Recall & Review
beginner
What is the main goal of the first image processing program?
To load an image, apply a simple operation like converting it to grayscale, and display the result.
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beginner
Why do we convert a color image to grayscale in image processing?
Because grayscale images have only one channel, making processing simpler and faster while preserving important details.
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beginner
Which Python library is commonly used for basic image processing tasks like reading and showing images?
OpenCV (cv2) is widely used for reading, processing, and displaying images easily.
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beginner
What does the function cv2.imread() do?
It reads an image file from disk and loads it into memory as an array of pixel values.
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beginner
How do you display an image window using OpenCV?
Use cv2.imshow() to open a window showing the image, and cv2.waitKey() to keep it open until a key is pressed.
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What is the first step in a basic image processing program?
✗ Incorrect
The first step is to load the image so you can work with it.
Which OpenCV function converts a color image to grayscale?
✗ Incorrect
cv2.cvtColor() changes the color space, such as from color to grayscale.
What does cv2.waitKey(0) do?
✗ Incorrect
cv2.waitKey(0) pauses the program until you press any key.
Why is grayscale image processing simpler than color image processing?
✗ Incorrect
Grayscale images have one channel, so fewer data to process.
Which library is commonly used for the first image processing program in Python?
✗ Incorrect
OpenCV is the go-to library for basic image processing tasks.
Describe the steps to write your first image processing program using OpenCV.
Think about loading, processing, showing, and closing the image.
You got /5 concepts.
Explain why converting an image to grayscale is useful in early image processing.
Consider how color channels affect complexity.
You got /4 concepts.