| 摘要 |
Reducing flicker in digital video, in which, at constant time-averaged illumination intensity, video frames are recorded unevenly with respect to time and in synchronisation with a lighting flicker frequency. Preferably a pixel rate frequency of an image sensor is increased so as to permit more rapid video frame recordal than for the average time between video frames. Preferably the pixel rate frequency is increased to a fixed value, before the interval between frames is varied by a blanking value from frame to frame. Preferably the time interval between successive frames is adjusted so that the start of a frame will have the same light intensity as the corresponding start of all successive frames, whilst maintaining the overall frame rate. Preferably the video is assembled with frames which are equally spaced in time. Also disclosed is Reducing flicker in digital video, in which, at constant time-averaged illumination intensity, video frames are recorded unevenly with respect to time and either in synchronisation with a lighting flicker frequency or ninety degrees out of phase with the lighting flicker frequency, where image processing is then applied so that all frames of the cycle are provided as if recorded under identical illumination intensity conditions. |
