A novel approach to design and implement Differential Time Lapse Video in real time application

Abstract

Time lapse technique is a cinematography technique whereby each film frame is captured at a rate much slower than it will be played back. When replayed at normal speed, time appears to be moving faster and thus lapsing. Processes that would normally appear stable to the human eye, such as the motion of the sun and stars in the sky, blooming flowers, plant growing, rotting fruits etc become very pronounced. Times lapse techniques is a very powerful technique to document extremely slowly changing/developing/moving phenomenon. Basically in this technique, a series of photographs of the subject are taken at regular or irregular intervals and then arranged sequentially to create a small movie of all those shoots. Most of video recording does not require everything to be record, it requires very less information compared to normal video. A differential time-lapse technique allows us to remove the unnecessary data from the normal video, in order to save the time to visualization and storage space. Time-lapse techniques if used for documentary, not only saves the time to understand how thing are changed but also reduces the size of documentary. Differential Time Lapse Video is non-periodic time lapse technique. The disadvantage of the differential time lapse video is that it does not provide the information about at which time the event is recorded. In order to overcome this limitation of the differential time lapse video, loss less visual watermarking is used in real time. MATLAB based algorithm is used for generating the differential time lapse video along with the date and time stamping using the loss less visual watermarking.