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Laravel Tech Community
Laravel Tech Community
Aug 4, 2021 · Backend Development

PHP imagecolorat: Retrieve Pixel Color Index Value

The article explains PHP's imagecolorat function, which returns the RGB integer of a pixel in a true‑color image using the GD library, and shows how to extract red, green, and blue components with bitwise operations through a complete code example.

GDPHPbackend
0 likes · 2 min read
PHP imagecolorat: Retrieve Pixel Color Index Value
New Oriental Technology
New Oriental Technology
May 24, 2021 · Fundamentals

Understanding Digital Image Acquisition, Color Spaces, and Video Encoding Basics

This article explains how digital images are captured as pixel arrays, describes the physiological basis of color perception, compares RGB and YUV color spaces, and introduces video compression concepts such as spatial and temporal redundancy, frame types, and common encoding formats.

RGBYUVcolor space
0 likes · 21 min read
Understanding Digital Image Acquisition, Color Spaces, and Video Encoding Basics