"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 10, 2016

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Studies on superresolution image sensor

A. Y. Grishentcev 1, A. G. Korobeinikov 2, I. B. Bondarenko 2

1 Saint Petersburg National Research University of Information Technologies, Mechanics and Optics

2 Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences

The paper is received on September 16, 2016

Abstract. Potential methods and facilities of registration of radiation is growing. There are specific requirements for the detectors of optical radiation: high sensitivity and resolution. The most complex biological receiver of optical radiation is the human eye. Many ophthalmologists believe that a healthy eye is in constant motion, as if feeling the object of consideration. This leads to increasing of spatial resolution. Due to eye movements it is possible to form a dynamic image containing the spatial increment of the luminance and chrominance stare at the object. This dynamic image is an analogue of the derivative which is computed along a trajectory equivalent to the trajectory of the eyes motion. The latest research and development in the field of digital detectors of optical radiation show that one of the urgent tasks is to increase the spatial resolution. At the same time, increasing of spatial resolution by decreasing the linear dimensions of the pixels of the image sensor is complicated by the fact that reducing the size of the useful area of the pixel decreases the sensitivity of the matrices and, respectively, of the useful signal-to-noise ratio. Thus, the problem of improving of spatial resolution while preserving the linear size of the pixels is actual. It is proposed to increase the resolution of optical receivers due to the formation of a sequence of shifted frames and their further conversion. The goal of the transformation is the image recovery of  high resolution (super-resolution).

The article discusses the ways to achieve super-resolution image sensors due to the formation and subsequent processing of a sequence of shifted images. The article contains: the mathematical apparatus of realization, methods and tools for physical implementation, the simulation of the proposed method in MATLAB, given a program listing and an example of the results of the program.

Finally, it contains conclusions and references.

Keywords: superresolution, image sensor, single-pixel camera, deconvolution, digital signal processing.


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