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High dynamic range image restoration method applied to multi-bit quantum image sensor

A high dynamic range, quantum image technology, applied in image enhancement, image data processing, instruments, etc., can solve problems such as large amount of calculation and calculation time, difficult to implement

Active Publication Date: 2021-10-22
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing dynamic threshold algorithm requires each pixel to match a threshold, and the calculation amount and calculation time are relatively large, which is difficult to implement.

Method used

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  • High dynamic range image restoration method applied to multi-bit quantum image sensor
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  • High dynamic range image restoration method applied to multi-bit quantum image sensor

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Embodiment Construction

[0056] The basic principle of a high dynamic range image restoration scheme applied to multi-bit quantum image sensors described in the present invention is as follows: multi-bit QIS has multiple thresholds, and can adjust multiple thresholds under the condition of global thresholds, so that The upper and lower limits correspond to the upper and lower limits of the input data, so that a limited number of thresholds can accurately cover the input data, so that the parts that cannot be quantified can be distinguished and the dynamic range can be improved, such as figure 1 shown. Define the number of bits of the multi-bit quantum image sensor as k, the spatial oversampling factor M, the temporal oversampling factor T, L=M*T, and the equivalent full-well capacity (Full-Well Capacity) is L*2 k-1 , the threshold The step size is σ, and the corresponding quantization result is For a set of inputs, the maximum and minimum values ​​are unique, and the corresponding quantization res...

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Abstract

The invention relates to a multi-bit quantum image sensor, and provides a method for realizing image restoration of a multi-bit quantum image sensor based on a dichotomy optimal threshold updating scheme. According to the method, the reconstruction effect of the multi-bit quantum image sensor on the high dynamic range image can be effectively improved. Therefore, according to the high dynamic range image restoration method applied to the multi-bit quantum image sensor, a plurality of threshold values are adjusted under the condition of a global threshold value by utilizing the plurality of threshold values, so that the upper and lower limits of the threshold values correspond to the upper and lower limits of input data, and a limited number of threshold values accurately cover the input data; therefore, the part which cannot be quantized can be distinguished. The method is mainly applied to design and manufacturing occasions of multi-bit quantum image sensors.

Description

technical field [0001] The invention relates to a multi-bit quantum image sensor, in particular to an image restoration method for a multi-bit quantum image sensor that realizes single-photon high dynamic range imaging based on a dichotomy threshold update scheme. Specifically, it relates to a multi-bit quantum image sensor that realizes high dynamic range image restoration. Background technique [0002] Quantum image sensors have three characteristics: single photon counting, spatial oversampling, and temporal oversampling. These characteristics make it have ultra-low readout noise, ultra-large dynamic range, ultra-high image resolution, and ultra-fast frame rate. The realization of quantum image sensors will greatly improve the quality of image acquisition in many special environments, such as Imaging in weak light environments, capturing high-speed moving objects, and high-contrast imaging have broad application prospects. [0003] Quantum image sensors are divided into...

Claims

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T5/00G06T5/90
Inventor 高志远尚宗尧高静聂凯明徐江涛
Owner TIANJIN UNIV