Fill light for grayscale superresolution

Hong Liu; Mali Yu; Renchao JinEnmin SongGang LiLing Lin

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Fill light for grayscale superresolution

机译：Fill light for grayscale superresolution

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摘要

Quantization operation in the imaging process rounds the measured values of intensities into integers. It neglects the possible differences between the intensities having the same rounded numbers, and therefore lowers the grayscale resolution of images. Although some methods have been proposed for the reconstruction of high-grayscale resolution images from multiple subpixel-shifted low-spatial-resolution and low-grayscale-resolution images, the problems of nonsmooth transition within regions and insufficient intensity levels still exist. A grayscale super-resolution method based on fill light and a photographing apparatus are proposed to deal with the problems. The photographing apparatus can add fill lights with slightly different intensities to the captured images without changing the brightness of scenes. Our reconstruction method is based on the method of estimating a float number from several rounded integers. Then, a high-grayscale-resolution image is reconstructed from multiple low-grayscale-resolution images with slightly different intensity fill lights. Simulated data and real-world data have been used for the evaluation of the method, and the experimental results show that our method effectively improves the grayscale resolution. Besides, our method is convenient for a graphics processing unit implementation.

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来源
《Optical Engineering》 |2013年第7期|073105-1-073105-8|共8页
作者
Hong Liu; Mali Yu; Renchao JinEnmin SongGang LiLing Lin;
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作者单位

Huazhong University of Science and Technology, School of Computer Science and Technology, Wuhan, Hubei 430074, China;

Tianjin University, College of Precision Instrument and Opto-Electronics Engineering, Tianjin 300072, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类计量学;
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Fill light for grayscale superresolution

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