COMPRESSION OF HIGH DYNAMIC RANGE OF SAR IMAGES

Effective Compression of High Dynamic Range Images

There's a plenty of file formats designed for storing high dynamic range (HDR) images. But none of them provide satisfactory compression ratio and backward compatibility with existing file formats. In this paper we propose an approach to lossy compressing HDR data in a standard JPEG/JFIF file. An original HDR file is decomposed into a tone mapped version of it LDR (low dynamic range) 24bpp and ...

Lossy compression of high dynamic range images and video

Most common image and video formats have been designed to work with existing output devices, like LCD or CRT monitors. As display technology makes progress, these formats no longer represent the data that new devices can display. Therefore a shift towards higher precision image and video formats is imminent. To overcome limitations of common image and video formats, such as JPEG, PNG or MPEG, w...

Algorithms for compression of high dynamic range images and video

Adaptive Dynamic Range Reduction for SAR Images

The visualization of SAR images involves the mapping of high dynamic range amplitude values to gray levels for lower dynamic range display devices. This dynamic range reduction process determines the visibility of details in the displayed result. It is therefore an important part of SAR visualization systems. The problem of dynamic range reduction for SAR images is related to the tone mapping p...

Secure High Dynamic Range Images

In this paper, a tone mapping algorithm is proposed to produce LDR (Limited Dynamic Range) images from HDR (High Dynamic Range) images. In the approach, nonlinear functions are applied to compress the dynamic range of HDR images. Security tools will be then applied to the resulting LDR images and their effectiveness will be tested on the reconstructed HDR images. Three specific examples of secu...