Modified JPEG scheme to compress reconnaissance images

Yiwei Wang, John F. Doherty, Robert E. Van Dyck

Research output: Contribution to conferencePaper

Abstract

The JPEG standard is one of the most popular image compression schemes today. However, JPEG usually compresses the whole image equally, while in our application of air-to-ground reconnaissance images and many others, some parts of the image are much more important than the rest. Hence, it is logical to compress different parts of the image differently by trading the quality of background for improved quality of objects of interest. We develop an algorithm based on the JPEG baseline to achieve this goal. Since JPEG already uses a block-based discrete cosine transform (BDCT), we design a block classifier based on the BDCT coefficient values of the block being processed and its neighboring blocks. This approach is feasible, as our objects of interest are fabricated structures, roads, and vehicles possessing certain sizes and distinctive boundaries from the background, which follow certain patterns in the BDCT domain. We also use a projection onto convex sets (POCS) algorithm in the decoder to remove the artificial blocking effects. Therefore, we adjust the POCS procedure with respect to the classifier as well. Experimental results are given to compare the performances of the proposed scheme with the conventional JPEG scheme.

Original languageEnglish (US)
Pages1226-1230
Number of pages5
StatePublished - Dec 1 1999
EventIEEE Military Communications Conference (MILCOM 1999) - Atlantic City, NJ, USA
Duration: Oct 31 1999Nov 3 1999

Other

OtherIEEE Military Communications Conference (MILCOM 1999)
CityAtlantic City, NJ, USA
Period10/31/9911/3/99

Fingerprint

Discrete cosine transforms
Classifiers
Image compression
Air

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Wang, Y., Doherty, J. F., & Van Dyck, R. E. (1999). Modified JPEG scheme to compress reconnaissance images. 1226-1230. Paper presented at IEEE Military Communications Conference (MILCOM 1999), Atlantic City, NJ, USA, .
Wang, Yiwei ; Doherty, John F. ; Van Dyck, Robert E. / Modified JPEG scheme to compress reconnaissance images. Paper presented at IEEE Military Communications Conference (MILCOM 1999), Atlantic City, NJ, USA, .5 p.
@conference{772b5084295c4c6a9dcbbde19b35f2dd,
title = "Modified JPEG scheme to compress reconnaissance images",
abstract = "The JPEG standard is one of the most popular image compression schemes today. However, JPEG usually compresses the whole image equally, while in our application of air-to-ground reconnaissance images and many others, some parts of the image are much more important than the rest. Hence, it is logical to compress different parts of the image differently by trading the quality of background for improved quality of objects of interest. We develop an algorithm based on the JPEG baseline to achieve this goal. Since JPEG already uses a block-based discrete cosine transform (BDCT), we design a block classifier based on the BDCT coefficient values of the block being processed and its neighboring blocks. This approach is feasible, as our objects of interest are fabricated structures, roads, and vehicles possessing certain sizes and distinctive boundaries from the background, which follow certain patterns in the BDCT domain. We also use a projection onto convex sets (POCS) algorithm in the decoder to remove the artificial blocking effects. Therefore, we adjust the POCS procedure with respect to the classifier as well. Experimental results are given to compare the performances of the proposed scheme with the conventional JPEG scheme.",
author = "Yiwei Wang and Doherty, {John F.} and {Van Dyck}, {Robert E.}",
year = "1999",
month = "12",
day = "1",
language = "English (US)",
pages = "1226--1230",
note = "IEEE Military Communications Conference (MILCOM 1999) ; Conference date: 31-10-1999 Through 03-11-1999",

}

Wang, Y, Doherty, JF & Van Dyck, RE 1999, 'Modified JPEG scheme to compress reconnaissance images', Paper presented at IEEE Military Communications Conference (MILCOM 1999), Atlantic City, NJ, USA, 10/31/99 - 11/3/99 pp. 1226-1230.

Modified JPEG scheme to compress reconnaissance images. / Wang, Yiwei; Doherty, John F.; Van Dyck, Robert E.

1999. 1226-1230 Paper presented at IEEE Military Communications Conference (MILCOM 1999), Atlantic City, NJ, USA, .

Research output: Contribution to conferencePaper

TY - CONF

T1 - Modified JPEG scheme to compress reconnaissance images

AU - Wang, Yiwei

AU - Doherty, John F.

AU - Van Dyck, Robert E.

PY - 1999/12/1

Y1 - 1999/12/1

N2 - The JPEG standard is one of the most popular image compression schemes today. However, JPEG usually compresses the whole image equally, while in our application of air-to-ground reconnaissance images and many others, some parts of the image are much more important than the rest. Hence, it is logical to compress different parts of the image differently by trading the quality of background for improved quality of objects of interest. We develop an algorithm based on the JPEG baseline to achieve this goal. Since JPEG already uses a block-based discrete cosine transform (BDCT), we design a block classifier based on the BDCT coefficient values of the block being processed and its neighboring blocks. This approach is feasible, as our objects of interest are fabricated structures, roads, and vehicles possessing certain sizes and distinctive boundaries from the background, which follow certain patterns in the BDCT domain. We also use a projection onto convex sets (POCS) algorithm in the decoder to remove the artificial blocking effects. Therefore, we adjust the POCS procedure with respect to the classifier as well. Experimental results are given to compare the performances of the proposed scheme with the conventional JPEG scheme.

AB - The JPEG standard is one of the most popular image compression schemes today. However, JPEG usually compresses the whole image equally, while in our application of air-to-ground reconnaissance images and many others, some parts of the image are much more important than the rest. Hence, it is logical to compress different parts of the image differently by trading the quality of background for improved quality of objects of interest. We develop an algorithm based on the JPEG baseline to achieve this goal. Since JPEG already uses a block-based discrete cosine transform (BDCT), we design a block classifier based on the BDCT coefficient values of the block being processed and its neighboring blocks. This approach is feasible, as our objects of interest are fabricated structures, roads, and vehicles possessing certain sizes and distinctive boundaries from the background, which follow certain patterns in the BDCT domain. We also use a projection onto convex sets (POCS) algorithm in the decoder to remove the artificial blocking effects. Therefore, we adjust the POCS procedure with respect to the classifier as well. Experimental results are given to compare the performances of the proposed scheme with the conventional JPEG scheme.

UR - http://www.scopus.com/inward/record.url?scp=0033282208&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033282208&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:0033282208

SP - 1226

EP - 1230

ER -

Wang Y, Doherty JF, Van Dyck RE. Modified JPEG scheme to compress reconnaissance images. 1999. Paper presented at IEEE Military Communications Conference (MILCOM 1999), Atlantic City, NJ, USA, .