Chen8023 / optical-flow

光流

生成光流

from gen_flow import gen_flow_circle

case = 1  # 1 or 2
height = 101
width = 101
if case == 1:
    flow = gen_flow_circle([height//2, width//2], height, width)
    flow = flow / 3
else:
    flow = gen_flow_circle([0,0], height, width)
    flow = flow / 5

print(flow[:,:,0])
print(flow[:,:,1])

光流可视化

稠密光流

from flow_display import dense_flow

dense_flow(flow)

case 1

case 2

稀疏光流

from flow_display import sparse_flow

sparse_flow(flow, stride=10)

case 1

case 2

backward warp

from image_warp import image_warp

# nearest or bilinear
deformed_nearest = image_warp(img.copy(), flow, mode='nearest')
deformed_bilinear = image_warp(img.copy(), flow, mode='bilinear')

case 1

case 2