Title: Load Images
Slug: load_images
Summary: How to load images using OpenCV in Python.
Date: 2017-09-11 12:00
Category: Machine Learning
Tags: Preprocessing Images
Authors: Chris Albon

Preliminaries



In [1]:

    
# Load library
import cv2
import numpy as np
from matplotlib import pyplot as plt

Load Image As Greyscale



In [2]:

    
# Load image as grayscale
image = cv2.imread('images/plane.jpg', cv2.IMREAD_GRAYSCALE)

# Show image
plt.imshow(image, cmap='gray'), plt.axis("off")
plt.show()

Load Image As RGB



In [3]:

    
# Load image in color
image_bgr = cv2.imread('images/plane.jpg', cv2.IMREAD_COLOR)

# Convert to RGB
image_rgb = cv2.cvtColor(image_bgr, cv2.COLOR_BGR2RGB)

# Show image
plt.imshow(image_rgb), plt.axis("off")
plt.show()

View Image Data



In [4]:

    
# Show image data
image









    Out[4]:





array([[140, 136, 146, ..., 132, 139, 134],
       [144, 136, 149, ..., 142, 124, 126],
       [152, 139, 144, ..., 121, 127, 134],
       ..., 
       [156, 146, 144, ..., 157, 154, 151],
       [146, 150, 147, ..., 156, 158, 157],
       [143, 138, 147, ..., 156, 157, 157]], dtype=uint8)



In [5]:

    
# Show dimensions
image.shape









    Out[5]:





(2270, 3600)