Analysis And Study Of Subtle Changes In Video Image Based Euler Vedio Magnification Technology

Human visual system has limited sensitivity in space and time, but some signalwhich is less than the ability of human visual system identification often contains acertain amount of information, such as the subtle variation in color of skin whenblood flow through his face. While the variation that is not visual for the naked eye ofpeople, is helpful to diagnose human health.Similarly, motion with low spatialamplitude, while hard or impossible for humans to see, can be magnified to revealmechanical behavior which is meaningful and wonderful world of our livingenvironment around us.. In this paper, it takes the method of combination of spatial and temporalprocessing subtle variation of objects in videos to reveal important information of ourliving environment around us. Euler Video Magnification is a kind of indicative wayto reveal color change and movement change which is invisible for human eyes in thesequence of video, which make it possible to measure the pulse and capture the wayblood flow through his face by shooting a video of him. The algorithm is based onstandard video sequence as input, and decompose the signal into different spatialfrequency, and then use filter to extract the signal that is interested in to amplify, andfinally add the amplified signal to the original as the output. This algorithm can showthe change which happened in the frequency band the user chosen. This method canbe used for medical diagnosis, also can be used to detect any smaller sports, forexample structural engineer can detect the way wind sway buildings and crane ordeform slightly in the future,to prevent or reduce accidents.For Euler Video Magnification technology， this paper firstly design theframework of the system and show the implementation process of the technologythrough the way of system flow chart intuitively. Then analysis and simulate thetheory for the every step of the technology, including theoretical derivation, the scopeof the magnification factor, the size of the filter. Then the paper realize magnificationof the pulse and the change of color of human face, and analysis and simulate theresult of experiment.Finally the paper get the right range of amplifaction factor forpulse and face color through a lot of experiments. In this paper, the method can provide medical diagnosis with a more intuitiveway.Due to the elderly and infants and young children with fragile skin, contactsensor measuring pulse is easy to cause harm to human body. This article uses theEuler Video Magnification technology to magnify the pulse, so that can realize notonly the non-contact measuring pulse, but also the detection of dynamic pulse signalin real time. In this paper, a focus is amplification factor which is suitable to see thepulse clearly and a lot of experiments had done. Finally the paper sums up the suitablemagnification factor. The magnification of facial color not only reflect the humanhealth from another angle, is also a study of changes caused by the fluctuation in theheart. The paper also do a lot of experiment for color change of human face and getthe range of factor.