python opencv 灰度轉RGB實現方法驗證:
(1)第一個通道的值和原始灰度圖的值完全相同
(2)RGB 3個通道數值都相同
import cv2
img2 = cv2.cvtColor(img, cv2.COLOR_GRAY2RGB)
print(img2.shape)
plt.imshow(img2)
plt.show()
print(np.sum(img2[:,:,0] == img))
print(np.sum(img2[:,:,0] == img2[:,:,1]))
print(np.sum(img2[:,:,0] == img2[:,:,2]))
print(img2[:,:,0] == img)