A large field of view image sharpening device and method based on a focal plane Hartmann wavefront sensor
An image acquisition device and sensor technology, applied in the field of image processing, can solve problems such as the inability to meet the application requirements of large field of view images, and achieve the effect of increasing the image restoration area
Active Publication Date: 2020-08-28
重庆集光科技有限公司
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Problems solved by technology
[0006] The invention solves the technical problem: In order to solve the problem that the current traditional wavefront distortion measurement method cannot meet the application requirements of large field of view image clarity, a large field of view image clarity device and method based on the focal plane Hartmann wavefront sensor is provided , to reduce or remove the image quality degradation that occurs during the aerial image acquisition process, to make the image detail information more prominent by improving the clarity of the image, to restore the original appearance of the degraded blurred image, and to improve the resolution of the aerial imaging system
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[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0031] Such as image 3 As shown, the structure of the focal plane Hartmann wavefront sensor of the present invention is to place a microlens array on the focal plane of the entrance pupil primary mirror, place an array type photodetector on the focal plane of the microlens array, and the microlens array is to The complex amplitude of the light at the focal plane of the entrance pupil is divided into the light field, and each microlens forms a low-resolution image of the observation target at the detector, that is, a spot array is formed.
[0032] Technical steps of the present invention are specifically as follows:
[0033] Step S1: Use an aberration-free ideal planar light source to calibrate the microlens array and the...
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The invention discloses a large field of view image sharpening device and method based on a focal plane Hartmann wavefront sensor. Spatial information is recorded by a light spot array image detectedby a CCD detector in the focal plane Hartmann wavefront sensor, and a microlens array records phase information which are incident light waves of different fields of view or angles. Based on a speciallight field structure, wavefront information of multiple fields of view can be measured at one time so as to achieve an effect of a large field of view. A traditional wavefront detector is generallysmall field of view or zero field of view, and only an intermediate field of view can be detected. After original image information is acquired by an image acquisition device, the device and the method of the invention can be used to restore an entire blurred image area, but only a part of the image can be restored based on the traditional wavefront detector. In the invention, a wavefront error large field of view measurement problem is solved, and an image restoration range is greatly increased and recovery precision is enhanced when the wavefront detector has a certain detection caliber. A,full recovery is achieved; b, a traditional wavefront sensor can only restore areas in a circle; and c, multi-field-of-view simultaneous measurement of the focal plane Hartmann wavefront sensor is combined into a large field of view sketch map.
Description
technical field [0001] The invention belongs to the technical field of image processing, and relates to a large-field image clearing device and method based on a focal plane Hartmann wavefront sensor. Background technique [0002] Aerial images have the advantages of high definition, large scale, small area, and high current situation, and are especially suitable for updating old geographic data, so as to meet people's needs for monitoring data sources. The aerial image refers to an image obtained by photographing and photographing a real object by an aircraft flying in the air at different heights, angles, and azimuths. However, due to the fast flight speed of the aircraft, the temperature of the hood will increase after a long time of high-speed flight, so there will be a strong aero-optical effect during the long-term aerial photography process, which reduces the resolution of the aerial photography imaging system. force. [0003] The wavefront error measurement technol...
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IPC IPC(8): G01J9/00
CPCG01J9/00G01J2009/002
Inventor 马晓燠盛良睿杨奇龙
Owner 重庆集光科技有限公司