Stephen O. Otim

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Logarithmic cameras have the wide dynamic range required to image natural scenes and encode the important contrast information within the scene. However, the images from these cameras are severely degraded by fixed pattern noise. Previous attempts to improve the quality of images from these cameras by removing additive fixed pattern noise have lead to(More)
Wide dynamic range logarithmic imagers can render naturally illuminated scenes while preserving detail and contrast information at a lower cost than high dynamic range linear sensors. However, the quality of the output is severely degraded by fixed pattern noise (FPN). Although previous FPN correction techniques can eliminate the dominant additive form of(More)
The quality of the output images from high dynamic range logarithmic sensors is limited by fixed pattern noise (FPN) which is caused by device mismatches within pixels in an array. It leads to inferior image quality in comparison to images from other sensors of similar resolution. Previous design and post-chip attempts to correct this type of noise, have(More)
bstract. For wide-dynamic-range cameras that achieve a logarithic response using a load transistor operating in weak inversion, xed pattern noise is a particular problem. The effects of fixed patern noise can be reduced using one of a variety of methods that ompensate for different forms of fixed pattern noise. In choosing etween these methods, it becomes(More)
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