Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 86 for “"JPEG"”.
-
Nonattribution Properties of JPEG Quantization Tables
… as quantization table and huffman table, of the JPEG encoding. Having done research on around 110, 000 images, we reached to state that "For all practical purposes, using quantization and huffman tables alone to predict a camera make and model isn't a viable approach". We found no correlation …
-
Rate control and bit allocations for JPEG transcoding
An image transcoder that produces a baseline JPEG file from a baseline JPEG input is developed. The goal is to produce a high quality image while accurately meeting a filesize target and keeping computational complexity-especially the memory usage and number of passes at the input image--low. …
-
Analysis of M-JPEG video over an ATM network
… quantitative and qualitative analysis of Motion JPEG video transmitted over a constrained Asynchronous Transfer Mode (ATM) network. Bandwidth profile analysis for various types of video points out the impracticality of ATM bandwidth and cell delay management algorithms for mainstream video …
-
An improved file carver of intertwined jpeg images using X_myKarve
… data recovery fail. However, carving fragmented JPEG files are not easy to solve due to the complexity of determining the fragmentation point. In this research, X_myKarve’s framework is introduced to address the fragmentation issues that occur in JPEG images. The framework consists of six steps …
-
Analysis of MHPDM algorithm for data hiding in JPEG images
In the recent years, there has been a great deal of interest in developing a secure algorithm for hiding information in images, or steganography. There has also been a lot of research in steganalysis of images, which deals with the detection of hidden information in supposedly natural images. The …
-
An investigation into the parallel implementation of JPEG for image compression
… develops a parallel algorithm to implement the JPEG standard for continuous tone still picture compression to be run on a group of transputers. The processor-farm paradigm is adopted. This research shows this to be the best paradigm for use with the JPEG baseline algorithm on the measured …
-
A study of probability distributions of DCT coefficients in JPEG compression
The Discrete Cosine Transform (DCT) used in JPEG compression has shown excellent energy compaction properties that rival that of the ideal Karhunen-Loeve Transform. Lossy compression in JPEG is achieved by distorting 8x8 block DCT coefficients through quantization. It has been shown in literature …
-
The evaluation of chest images compressed with JPEG and wavelet techniques
… with common lung diseases and compressed with JPEG and wavelet techniques at various ratios. Twelve board-certified radiologists were recruited to perform two types of experiments. In the first part of the experiment, presence of lung disease, confidence of presence of lung disease, severity of …
-
A new approach for jpeg fragmentation point detection using sequential difference by segment (SDbS)
… commonly restored files. However, in some cases, JPEG images may be fragmented when stored in the hard disk and it makes it difficult to repair them due to the complexity of determining the fragmentation points. In this research, a technique called Sequential Difference by Segment (SDbS) has been …
-
Reassembly and clustering bifragmented intertwined jpeg images using genetic algorithm and extreme learning machine
… evidence data from computer disk drives. Today, JPEG image files are popular file formats that have less structured contents which make its carving possible in the absence of any file system metadata. However, completely recovering intertwined Bifragmented JPEG images into their original form …
-
Study of joint embedding and compression on JPEG compression scheme using multiple codebook data hiding
… technique using multiple codebook design on JPEG-85 compression scheme. The application of the above technique is compared with the Type III data embedding techniques using single codebook design. The comparison is carried out in tenns of the parameters such as mean square error and …
-
JPEG-like Image Compression using Neural-network-based Block Classification and Adaptive Reordering of Transform Coefficients
… digital-image-compression schemes such as JPEG. Coefficient reordering; that directly affects the symbol statistics for entropy coding, and therefore the effectiveness of entropy coding; is investigated. Adaptive zigzag reordering, a novel versatile technique that achieves efficient …
-
Quantitative performance measures of color transformations in hybrid vector scalar quantization
… applications, as well as image compression via JPEG, JPEG 2000, and Hybrid Vector Scalar Quantization Compression (HVSQ) methods. The objective is to utilize color spaces to optimize HVSQ compression, thereby enabling it to supersede such compression standards as JPEG and JPEG 2000. So in order …
-
Compression artifact suppression for color images with dual-domain SE-ARResNet
JPEG compression has been a popular lossy image compression technique and is widely used in digital imaging. Restoring high-quality images from their compressed JPEG counterparts, however, is an ill-posed inverse problem but could be of great use in improving the visual quality of images. With the …
-
Investigation of the effects of image compression on the geometric quality of digital protogrammetric imagery
… data between various devices and applications. JPEG image compression standard is one alternative for carrying out the image compression task. This standard was formed under the auspices ISO and CCITT for the purpose of developing an international standard for the compression and decompression …
-
Comparison of data hiding using LSB and DCT for image
… DCT technique, various BMP image is converted to JPEG image. Then data is hidden into the JPEG cover image using DCT technique. After that, the JPEG stego image is converted back to BMP stego image. These BMP stego images from LSB and DCT are compared using PSNR. Results from these experiments …
Page 1 of 5