Compression at a very low bit rate (≤ 0.5 bpp) causes degradation in video frames with
standard decoding algorithms like H. 261, H. 262, H. 264, and MPEG-1 and MPEG-4, which …

Transform coding using the discrete cosine transform is one of the most popular techniques
for image and video compression. However, at low bit rates, the coded images suffer from …

A psychovisual experiment prescribes the quantization values in image compression. The
quantization process is used as a threshold of the human visual system tolerance to reduce …

Blocking is an annoying effect in image compression using JPEG especially at low bit-rates.
In this paper, a two-phase method is proposed for reducing JPEG blocking effects. In the first …

In this paper, a new method of image upscaling along with de-blocking of compressed
images has been presented. In the case of highly compressed images, there is a high …

During image compression, visually significant edges should be well preserved for human
perception. Despite existence of many image compression standards, joint photographic …

Adaptive post-processing filtering techniques significantly improve the perceptual quality of
decoded images by alleviating compression artifacts. However, there are still some …

In this paper, we propose a new no-reference image quality assessment for JPEG
compressed images. In contrast to the most existing approaches, the proposed method …

In this paper, a spatial technique for the reduction of blocking artifacts existing within the
highly compressed reconstructed images, has been presented. Blocking artifacts is a kind of …

Blind forensics of JPEG image tampering as a kind of digital image blind forensics
technology is gradually becoming a new research hotspot in the field of image security …