Shack–Hartmann centroid detection method based on high dynamic range imaging and normalization techniques
نویسندگان
چکیده
منابع مشابه
High Dynamic Range Imaging
High dynamic range (HDR) images and video contain pixels, which can represent much greater range of colors and brightness levels than that offered by existing, standard dynamic range images. Such “better pixels” greatly improve the overall quality of visual content, making it appear much more realistic and appealing to the audience. HDR is one of the key technologies of the future imaging pipel...
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High-dynamic range imaging from space in the visible, aiming in particular at the detection of terrestrial exoplanets, necessitates not only the use of a coronagraph, but also of adaptive optics to correct optical defects in real time. Indeed, these defects scatter light and give birth to speckles in the image plane. Speckles can be cancelled by driving a deformable mirror to measure and compen...
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Most imaging sensors have a limited dynamic range and hence can satisfactorily respond to only a part of illumination levels present in a scene. This is particularly disadvantageous for omnidirectional and panoramic cameras since larger elds of view have larger brightness ranges. We propose a simple modi cation to existing high resolution omnidirectional/panoramic cameras in which the process o...
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IN this lecture note, we describe high dynamic range (HDR) imaging systems; such systems are able to represent luminances of much larger brightness and, typically, also a larger range of colors than conventional standard dynamic range (SDR) imaging systems. The larger luminance range greatly improve the overall quality of visual content, making it appears much more realistic and appealing to ob...
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High dynamic range imaging methods that combine multiple exposures involve a number of processing details, such as frame alignment, motion artifact removal, and pixel data weighting. When applied to astronomical scenes, these steps require additional consideration. Specifically, motion blur artifacts must be corrected by techniques that are tolerant of saturated pixels, successive image frames ...
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ژورنال
عنوان ژورنال: Applied Optics
سال: 2010
ISSN: 0003-6935,1539-4522
DOI: 10.1364/ao.49.002409