Method, system and device for detecting out-of-focus blurring of fixed-focus camera and medium

Method, system and device for detecting out-of-focus blurring of fixed-focus camera and medium

The invention provides a method, a system, equipment and a medium for detecting out-of-focus blur of a fixed-focus camera, and the method comprises the steps: collecting a photo with a detection image, converting the photo into a gray-scale image, and averagely dividing the gray-scale image into a p...

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Hauptverfasser: LU YUNFEI, GAO RUZHENG, WU ZHENWEN, LI QING
Format: Patent
Sprache:chi ; eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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creator LU YUNFEI
GAO RUZHENG
WU ZHENWEN
LI QING
description The invention provides a method, a system, equipment and a medium for detecting out-of-focus blur of a fixed-focus camera, and the method comprises the steps: collecting a photo with a detection image, converting the photo into a gray-scale image, and averagely dividing the gray-scale image into a plurality of images to be detected according to a fixed width; extracting a brightness curve from each to-be-measured image; dividing each brightness curve into a dark area, a bright area and a transition area; positioning and marking the brightness curve with the detection image features; the number of edge points in a detection area of each brightness curve with the positioning mark is calculated; and carrying out mean value calculation on the edge points of all the brightness curves with the positioning marks to obtain an average edge point, if the average edge point is smaller than a threshold value, judging that the camera is in a normal condition, and otherwise, judging that the camera is in an out-of-focus co
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
title Method, system and device for detecting out-of-focus blurring of fixed-focus camera and medium
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