Method for estimating point spread function of single-lens light field camera under full aperture
A point spread function and light field camera technology, which is applied to color TV parts, TV system parts, TVs, etc., can solve the problems of complex measurement steps, high complexity, and high cost, so as to save measurement steps, Reduced complexity, time and cost savings
Active Publication Date: 2017-10-20
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology
The traditional method of using blind convolution to obtain the point spread function of a single-lens light field camera has a high algorithm complexity, while the traditional method of using a physical device to measure and obtain the point spread function of a single-lens light field camera has very complicated measurement steps , time-consuming and costly
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[0033] The present invention will be further described below with reference to the drawings and combined with preferred embodiments.
[0034] Such as figure 1 As shown, the method for estimating the point spread function of a single-lens light field camera at full aperture in a preferred embodiment of the present invention includes the following steps:
[0035] S1: Use a single lens light field camera to shoot the light field image under full aperture and the light field image under small aperture of the same scene respectively, where full aperture represents the pupil diameter of the main lens of the single lens light field camera and the whole of the main lens The diameter is the same, and the small aperture means that the ratio of the pupil diameter of the main lens of the single-lens light field camera to the overall diameter of the main lens is less than 0.1;
[0036] Among them, combined figure 2 with image 3 The single-lens light field camera includes a main lens 10, a diap...
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The invention discloses a method for estimating a point spread function of a single-lens light field camera under a full aperture. The method comprises the steps of respectively shooting a light field image under the full aperture and a light field image under a small aperture in a same scene by employing the single-lens light field camera; estimating to obtain an absolute distance of a plane where an object on the light field image under the small aperture is located to a main lens; obtaining a parameter of the single-lens light field camera, and simulating to obtain the point spread function of the single-lens light field camera under the estimated absolute distance and the small aperture; and establishing an imaging model, establishing an optimization model using the light field image under the full aperture, the light field image under the small aperture and the simulated point spread function of the single-lens light field camera under the small aperture, and estimating to obtain the point spread function of the single-lens light field camera under the full aperture. According to the method disclosed by the invention, not only is the algorithm complexity reduced, but also the complex measurement steps can be omitted, thereby saving the time and the cost.
Description
Technical field [0001] The invention relates to the field of computer vision and digital image processing, and in particular to a method for estimating the point spread function of a single-lens light field camera under full aperture. Background technique [0002] Light field cameras are widely used in computer vision, robotics and other fields because of their ability to obtain multi-dimensional information of the scene. Different from traditional cameras, the light field camera inserts a micro lens array between the lens group and the sensor. The micro lens array replaces the position of the sensor of the traditional camera-the focal plane of the lens group. After the microlens array receives the light from the lens group, the light information is further transmitted to the sensor, and the position and direction information of the scene is recorded digitally. The light field camera uses a lens group to reduce aberrations, but the use of the lens group will undoubtedly increase...
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IPC IPC(8): H04N5/225H04N5/232
CPCH04N23/50H04N23/80
Inventor 金欣陈艳琴戴琼海
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV