Bookcover of Image Tamper Detection Using Quantization Table Estimation
Booktitle:

Image Tamper Detection Using Quantization Table Estimation

LAP LAMBERT Academic Publishing (2013-08-12 )

Books loader

Omni badge eligible for voucher
ISBN-13:

978-3-659-33569-3

ISBN-10:
365933569X
EAN:
9783659335693
Book language:
English
Blurb/Shorttext:
Most image acquisition and editing tools use the JPEG standard for image compression. Quantization table estimation is essential for establishing bitmap compression history, which is particularly useful in applications like image authentication, JPEG artifact removal, and JPEG re-compression with less distortion. The histogram of Discrete Cosine Transform DCT coefficients contains information on the compression parameters for single JPEG compressed and previously compressed bitmaps. One method proposed here is based on inspecting the peaks of the histogram of DCT to estimate quantization steps. Another, based on streamed DCT coefficients, reconstructs dequantized DCT coefficients which are then used with their corresponding compressed values to estimate quantization steps. Extending the two methods to bitmaps proves very helpful in identifying previous compression, and quantization tables if any. The estimated table is used with two distortion measures; blocking artifact, and average distortion, for inspecting possible local forgeries. The methods score poorly or fail with heavy or double compression.
Publishing house:
LAP LAMBERT Academic Publishing
Website:
https://www.lap-publishing.com/
By (author) :
Salma Hamdy
Number of pages:
132
Published on:
2013-08-12
Stock:
Available
Category:
Informatics
Price:
61.90 €
Keywords:
forgery detection, passive-blind image forensics, quantization tables, compression history

Books loader

Newsletter

Adyen::diners Adyen::jcb Adyen::discover Adyen::amex Adyen::mc Adyen::visa Adyen::cup Adyen::alipay Adyen::unionpay Adyen::paypal Paypal CryptoWallet Wire Transfer

  0 products in the shopping cart
Edit cart
Loading frontend
LOADING