如何使用matplotlib绘制YCBCR颜色空间图像？

Question

这是我的代码，它显示了除ycbcr之外的所有

空间

fig=plt.figure(figsize=(9, 9))
for images, labels in train_ds.take(1):
    for i in range(16):
      plt.subplot(5, 5, i + 1)
      color_space = COLOR_SPACES[i%5]
      image = tf.expand_dims(images[i//5] ,axis=0)
      image = augmentation(NormalLayer(color_space)(tf.cast(image,tf.float32)))
      if color_space=="YCBCR":
        image = tf.cast(image, tf.uint8)
      image = ConvertLayer(color_space)(image)
      #image = tf.cast(image * 255.0, tf.uint8)
      lbl = "{}({})".format(class_names[labels[i//4].numpy().argmax()] , color_space )
      plt.imshow(tf.squeeze(image))
      plt.title(lbl)
      plt.axis("off")
    break

颜色 =“ https://i.sstatic.net/it7rx.png” alt =“在此处输入图像说明”>

我只需要在matplotlib中可视化它。

Answer 1

使用以下代码，我能够在matplotlib中可视化图像。

import matplotlib.pyplot as plt
import numpy as np

x=plt.imread("/content/car.jpeg")
y=rgb2ycbcr(x)

fig = plt.figure(figsize=(10, 7))
rows = 1
columns = 2

fig.add_subplot(rows, columns, 1)
plt.imshow(x)
plt.axis('off')
plt.title("RGB")

fig.add_subplot(rows, columns, 2)
plt.imshow(y)
plt.axis('off')
plt.title("YCBCR")

def rgb2ycbcr(im):
    xform = np.array([[.299, .587, .114], [-.1687, -.3313, .5], [.5, -.4187, -.0813]])
    ycbcr = im.dot(xform.T)
    ycbcr[:,:,[1,2]] += 128
    return np.uint8(ycbcr)

输出：