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The MSR (Multi-Scale Retinex) image enhancement algorithm can produce best performance in most cases, but the computation load is very huge especially for large image. In this paper, an efficient approach is proposed to accelerate MSR image enhancement speed on GPU via CUDA (Compute Unified Device Architecture). Time consuming modules such as multi-scale Gaussian filter, logarithmic domain differencing...
Accurate scatter correction is especially important for high-resolution 3D PETs due to the lack of inter-slice septa. To address this problem, a fully 3D iterative scatter-corrected OSEM in which a 3D single scatter simulation (SSS) is alternatively performed with a 3D OSEM reconstruction until convergence was recently proposed. However, due to the computational complexity of both SSS and OSEM algorithms...
Photometric stereo algorithms are used in many applications for the 3D reconstruction of scenes from a number of 2D images, illuminated by calibrated light sources of different directions. However, the widely used assumption that the direction of the light remains constant across all pixels of the image usually induces reconstruction errors. We propose here a `dense' photometric stereo algorithm that...
Processing of human faces finds application in various domains like law enforcement and surveillance, entertainment (interactive video games), information security, smart cards etc. Several of these applications are interactive and require reliable and fast face processing. A generic face processing system may comprise of face detection, recognition, tracking and rendering. In this paper, we develop...
Image/video spatial resolution upconversion aims to obtain a high resolution output from the original low resolution input. Fast resolution upconversion is desired in many applications. In this paper, we develop a GPU-friendly two-pass directional image/video resolution upconversion algorithm and present a GPU implementation of the method, using the NVIDIA CUDA (Compute Unified Device Architecture)...
A novel and efficient Synthetic Aperture Radar (SAR) processor is introduced in this paper. This new processor is implemented on the Graphics Processing Unit (GPU). GPU is traditionally used for graphics rendering, but in recent years, it has rapidly evolved as a highly-parallel processor with tremendous computation capability and ultra-high memory bandwidth. The algorithm of the new SAR processor...
With the advancement of sensor technology, the image resolution of optical satellites improves, increasing image size in the process. For satellite imagery mosaic composition, the task of performing colour balancing becomes more intensive due the sheer size of data needed to be processed. In order to reduce the processing time for color balancing, the proposed procedure takes advantage of the graphics...
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