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Midwave infrared (MWIR) persistent surveillance systems typically attempt to maximize coverage area leading to designs that push the limits of resolution. This places few pixels on target and can lead to performance challenges related to high spatial frequency content. This is especially true of pixel sized objects in the imagery and the potential for small apparent temperature differences between...
This paper provides a fundamental overview of important metrics and concepts regarding A/D nonlinear distortion. Once reviewed, a sub-bit compensation technique is presented, analyzed, and simulated in the context of a high-speed flash converter. A model is presented to represent the compensator as well as the pre-compensated converter. It is shown that the BEET method of error compensation creates...
In this paper, the BYPASS and PARALLEL modes of JPEG2000 are investigated and implemented in a software compression system for verification and validation. BYPASS and PARALLEL modes in JPEG2000 are options in the standard to facilitate fast compression and parallel computation for embed ded applications. Our results show minimal performance degradation in both BYPASS and PARALLEL modes, where BYPASS...
Although optimal truncation of JPEG2000 compressed imagery provides an image of the highest quality per bitrate in terms of PSNR, the algorithm is highly computationally inefficient because of the removal of compressed image sections that have been previously calculated. The proposed idea utilizes a simple quantization technique prior to Tier I coding to remove many of the coding passes from the imagery...
In this paper, an integer-based post-compression rate-distortion optimization (PCRD-Opt) algorithm for JPEG2000 rate control is presented. The distortion estimation described in the JPEG2000 standard requires non-integer processing, and the overwhelming computational burden on JPEG2000 is the distortion calculation, which is calculated for every bit of the uncompressed image. In this paper, an integer-based...
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