OpenCV half an hour to master the basic operation of corrosion expansion

[OpenCV] ⚠️ Masters don't enter! Learn the basics in half an hour ⚠️ Corrosion Expansion

summarize

OpenCV is a cross-platform computer vision library with multi-language support and powerful features. Today, Xiaobai will bring you into the world of OpenCV together. (Lesson 10)

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corrode (degrade chemically)

Eroding removes boundary points by shrinking inward along the image boundary.

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Original image.

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Example.

# Read the picture
img = ("")

# Corrosion
erode = (img, kernel=(3, 3), iterations=5)

# Pictures to show
("erode", erode)
(0)
()

Output.

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We can see that the circle of lines next to it is basically gone.

dilatation

Dilating expands outward along the image boundaries.

Example.

# Read the picture
img = ("")

# Swell
dilate = (img, kernel=(3, 3), iterations=5)

# Pictures to show
("dilate", dilate)
(0)
()

Output.

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open operator (computing)

Calculation: Eroding before dilating.

Example.

# Open operations
open = (img, cv2.MORPH_OPEN, (3, 3), iterations=5)

# Image presentation
('open', open)
(0)
()

Output.

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closed operation

Calculation: Dilating, then Eroding.

Example.

# Read the picture
img = ("")

# Closed operations
close = (img, cv2.MORPH_CLOSE, (3, 3), iterations=5)

# Image presentation
('close', close)
(0)
()

Output.

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