41results about How to "Flexible calibration" patented technology

The invention provides a space analytic geometry-based line-scan camera calibration method and belongs to the line-scan CCD camera calibration field. The space analytic geometry-based line-scan camera calibration method is especially suitable for fast, accurate and flexible calibration of line-scan cameras. According to the calibration method, a new target is designed, and space analysis geometrical relationships are utilized, and the parameters of a line-scan camera can be obtained based on a vector method, and therefore, rapid calibration of the camera can be realized. With the method adopted, calibration accuracy can be ensured without making a precise target required, and the target is not required to move precisely according to a prescribed direction; and the plane of the target and the plane of the camera are not required to be parallel to each other, and therefore, the arrangement position and attitude of the camera can be arbitrary, and the flexibility of the calibration of the line-scan camera can be effectively improved. The space analytic geometry-based line-scan camera calibration method of the invention has the advantages of fast calibration speed, high accuracy, flexible operation and the like. With the space analytic geometry-based line-scan camera calibration method adopted, a precise target is not required to be produced, and fast calibration of the line-scan camera under harsh environment conditions can be realized.

The invention discloses a fragment group spatial distribution parameter test device and a test method. The test device includes a high-speed area array CCD target and an image acquisition instrument. The high-speed area array CCD target is placed in the detection area. The image acquisition instrument and the high-speed area array CCD target and the The upper computer is respectively connected by cables. The high-speed area array CCD target includes a triangular base and a housing. An optical lens is arranged on the upper surface of the housing. An area array CCD camera and an image acquisition unit are installed in the housing. There is a laser emitting unit, which is used to form a first-line laser detection light curtain and a second-line laser detection light curtain that intersect each other. The laser emission unit includes an emitting laser, a first laser optical lens, a second laser optical lens, a first quasi- Straight mirror, second collimating mirror and beam splitter. The invention can realize high-precision measurement of fragment group parameters, saves cost, is convenient to carry, and has flexible calibration.