Image recognition

摘要

A subject (1) is illuminated by a light source (2) and observed by a pair of cameras (3). The outputs of the cameras (3) are input to an image processor (4), operated under the control of a controller (5), which also controls operation of the light source (2). The light source (2) transmits radiation in a frequency range that is limited substantially to a region of increased opacity in the atmospheric transmission spectrum. This may enable the illumination to be quite clearly discriminated, even at relatively great distances and in bright daylight.

主权项

1. A method of forming a 3D image, comprising the steps of illuminating a subject by illumination means and capturing by camera means an image of the subject illuminated by the illumination means:
wherein: the subject is in daylight in an outdoors environment, at a distance of at least 3 meters from the camera means; the illumination means comprises a coherent light source and transmits radiation at a single wavelength of 940 nanometers; the illumination means projects a pattern onto the subject; the camera means comprises at least one camera arranged to capture the components of a 3D image; and an image processor receives the image from the or each camera and calculates the 3D image from the or each received image.