We saw in lectures that vectors can be used to represent images:In this challenge, you will need to reshape your given vector so that you have 8, 8-vectors. Then use .imshow() to display the resultant image and plt.colorbar() to view the colorscale. Additionally use cmap='gray'.
Question
We saw in lectures that vectors can be used to represent images:In this challenge, you will need to reshape your given vector so that you have 8, 8-vectors. Then use .imshow() to display the resultant image and plt.colorbar() to view the colorscale. Additionally use cmap='gray'.
Solution
Here is a step-by-step guide on how to reshape a given vector into 8, 8-vectors and display the resultant image using matplotlib's imshow() function.
Step 1: Import the necessary libraries
import numpy as np
import matplotlib.pyplot as plt
Step 2: Define your vector. For this example, let's use a vector of size 64 with random values.
vector = np.random.rand(64)
Step 3: Reshape the vector into 8, 8-vectors. This can be done using numpy's reshape() function.
reshaped_vector = vector.reshape(8, 8)
Step 4: Display the resultant image using matplotlib's imshow() function. We will also use the colorbar() function to view the colorscale and set the colormap to 'gray'.
plt.imshow(reshaped_vector, cmap='gray')
plt.colorbar()
plt.show()
This will display an 8x8 grayscale image where the intensity of each pixel corresponds to the value in the reshaped vector. The colorbar on the side shows the mapping between the values and the grayscale intensity.
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