Depth-of-field extension system, method and device, control equipment and storage medium

Abstract

The invention discloses a depth-of-field extension system, method and device, control equipment and a storage medium. In the embodiment of the invention, a first image sensor and a second image sensor in a first image acquisition device and a second image acquisition device are inclined by a predetermined angle, so the depth of field of the first image acquisition device and the second image acquisition device in the horizontal direction is expanded. Moreover, the depth-of-field extension system in the embodiment of the invention comprises two lenses, and the vertical distances between the focuses of the first lens and the second lens and the first plane where the shooting target object is located are different; therefore, the vertical depth-of-field ranges of the first image acquisition device and the second image acquisition device are different, the two vertical depth-of-field ranges are staggered in the vertical direction, and the purpose of vertical depth-of-field expansion is achieved by combining the two vertical depth-of-field ranges.

Description

technical field [0001] The present invention relates to the field of optical technology, in particular to a depth of field expansion system, method, device, control device and storage medium. Background technique [0002] In the field of optical technology, large depth of field has always been one of the research hotspots of imaging systems. For imaging systems, large depth of field means that there are more clear target objects in the same picture, and the monitoring range of target objects is larger. [0003] The method of expanding the depth of field in the prior art is generally, for ordinary optical imaging systems, the most convenient way to increase the depth of field is to reduce the aperture of the aperture stop, but the problem with this method is that with the reduction of the aperture , the light energy attenuates sharply, and the cut-off frequency of the system will decrease accordingly, resulting in a decrease in imaging quality. Another method for extending t...

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Problems solved by technology

[0003] The method of expanding the depth of field in the prior art is generally, for ordinary optical imaging systems, the most convenient way to increase the depth of field is to reduce the aperture of the aperture diaphragm, but the problem with this method is that, with the reduction of the aperture , the light energy attenuates sharply, and the cut-off frequency of the system will also decrease accordingly, resulting in a decrease in imaging quality

Another way to expand the depth of field is to control the image sensor to tilt at a certain angle. The problem with this method is that it can only expand the depth of field in the horizontal direction, and the range of depth of field in the vertical direction is still small.

The height range where faces mainly appear is generally 1.2 meters to 2 meters, and there may still be a problem that the vertical depth of field cannot cover the height range where faces mainly appear

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