Video quality control by determining the frame average color

Abstract

Abstract In modern conditions, despite variety of hardware-software complexes for creation and promotion of multimedia projects, still big problem is the optimum choice of codecs and settings of quality of operations of rendering depending on tasks of developers or a site on which there will be further a material. In most cases now «optimum parameters» of video rendering are understood as creative activity of the person which on the basis of visual survey, specific and subjective ideas of quality of «picture» of a product, has to receive balance between «quality» of the picture and final file size. In fact, now practically there are no tools in order that it is simple to compare two identical videos on quality and to make quantitative quality evaluation of the video file. Therefore, this direction of researches is important and actual. The main objective of work - to define possibility of use of average color of frame and a color difference for quality evaluation of the video files received at different settings of rendering. Results of pilot studies of determination of average color and a color difference for frame of the video file are provided. Experimental and analytical means revealed possibilities of application of this method for quality determination the video file and findings of differences from the original. As showed research, the most high-quality codecs are H265, DivX and MPEG2. In addition, it was set that DivX showed the greatest stability on a color difference. The offered method can be applicable for a provisional estimate of quality of the received movies since average color does not consider the accuracy of some, important parameters, for example, text clearness on frame. It well copes with the general determination of video frame quality.