Flicker detection method and device thereof

Abstract

The invention discloses a flicker detection method and a device thereof and the device can carry out real-time detection without affecting the image quality. The method comprises the following steps of: reading a current frame, and obtaining the vertical waveform of the current frame; carrying out frequency spectrum analysis on the vertical waveform or carrying out frequency spectrum analysis on the difference (frame difference waveform) of the vertical waveform of the current frame and the vertical waveform of the historical frame; if the peak exists on the frequency spectrum, judging whetherthe flicker exists or not according to the approaching degree of the frequency of the peak corresponding point and the theoretical peak frequency point.

Description

technical field

[0001] The invention relates to the technical field of image processing, in particular to a method and a device for judging the flicker phenomenon in a row exposure mode of a photosensitive device. Background technique

[0002] When the digital camera device is working, in order to adapt to artificial light sources of different frequencies and outdoor natural light, some parameters of the camera device must be set accordingly, and one of the more important parameters is the automatic exposure time of the camera device. When the photosensitive device is in the row exposure mode, under the light, the light energy received by each row is different, and flicker (flicker) may occur, as shown in Figure 1(a) and Figure 1(b). In order to eliminate this kind of flicker, set the exposure time in multiples of 1 / 100 second (50Hz) or 1 / 120 (60Hz).

[0003] However, in the process of actual use, there is often a mismatch between the parameter settings of the camera device...

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