快速解决cv2.imread()读取图像为BGR的问题

img = cv2.imread("xx.jpg")
cv2.imshow("xx",img)

b,g,r = cv2.split(img)
img_rgb = cv2.merge([r,g,b])
plt.figure()
plt.imshow(img_rgb)
plt.show()

from PIL import Image
img = Image.open("test.jpg")
print img.size
print img.getpixel((0,0))

(533, 800)
(217, 229, 225)

img = cv2.imread(""test.jpg"")
print img.shape
print img[0][0]

(800, 533, 3)
[225 229 217]

img = cv2.imread(""test.jpg"")[..., ::-1]
print img.shape
print img[0][0]

(800, 533, 3)
[217 229 225]

def imread(filename, flags=None)

- Windows bitmaps - \*.bmp, \*.dib (always supported)
- JPEG files - \*.jpeg, \*.jpg, \*.jpe (see the *Note* section)
- JPEG 2000 files - \*.jp2 (see the *Note* section)
- Portable Network Graphics - \*.png (see the *Note* section)
- WebP - \*.webp (see the *Note* section)
- Portable image format - \*.pbm, \*.pgm, \*.ppm \*.pxm, \*.pnm (always supported)
- Sun rasters - \*.sr, \*.ras (always supported)
- TIFF files - \*.tiff, \*.tif (see the *Note* section)
- OpenEXR Image files - \*.exr (see the *Note* section)
- Radiance HDR - \*.hdr, \*.pic (always supported)
- Raster and Vector geospatial data supported by GDAL (see the *Note* section)

@param flags Flag that can take values of cv::ImreadModes