Method for automatically judging resolution

Abstract

The invention discloses a method for automatically judging resolution, which is characterized by comprising the steps: first, test chart of the resolution is shot, and the shot chart contains resolution lines of five resolution areas which are a top left corner, a lower left corner, a top right corner and a lower right corner of the resolution test chart; then, the shot picture is coded to determine the brightness Y and chromaticity component Cr of pixel; according to the difference of chromaticity component Cr of the pixel, the coordinates of datum marks of the five resolution areas are determined; according to the five datum mark coordinates, the coordinate of minimum resolution, namely the minimum scale mark coordinate, can be determined; finally, the resolutions of all the resolution areas is analyzed beginning with the minimum scale mark coordinate in the five resolution areas; whether the resolution reaches the mark is judged. When judging the resolution, the method does not needother equipment (such as a computer), so as to save the cost. Furthermore, the resolution time is short, and the method has high flexibility and portability.

Description

technical field [0001] The invention relates to the field of image processing of digital electronic equipment, in particular to a method for automatically determining resolution. Background technique [0002] In the process of producing digital electronic equipment (such as digital cameras, DV machines, mobile phones, monitoring systems, etc.), it is generally necessary to judge the image resolution (that is, the resolution commonly called) of its lens or camera to detect whether it is Meet the factory standard. In the prior art, an indirect method is generally used to judge the image resolution of a lens or a camera on a digital electronic device, that is, to use a lens or a camera to shoot images, and then export several images taken to a computer, and use a special Open the image processing software (such as photoshop, acdsee, etc.), and judge the resolution achieved by the product by manually checking whether the analysis stripes around and in the middle of the analysis...

AI Technical Summary

Problems solved by technology

In the existing method of indirect acquisition of resolution, since the image needs to be manually exported to the computer, in addition to the time spent on manual export and computer reading time, the acquisition of the resolution requires the help of an additional device called a computer; therefore Not only a waste of time, but also a waste of equipment, not direct and fast enough, thus increasing the production cost

In addition, because manual judgment depends on certain operating experience, there are also certain subjective factors. For the image resolution of the same lens or camera, there are relatively large differences in the judgment results of different operators; therefore, the existing indirect method , not precise enough

Images