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Computer Vision

Computer Vision. Introduction to Image formats, reading and writing images, and image environments Image filtering. Images. Black and white image is a 2D matrix. Intensities represented as pixels. Color images are 3D matrix, RBG. Linear Filtering.

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Computer Vision

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  1. Computer Vision • Introduction to Image formats, reading and writing images, and image environments • Image filtering

  2. Images • Black and white image is a 2D matrix. • Intensities represented as pixels. • Color images are 3D matrix, RBG.

  3. Linear Filtering • About modifying pixels based on neighborhood. Local methods simplest. • Linear means linear combination of neighbors. Linear methods simplest. • Useful to: • Integrate information over constant regions. • Scale. • Detect changes. • Fourier analysis.

  4. (from Freeman, MIT)

  5. (Freeman)

  6. Convolution • Convolution kernel g, represented as matrix. • it’s associative • Result is:

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