Calibration preprocessing method suitable for light field camera
A light field camera and preprocessing technology, applied in image data processing, instrumentation, computing, etc., can solve the problem that the preprocessing method is not suitable for light field camera calibration, etc., and achieve the effect of strong robustness
Active Publication Date: 2017-01-04
SHENZHEN INST OF FUTURE MEDIA TECH +1
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[0005] The purpose of the present invention is to propose a calibration preprocessing method suitable for light field cameras, and solve the problem that some preprocessing methods used in the calibration method proposed for light field cameras 1.0 are not suitable for calibration of light field cameras 2.0
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[0058] The present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.
[0059] Please refer to figure 1 . A calibration preprocessing method suitable for light field cameras proposed by the present invention comprises the following steps:
[0060] S1: White image preprocessing to obtain sub-images under each microlens.
[0061] Firstly, disk filtering is performed on the white image, and then all the local maximum points in the white image are found by using the method of morphologically seeking the maximum value, as shown in the attached figure 2 As shown, the black marked point represents the center point of the microlens. Depend on figure 2 It can be seen that the central points located in the same row or column are not on a straight...
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The invention discloses a calibration preprocessing method suitable for a light field camera. The method comprises the steps of (S1) carrying out white image preprocessing to obtain the sub image in each micro lens, (S2) giving a checkerboard image, allowing the checkerboard image and the white image which is subjected to the preprocessing in the step (S1) to meet to obtain sub images in a specified micro lens, and (S3) carrying out corner detection on each sub image obtained in the step (S2). In the white image preprocessing, firstly, the center point position of a micro lens is determined by using a halo method, and then the center point position of the micro lens is optimized by using the means of linear fitting, sub image center point, surrounding micro lens center point and the like. In the corner detection, the Hough line detection is used, then the position of a corner point is calculated, the corner point is subjected to iterative optimization continuously through a self-defined index, and more accurate coordinates are obtained.
Description
technical field [0001] The invention belongs to the field of camera calibration, in particular to a preprocessing method in the calibration process of a light field camera. Background technique [0002] In recent years, a new member of the camera family has ushered in - a handheld light field camera. In principle, it subverts the way traditional cameras collect light. Traditional cameras integrate light from all directions at a point in the scene, while light field cameras (the light field cameras that appear below refer to hand-held light field cameras) Integral of rays in all directions at a point in . In terms of function, it has changed the way traditional cameras take pictures. Traditional cameras generally focus first and then take pictures, while light field cameras can take pictures first and then focus. In terms of application prospects, it can be combined with the most popular virtual reality and augmented reality to provide hardware support for them. [0003] A...
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CPCG06T7/00
Inventor 王好谦吴驹东王兴政张永兵戴琼海
Owner SHENZHEN INST OF FUTURE MEDIA TECH