CCD camera strength-fluctuation correlation imaging method

Abstract

The invention relates to a CCD camera strength-fluctuation correlation imaging method. A CCD camera collects and stores photon number information inducted by all target exposure pixel units, exposure time is divided into a plurality of short time windows according to the chronological order, photon number statistic analysis is carried out on all the pixel units based on the time windows, and the photon number within the exposure time, the statistical average of corresponding information values and the sum and fluctuation in each time window are calculated. The stored information of the pixel units is divided into a positive set and a negative set according to the photon number relative to the average. The correlation or fluctuation correlation of the photon number is calculated in each window between two (selective) different pixel units of the CCD within the exposure time, normalized light strength correlation or fluctuation correlation between two pixel units is calculated on this basis, and then the image of a target is obtained based on the thermal light correlation imaging theory and method. The obtained image of the target can resist atmosphere turbulence disturbance, and has the resolution ratio of calorescence quantum ghost imaging and the contrast ratio close to 100 percent or the contrast ratio of 100 percent.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, and relates to a CCD camera intensity-fluctuation correlation imaging method capable of obtaining high-resolution, high-contrast and anti-atmospheric turbulence disturbance images without using a large-aperture lens. Background technique [0002] In remote sensing, astronomy, reconnaissance, guidance, scientific research, production and daily life, photography is the basic means of obtaining images. However, in many practical situations and application environments, the image is blurred due to atmospheric turbulence disturbance, which affects the imaging quality. In addition, the imaging resolution of traditional standard cameras using classical imaging methods is limited by the basic physical principle - the Rayleigh diffraction limit. According to Abel's principle, the imaging resolution of a lens-based camera is proportional to the numerical aperture of the lens. To obtain a long-dista...

AI Technical Summary

Problems solved by technology

However, in many practical situations and application environments, the image is blurred due to atmospheric turbulence disturbance, which affects the imaging quality. In addition, the imaging resolution of traditional standard cameras using classical imaging methods is limited by the basic physical principle - Rayleigh diffraction limit

According to Abel's principle, the imaging resolution of a lens-based camera is proportional to the numerical aperture of the lens. To obtain a long-distance high-resolution image, it is necessary to increase the focal length and aperture of the lens. It is inconvenient to apply in special imaging environments such as satellites, and the price of large-aperture optical imaging systems is also too expensive

Images