Visual Image Measurement Integrated Teaching Experiment Platform: Function and Introduction This comprehensive experimental platform is designed to support hands-on learning in visual image measurement. It includes an adjustable bracket, two CCD cameras, two semiconductor lasers, a calibration target, a measured circular hole, a precision translation stage, an electronically controlled translation stage, a laser and translation stage control box, a computer, and dedicated software. 1. Monocular Camera Calibration Experiment In this experiment, students learn the fundamentals of camera perspective transformation models. They gain insight into internal and external camera parameters and practice monocular calibration techniques. Using the two-step method proposed by R. Tsai, a planar circular hole target is used to generate non-coplanar points. The target is placed on a precision mobile stage, ensuring it fits within the camera’s field of view. The coordinate system is established based on the right-hand rule, with the center of the marked circle as the origin. By moving the target across several positions, students capture images, extract ellipse centers, and calculate camera parameters using the two-step method. Automation is achieved through mark-circle positioning and computer-controlled movement of the target. 2. Binocular Camera Calibration Experiment This experiment introduces students to the principles of binocular calibration. After calibrating each camera individually, a circular target is positioned between the two cameras. A coordinate system is defined, and both cameras capture images of the target. Using feature point coordinates from the images and the world coordinate system, students determine the rotation matrix and translation vector for each camera, aligning them in a common spatial reference. 3. Diameter Measurement of a Circular Hole Using Binocular Vision Students learn how camera calibration affects measurement accuracy in visual systems. They explore digital image processing techniques and test how different binarization thresholds impact the precision of diameter measurements. The hole is positioned centrally between the two cameras, and structured light is used to create intersection points. Images from both cameras are processed to locate these points, convert them to 3D coordinates, and fit a circle to determine the hole's diameter. 4. Line Structured Light Surface 3D Measurement This experiment teaches the basics of 3D surface measurement using line-structured light. Students perform passive scanning, where the light plane and camera are fixed while the object moves. A stepping motor drives the translation stage, allowing multiple light planes to scan the object’s surface. This method simplifies calibration, reduces error influence, and provides accurate 3D contour data. Project Name: Comprehensive Teaching Experiment Platform for Visual Image Measurement Prepared by: National Experimental Teaching Demonstration Center for Precision Instrument and Photonics, Tianjin University Gift bag is a kind of packaging goods, it used to package gift bag. A beautiful gift bag can have a good effect on the gifts.Our company gift bag material is usually plastic with colorful PP material , support patterns and LOGO customization.Gift bags can be used many times in a cycle. Nowday more and more people using gift bags everywhere.Gift bags with custom designs and slogans also have a promotional functions Gift Bag,Portable Gift Bag,Oil Resistant Gift Bag,High Grade Environmental Gift Bag shaoxing chaofeng stationery manufacturing CO.,LTD. , https://www.chaofengstationery.com