Image compression in local helioseismology

Data Compression for Helioseismology

MEDICAL IMAGE COMPRESSION: A REVIEW

Within recent years the use of medical images for diagnosis purposes has become necessity. The limitation in transmission and storage space also growing size of medical images has necessitated the need for efficient method, then image Compression is required as an efficient way to reduces irrelevant and redundancy of the image data in order to be able to store or transmits data. It also reduces...

Local Prediction for Lossless Image Compression

In predictive coding a group of neighboring picture elements is used to select a suitable prediction value for a current pixel. In this paper, we propose two techniques for lossless images compression based on predictive coding. In the rst technique which called, the predictors, we replace each pixel in the image by the predicted pixel; we use various schemes to predict the value of a pixel. In...

Local Mixing near the Solar Core, Neutrino Fluxes and Helioseismology

We have computed solar models similar to those published in Richard, Vauclair, Charbonnel, Dziembowski (1996), in which we have added local mixing near the solar core in order to decrease the neutrino production. The results show that the neutrino fluxes are reduced as expected (although not enough to account for the observed values), but the obtained models are incompatible with the inversion ...

Use of Local Minimization for Lossless Gray Image Compression

A novel approach for the lossless compression of gray images is presented. A prediction process is performed followed by the mapping of prediction residuals. The prediction residuals are then split into bit–planes. Twodimensional (2D) differencing operation is applied to bitplanes prior to segmentation and classification. Performing an Exclusive-OR logic operation between neighboring pixels in ...