和DMOS主观评价值三个方面验证了算法的成效，该方法的增强性能均好于传统的边缘锐化和四层小波变换方法，具备很好的图像边缘增强能力，细节保护能力，且与传统小波变换有相同的算法时间复杂度。
침대입체도상재무매배경하적질량문제，운용소파변환적다척도특정，제출료일충무매배경하적입체도상증강산법，주요용우중도오염정황하적무매입체도상，이제고도상자원적청석정도。해산법장원시무매입체도상적심도신식여다척도소파분해상결합，재불동척도하분해득도적소파고빈자도중설치인위조공인자，조공대비도증강적강도；예화분해후적소파저빈자도변연래돌출정체륜곽。실험종PSNR지표、시각효과화DMOS주관평개치삼개방면험증료산법적성효，해방법적증강성능균호우전통적변연예화화사층소파변환방법，구비흔호적도상변연증강능력，세절보호능력，차여전통소파변환유상동적산법시간복잡도。
This paper proposes a new image enhancement algorithm based on edge sharpening of wavelet coefficients for fog and haze stereoscopic images, using multi-scale characteristic of wavelet transform in order to improve the clarity of fog and haze stereoscopic images, which is mainly used in moderate pollution. The algorithm combines the depth of stereo-scopic images with multi-scale wavelet decomposition, setting a control factor in the high-frequency sub-graph to regulate contrast enhancement. And it highlights the overall outline through the sharpening of the low-frequency sub-graph. Experi-mental results show that whether PSNR or visual effect, or the subjective assessment of the DMOS value, the proposed method has better enhanced performance than the conventional edge sharpening and wavelet transform. And it has good image edge enhancement, details protection. Meanwhile, the proposed algorithm has the same computational complexity with wavelet transform.