Column noise elimination method of a quantum image sensor based on a guide filter

A guided filter and quantum image technology, applied in the field of image processing, can solve the problem of reducing the quality of QIS imaging and achieve the effect of eliminating column noise
CN109872274APending Publication Date: 2019-06-11TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2019-06-11

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Abstract

The invention discloses a column noise elimination method of a quantum image sensor based on a guide filter. The method comprises the following steps: filtering a QIS single-frame image containing column noise by using a one-dimensional guide filter under a first set parameter, and separating a high-frequency component in the QIS single-frame image from an image smooth part to obtain a high-frequency component of the QIS single-frame image; Performing guided filtering on the high-frequency component by using the one-dimensional guided filter under a second set parameter, and separating columnnoise in the high-frequency component from a predetermined image smooth part to obtain a required noise component; And calculating a column mean value of the obtained noise components to obtain a column noise vector, and subtracting the column noise vector from the sensor output image to obtain a de-column noise image. The method has a good removal effect on the non-fixed column stripe noise of the QIS, and the algorithm is fast and effective.
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Description

technical field

[0001] The invention relates to the technical field of image processing, in particular to a column noise elimination method of a quantum image sensor based on a guiding filter. Background technique

[0002] Quantum image sensor (QIS) has three characteristics: single photon counting, spatial oversampling, and temporal oversampling. Compared with the classic CMOS image sensor, the pixel called "jot" of QIS has sub-diffraction limit, high conversion gain, and low full well capacity, so QIS should have ultra-low readout noise, ultra-large dynamic range, ultra-high Excellent image resolution and ultra-fast frame rate, so it will greatly improve the quality of image acquisition in many special environments, such as low-light environment imaging, high-speed moving object capture, high-contrast imaging, etc., and has broad application prospects.

[0003] In the actual QIS imaging system, QIS adopts the circuit structure of large array oversampling and column readou...

Claims

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