Right around the corner

Image Processing in Python

Rebeca Gonzalez

Data Engineer

Corner detection

Image Processing in Python

Points of interest

Image Processing in Python

Corners

Image Processing in Python

Matching corners

Image Processing in Python

Matching corners

Image Processing in Python

Harris corner detector

Image Processing in Python

Harris corner detector

Image Processing in Python

Harris corner detector

from skimage.feature import corner_harris

# Convert image to grayscale image = rgb2gray(image)
# Apply the Harris corner detector on the image measure_image = corner_harris(image)
# Show the Harris response image show_image(measure_image)
Image Processing in Python

Harris corner detector

Image Processing in Python

Harris corner detector

# Finds the coordinates of the corners 
coords = corner_peaks(corner_harris(image), min_distance=5)

print("A total of", len(coords), "corners were detected.")
A total of 122 corners were found from measure response image.
Image Processing in Python

Corners detected

# Show image with marks in detected corners
show_image_with_detected_corners(image, coords)

Image Processing in Python

Show image with contours

def show_image_with_corners(image, coords, title="Corners detected"):
    plt.imshow(image, interpolation='nearest', cmap='gray')
    plt.title(title)
    plt.plot(coords[:, 1], coords[:, 0], '+r', markersize=15)
    plt.axis('off')
    plt.show()
Image Processing in Python

Let's practice!

Image Processing in Python

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