NDLI: Saliency enabled compression in JPEG framework

Content Provider	IET Digital Library
Author	Rahul, Kumar Tiwari, Anil Kumar
Abstract	Under low bit-rate requirements, JPEG baseline causes compression artifacts in the image. Through this paper, a novel region-of-interest (ROI) dependent quantization method in JPEG framework is proposed. The proposed method judiciously quantizes DCT coefficients belonging to salient and non-salient regions of the image. In this work, multiple ROIs are optimally identified and ranked by using variances. The number of classes is adaptively calculated using goodness-of-segmentation. After the number of classes and their ranks are obtained, the image is divided into blocks of size 8 × 8 . These blocks may belong to more than one class and hence these are ranked based on their membership in various classes. 2D-DCT coefficients of each block are obtained and then quantized adaptively based on their ranks. Overhead for rank information of blocks is minimized by applying delta-encoding. Results are analyzed in terms of objective quality parameters and visual perception and found that the blocking artifacts in the proposed method are significantly lower than JPEG. The efficiency of the proposed method is demonstrated by results of recently published similar methods and the former is found superior in terms of quality of the reconstructed image.
Starting Page	1142
Ending Page	1149
Page Count	8
ISSN	17519659
Volume Number	12
e-ISSN	17519667
Issue Number	Issue 7, Jul (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-ipr/12/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-ipr.2017.0554
Journal	IET Image Processing
Publisher Date	2018-02-14
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	2D-DCT Coefficients Block Rank Information Compression Artefacts Computer Vision And Image Processing Technique Data Compression Delta Encoding Discrete Cosine Transform Goodness-of-segmentation Image And Video Coding Image Coding Image Nonsalient Region Image Salient Region Image Segmentation Integral Transforms JPEG Framework Low Bit-rate Requirements Objective Quality Parameter Perceptual Quality Region of Interest ROI Dependent Quantisation Method Saliency Enabled Compression Small Computational Overhead Two-dimensional DCT Coefficient Visual Perception
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering Computer Vision and Pattern Recognition Software

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

JPEG quantisation requires bit-shifts only

Accurate estimation of primary quantisation table with applications to tampering detection

Watermarking-based image authentication robust to JPEG compression

JPEG image width estimation for file carving

End-to-end double JPEG detection with a 3D convolutional network in the DCT domain

Improvement of DCT-Based Compression Algorithms Using Poisson's Equation

Image-independent optimal non-negative integer bit allocation technique for the DCT-based image transform coders

JPEG-based scalable privacy protection and image data utility preservation

Objective image quality measure for block-based DCT coding

Saliency enabled compression in JPEG framework

Similar Documents

JPEG quantisation requires bit-shifts only

Accurate estimation of primary quantisation table with applications to tampering detection

Watermarking-based image authentication robust to JPEG compression

JPEG image width estimation for file carving

End-to-end double JPEG detection with a 3D convolutional network in the DCT domain

Improvement of DCT-Based Compression Algorithms Using Poisson's Equation

Image-independent optimal non-negative integer bit allocation technique for the DCT-based image transform coders

JPEG-based scalable privacy protection and image data utility preservation

Objective image quality measure for block-based DCT coding

Saliency enabled compression in JPEG framework