这个图中的成像原理是什么---**Chart/Diagram Description:** * **Type:** Scene with objects (experimental setup/calibration rig). * **Main Elements:** * **Frame:** A cubic or rectangular prism frame constructed from pipes or rods with black and white striped markings. It is connected by black corner pieces. The frame has a square base and a square top, supported by four vertical legs. It appears to be open on the top and sides, forming a cage-like structure. The pipes are decorated with alternating black and white bands of equal width. * **Checkerboard Pattern:** A flat rectangular sheet with a black and white checkerboard pattern, placed on the floor in front of the frame. The pattern consists of black and white squares arranged in rows and columns. * **Floor:** A light gray concrete or tiled floor, showing some dirt or wear. * **Metal Plate:** A rectangular metal plate is embedded in the floor inside the base of the frame. It has some raised features or markings on its surface. * **Other Objects:** * Part of a chair wheel is visible in the upper right corner. * A finger or part of a hand is visible in the lower left corner. * A white object with two visible sockets or connectors is on the floor in the lower center area. * **Relative Position and Direction:** The checkerboard is placed on the floor in front of the frame. The frame is resting on the floor, positioned above the metal plate. The chair wheel is in the background, to the right. **Textual Information:** * No questions, options, or other significant textual information found in the image. The checkerboard is a pattern, not text.