公开(公告)号：EP3971769A1

公开(公告)日：2022-03-23

申请号：EP21151322.1

申请日：2021-01-13

申请人： Universal Global Scientific Industrial Co., Ltd.

发明人： LIN, Cheng-Lung

IPC分类号： G06K9/00 ,  G06K9/20 ,  G06K9/32 ,  G06K9/46

摘要： A preprocessing method for improving image recognition is provided. The preprocessing method includes the following steps: disposing light-emitting diodes (2) to surround an image sensor (1), in which the image sensor (1) corresponds to an image capture region (A); turning on the light-emitting diodes (2) for emitting a white light source having a color temperature of 3200K, in which the white light source has a fixed illumination area range (3), and the illumination area range (3) covers the image capture region (A), such that a color temperature of the image capture region (A) is approximately or equal to 3200K; and turning off the light-emitting diodes (2) for a time interval, such that the image sensor (1) captures images to generate preprocessing frames (M) under a low illuminance condition that is between 0.0004 lux and 1 lux.