This article details a step‑by‑step implementation of visual servoing for a TurtleBot3 using a fisheye camera, ROS Melodic, OpenCV ArUco markers, camera calibration, A‑star path planning, and ROS publishers to move, avoid obstacles, and park precisely at a target pose.
The article explains how to derive rotation and translation matrices through three successive coordinate transformations—world to camera, camera to image plane, and image plane to pixel—to accurately estimate facial Euler angles for face‑recognition tasks.
This article describes how Didi’s vehicle‑vision team built an ultra‑low‑power ADAS solution on the JueShi dash‑cam platform, using lightweight detection models, temporal fusion, camera‑calibration techniques and data‑driven optimization to cut rear‑end collision rates by over 11% and improve overall traffic safety.
This article explores how 3D digital storebuilding integrates multiple visual sensors, GPU acceleration, and advanced camera calibration to create high‑precision, real‑time digital twins of retail spaces, enabling fine‑grained lifecycle management and immersive customer experiences.
