Used high-speed video camera filming the flow image video of oil-gas-water typical flow pattern.The mean gray of each image and composition of the time series were extracted.In order to study the flow mechanism better,it need to take the time series denoising,based on the introduction of stationary wavelet theory and analysis of existing problems of traditional threshold functions,a novel wavelet threshold denoising method was proposed.In the MATLAB experimental platform,it was proved that this new threshol...