Title: Blocking artefact detection in block-based DCT compressed images

Authors: Jagroop Singh; Sukhwinder Singh; Dilbag Singh; Moin Uddin

Addresses: Faculty Department of Electronics and Communication Engineering, DAVIET, Jalandhar 144001, Punjab, India. ' Faculty Department of Computer Science and Engineering, UIET, Chandigarh 160014, Punjab, India. ' Faculty Department of Instrumentation and Control Engineering, Dr. B.R. Ambedkar NIT, Jalandhar 144001, Punjab, India. ' Faculty Dr. B.R. Ambedkar NIT, Jalandhar 144001, Punjab, India; Delhi Technical University, Delhi, India

Abstract: The perceived quality of images reconstructed from low bit rate compression is severely degraded by appearance of transform coding blocking artefacts. It is of interest to be able to numerically assess the degree of blocking artefacts as it plays an important role in the design, optimisation and assessment of image and video coding systems. The proposed algorithm is based on new modelling function for blocking artefact detection in compressed images. Our experiment results show that the proposed method exhibits satisfactory performance as compared to other post-processing method|s/techniques and is very efficient and stable since the signal need not be compressed/decompressed.

Keywords: block discrete cosine transform; bit rate; blocking artefacts; image compression; JPEG; image quality; modelling; blocking artefact detection; post-processing; compressed images.

DOI: 10.1504/IJSISE.2011.043773

International Journal of Signal and Imaging Systems Engineering, 2011 Vol.4 No.3, pp.181 - 188

Received: 23 Sep 2010
Accepted: 24 Mar 2011
Published online: 13 Mar 2015 *

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