Department of Information and Communication Engineering, Korea Advanced Institute of Science and Technology, Seoul 130-012, Korea.
IEEE Trans Image Process. 1998;7(2):229-34. doi: 10.1109/83.661000.
A postprocessing algorithm is proposed to reduce the blocking artifacts of Joint Photographic Experts Group (JPEG) decompressed images. The reconstructed images from JPEG compression produce noticeable image degradation near the block boundaries, in particular for highly compressed images, because each block is transformed and quantized independently. The blocking effects are classified into three types of noises in this paper: grid noise, staircase noise, and corner outlier. The proposed postprocessing algorithm, which consists of three stages, reduces these blocking artifacts efficiently. A comparison study between the proposed algorithm and other postprocessing algorithms is made by computer simulation with several JPEG images.
提出了一种后处理算法，以减少联合图像专家组（JPEG）解压图像的块效应伪像。JPEG 压缩产生的重建图像在块边界附近会出现明显的图像降级，尤其是对于高度压缩的图像，因为每个块都是独立变换和量化的。在本文中，将块效应分为三种噪声类型：网格噪声、阶梯噪声和角外点噪声。所提出的后处理算法由三个阶段组成，可以有效地减少这些块效应伪像。通过对几个 JPEG 图像的计算机模拟，对所提出的算法与其他后处理算法进行了比较研究。
