2-dimensional marking device and marking method for digital aviation measuring camera

Abstract

The invention relates to a two dimensional calibrating device of a digital aerial survey camera and a calibrating method thereof; the two dimensional calibrating device consists of an internal azimuth instrument, a computer, the aerial survey camera to be detected and a collimated light tube; the internal azimuth instrument is a two dimensional fine internal azimuth instrument and mainly includes a fixing frame of a detected system, a pitch axis, an azimuth axis and two axle tables; the aerial survey camera to be detected is arranged in the fixing frame of the detected system of the internal azimuth instrument; the collimated light tube is arranged in front of the aerial survey camera to be detected; in the calibrating process, the computer controls the rotation of the pitch axis and the azimuth axis of the internal azimuth instrument by driving a controlling device; collects the data outputted by the coders arranged in the pitch axis and the azimuth axis; carries out image point location collection on the aerial survey camera to be detected through an image collecting card; the computer calibrates the internal orientation elements and aberrances in the aerial survey camera to be detected by utilizing the collected angle values of the pitch and the azimuth coders and the pixel coordinate of the corresponding image point and through a mathematical model. The two dimensional calibrating device of the digital aerial survey camera and the calibrating method thereof of the invention realizes the accurate calibrating of the digital aerial survey camera with large field coverage and large area array; moreover, the calibrating device is simple and has high calibrating precision.

Description

technical field [0001] The invention relates to a two-dimensional calibration device of a digital aerial survey camera and a calibration method thereof. Background technique [0002] In order to improve the measurement accuracy of aerial survey cameras, usually before each aerial survey camera performs aerial photography tasks, strict calibration is required to measure the internal orientation elements and distortion of aerial survey cameras. [0003] Most of the current indoor calibration methods for aerial survey cameras are purely optical calibration methods, including: forward / reverse node slide rail method, collimator group method and angle measurement method, among which the forward / reverse node slide rail method is not suitable for the whole camera distortion measurement; the measuring device of the collimator group method is complicated; the traditional angle measurement method is suitable for film aerial survey cameras, but not suitable for the calibration of large ...

AI Technical Summary

Problems solved by technology

[0003] Most of the current indoor calibration methods for aerial survey cameras are purely optical calibration methods, including: forward / reverse node slide rail method, collimator group method and angle measurement method, among which the forward / reverse node slide rail method is not suitable for the whole camera distortion measurement; the measuring device of the collimator group method is complex; the traditional angle measurement method is suitable for film-type aerial survey cameras, and is not suitable for the calibration of large-field-of-view and large-area digital aerial survey cameras.

Images