A method for instantly analyzing a physiological feature in a video, initially receiving a video image transmitted from the Internet, the video image undergoing at least one image compression； determining whether the video image includes a skin image region, if the skin image is present The region proceeds to the next procedure； performing a difference weight calculation based on the Y value of each pixel in the YUV color space in the video image, the difference weight calculation being the difference of the Y value of each pixel in the continuous frame. And a weighted value according to the difference is used as a calculation parameter, and a complex heart rate characteristic value corresponding to one of the pixels is generated； and the heart rate characteristic values continuously generated are integrated to obtain a physiological characteristic of a heart rate signal.一種於視訊中即時分析生理特徵的方法，起初接受一來自網際網路傳輸的視訊影像，該視訊影像經過至少一次的影像壓縮；判斷該視訊影像中是否包含一皮膚影像區域，如有該皮膚影像區域進入下一程序；基於該視訊影像中每一像素在YUV色彩空間中的Y值進行一差值權重計算，該差值權重計算是以每一該像素於連續訊框中Y值的差值與一根據該差值變化的加權數值作為計算參數，並產生複數分別對應其中一該像素的心率特徵值；整合連續產生的該些心率特徵值，取得為一心率訊號的生理特徵。
