小编Roh*_*hit的帖子

我有以下代码,可以找到2个图像(或2个视频帧)的光流,并且它是彩色编码的.我想要的是光流的水平和垂直分量(如单独的图像)

这是我到目前为止的代码:

import cv2
import numpy as np
frame1 = cv2.imread('my1.bmp')
frame2 = cv2.imread('my2.bmp')
prvs = cv2.cvtColor(frame1,cv2.COLOR_BGR2GRAY)
next = cv2.cvtColor(frame2,cv2.COLOR_BGR2GRAY)
hsv = np.zeros_like(frame1)
hsv[...,1] = 255

while(1):
    next = cv2.cvtColor(frame2,cv2.COLOR_BGR2GRAY)
    flow = cv2.calcOpticalFlowFarneback(prvs, next, 0.5, 3, 15, 3, 5, 1.2, 0)
    mag, ang = cv2.cartToPolar(flow[...,0], flow[...,1])
    hsv[...,0] = ang*180/np.pi/2
    hsv[...,2] = cv2.normalize(mag,None,0,255,cv2.NORM_MINMAX)
    rgb = cv2.cvtColor(hsv,cv2.COLOR_HSV2BGR)

    cv2.imshow('frame2',rgb)
    k = cv2.waitKey(30) & 0xff
    if k == 27:
        break
    elif k == ord('s'):
        cv2.imwrite('opticalmyhsv.pgm',rgb)

cap.release()
cv2.destroyAllWindows()

鉴于我的两张图片,这就是光流的样子: