An efficient technique for storage of two-tone images

Moinuddin, Athar Ali; Khan, E.; Farid, Ghulam

doi:10.1109/30.642401

Cited by 5 publications

(6 citation statements)

References 5 publications

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“…One is a skip-line decoder [18,22] with more parallelism. The other is an optimized H.264 decoder with less parallelism.…”

Section: Resultsmentioning

confidence: 99%

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Unified UDispatch: A User Dispatching Tool for Multicore Systems

Hsueh

2011

J. Comput. Sci. Technol.

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In multicore environment, multithreading is often used to improve application performance. However, even in many simple applications, the performance might degrade when the number of threads increases. Users usually impute this phenomenon to the overhead of creation or termination of threads. In our observation, how the threads are dispatched to the multiple cores might have a more significant effect. We formally defined the problems on using threads as multithreading anomalies, and presented a novel user dispatching mechanism (UDispatch) which provides controllability in user space to improve application performance. Through modification of application source codes with the UDispatch application programming interface (API), the application performance can be improved significantly. However, since the application source codes might not be available or it might be too complicated to modify application source codes, we provided an extension, called UDispatch + , to dispatch threads without any modification of application source codes. In this paper, the UDispatch and UDispatch + are integrated and wrapped for more portability and introduced as a tool called Unified UDispatch (UUD) with more detailed experiments and description. It can dispatch the application threads to specific cores at the discretion of users with up to 171.8% performance improvement on a 4-core machine.

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“…One is a skip-line decoder [18,22] with more parallelism. The other is an optimized H.264 decoder with less parallelism.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, we also experiment UUD through multimedia applications, because of their multithreading nature, e.g., a skip-line [18] codec with more parallelism and an H.264 decoder with less parallelism. The skipline encoding is one of the lossy encoding techniques for binary images.…”

Section: Introductionmentioning

confidence: 99%

Unified UDispatch: A User Dispatching Tool for Multicore Systems

Hsueh

2011

J. Comput. Sci. Technol.

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“…A good number of image compression methods has been proposed by different researchers based on techniques like dividing image into blocks [1,2,3,4,5,6,7], compressions based on edge detection [8,9], chain coding [10,11], skip line encoding [12,13] etc. These methods exploit the spatial redundancy or correlation between pixels in the image.…”

Section: Related Workmentioning

confidence: 99%

“…Skip-n-line encoding is proposed by A.A. Moinuddin, et al [12] in 1997. If there is a high degree of correlation between successive scan lines, then there is no need to code each of them.…”

Section: Skip Line Encodingmentioning

confidence: 99%

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Image Compression with Modified Skipline Encoding and Curve Fitting

Sadanandan¹,

Govindan²

2013

IJCA

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High quality digitized images have always been subject to high correlation: high image quality equals large file size. Image Compression is an important issue in Internet, mobile communication, digital library, digital photography, multimedia, teleconferencing and other applications. Application areas of Image Compression would focus on the problem of optimizing storage space and transmission bandwidth. Here a lossy method for image compression based on skip line encoding and curve fitting is proposed. Proposed approach involves two major processing steps: a lossless modified skip line encoding process to eliminate redundant scan lines in the image, and a lossy curve fitting based encoding for further redundancy elimination. The degree of compression is controlled based on the amount of loss that is affordable for applications making use of Peak Signal to Noise Ratio (PSNR) measure in the decision. The results obtained with the combined, modified skip line encoding and curve fitting approach, are analyzed in terms of compression ratio and PSNR. The approach provides improvements in compression ratio for all the tested images. The results obtained were found to be better than a state-of-the-art method in the literature.

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A skip-line with threshold algorithm for binary image compression

Sung

Kuo

2010

2010 3rd International Congress on Image and Signal Processing

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An efficient technique for storage of two-tone images

Cited by 5 publications

References 5 publications

Unified UDispatch: A User Dispatching Tool for Multicore Systems

Unified UDispatch: A User Dispatching Tool for Multicore Systems

Image Compression with Modified Skipline Encoding and Curve Fitting

A skip-line with threshold algorithm for binary image compression

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