opencv imread/imwrite 丢失颜色

Question

我使用示例代码读取/写入一个jpg文件，但丢失了颜色。

import sys
fn1,fn2  = sys.argv[1:3]
import numpy as np, cv2

img1 = cv2.imread(fn1, 0)
vis = cv2.cvtColor(img1, cv2.COLOR_GRAY2BGR)
cv2.imwrite(fn2, vis)

你能帮我找到程序吗

Answer 1

改用这段代码并找出不同之处

import sys
fn1,fn2  = sys.argv[1:3]
import numpy as np, cv2, cv

img1 = cv2.imread(fn1)
vis = cv2.cvtColor(img1, cv.CV_BGR2GRAY)
cv2.imwrite(fn2, vis)