pixel coordinate system 坐标系 ; 图像坐标系
Extracting pixel coordinate of control points is one of important methods in general camera calibration.
提取标志点像素坐标是传统的摄像机标定中关键的步骤之一，其精度影响着摄像机标定的精度。
This is because projected coordinate systems have a Y-axis which is the opposite of pixel coordinate systems.
这是因为预计坐标系统有一个Y轴是相反的像素坐标系。
Although some graphics languages don't let you use pixel coordinates, Windows GDI lets you use either system (as well as additional coordinate systems based on physical measurements).
尽管一些图形语言不让你用像素坐标，但是Windows GDI让你用任意一个系统(甚至传统的基于物理度量的坐标系统)。
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