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Table Of Contents
Learning OpenCV 5 Computer Vision with Python - Fourth Edition
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Most CV applications need to get images as input. Most also produce images as output. An interactive CV application might require a camera as an input source and a window as an output destination. However, other possible sources and destinations include image files, video files, and raw bytes. For example, raw bytes might be transmitted via a network connection, or they might be generated by an algorithm, if we incorporate procedural graphics into our application. Let's look at each of these possibilities.
OpenCV provides the imread function to load an image from a file and the imwrite function to write an image to a file. These functions support various file formats for still images (not videos). The supported formats vary—as formats can be added or removed in a custom build of OpenCV—but normally BMP, PNG, JPEG, and TIFF are among the supported formats.
Let's explore the anatomy of the representation of an image...
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