Flat resolution correcting method for image optical system and apparatus thereof

Abstract

The invention relates to a plane resolution correcting method and device for video optical system, comprising a correction sample and a video sensing device, where the correction sample surface has open wire-buried wire alternating straight line stripes, and the correction sample is arranged at a to-be-measued plane, the video sensing device has video pickup means, memory means and logic calculation means. By picking up correction sample video information and storing the video information and simultaneously selecting and solving straight line equation of open- wire stripes, by straight line slope and intercept of the straight line equation, and by calculating average distance between adjacent open wires through the intercept, finally calculating the multiplication of the video sensing device picked-up video by geometrical means.

Description

technical field [0001] The present invention relates to a plane resolution calibration method of an image optical system and its device, and in particular provides a calibration method for an image capture device, which is used to correct the image magnification corresponding to the pixels. Background technique [0002] The known planar resolution calibration method of an image optical system provides calibration for an image capture device to determine the image magnification corresponding to the pixels of a CCD sensor or a CMOS sensor. Usually this type of technology is to capture the image of the scale marked with the size through the image capture device. Referring to the display in Figure 7, the positions P1 and P2 of the two scale lines are selected by image processing or manually, and the pixel distance between the two is calculated, and The actual distance between P1 and P2 on the scale 6 is determined by design. By comparing the actual distance size with the pixel ...

AI Technical Summary

Problems solved by technology

However, in this type of technology, the scale must be set so that its horizontal axis is parallel to the horizontal axis determined by the pixels of the image capture device. If there is an inclination during the setting, the measurement result will be higher than the actual measurement result. object size is short, resulting in linearity error

As a result, the scale used in the conventional image optical system plane resolution calibration method must be equipped with a rotating platform to adjust the level of the scale, which increases the complexity of the optical system mechanism and also affects the accuracy and speed of calibration.

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