从OpenCV到PIL的转换不准确 [英] Conversion from OpenCV to PIL is not accurate

问题描述

当我将图像从PIL转换为OpenCV时，颜色会略有变化.

When I convert an image from PIL to OpenCV, colors change slightly.

from PIL import Image
import cv2
import numpy as np
image = cv2.imread('1.jpg')
image1=Image.open('1.jpg')
image1 = cv2.cvtColor(np.array(image1), cv2.COLOR_RGB2BGR)
print(image[79])
print(image1[79])

前四行是:

[144 151 148]
[101 108 105]
[121 128 125]
[108 118 112]

和

[140 152 146]
[ 97 109 103]
[117 129 123]
[104 118 112]

我认为索引可能会偏离一个，但事实并非如此.有没有办法来解决这个问题? 这是图片(但其他图片也一样):

I thought the indexing may be off by one but it isn't. Is there a way to fix this? This is the image (but it's the same on others too):

推荐答案

这表明PIL和OpenCV使用的libjpeg版本不同或具有不同的参数.同样，如果您不要求OpenCV不尝试使用libjpeg-turbo，请参阅此处的代码:

That suggests PIL and OpenCV are using different versions of libjpeg or using it with different parameters. Also it seems OpenCV tries to use libjpeg-turbo if you don't ask it not to do so, see the code here: https://github.com/opencv/opencv/blob/master/cmake/OpenCVFindLibsGrfmt.cmake#L39

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