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    • 4. 发明申请
    • DISTANCE ESTIMATING DEVICE, DISTANCE ESTIMATING METHOD, PROGRAM, INTEGRATED CIRCUIT, AND CAMERA
    • 距离估计设备,距离估计方法,程序,集成电路和摄像机
    • US20110063437A1
    • 2011-03-17
    • US12922544
    • 2009-07-29
    • Tatsumi WatanabeYasuhiro KuwaharaTakeshi ItoBumpei TojiDaisuke SatoShinya KiuchiYoshiaki Owaki
    • Tatsumi WatanabeYasuhiro KuwaharaTakeshi ItoBumpei TojiDaisuke SatoShinya KiuchiYoshiaki Owaki
    • H04N7/18
    • G01S17/89G01S7/4802G01S17/36
    • Conventionally, there has been a danger that CCD saturation may occur because of the influence of the shot noise and the environment light if a higher resolution of a distance image showing the distance to an object present in a target space and a higher frame rate are achieved when the distance image is estimated by the TOF method, and the distance accuracy may degrade. An emission frequency selecting unit (7) receives light (S2) reflected from the object when a light source does not emit light and selects illumination light (S1) having an emission frequency insusceptible to the environment light according to the frequency analysis of the reflected light (S2). An image creating unit (6) selects a light source emitting the illumination light having the optimum emission frequency from among prepared light sources (9A to 9N), receives reflected light of the illumination light from the selected light source, and creates the distance image showing the distance to the object. The environment light can be mitigated during light reception, and the noise influence on the distance accuracy can be mitigated when a light-receiving element unit (2) exhibiting higher resolution is used.
    • 通常,存在如下情况:由于拍摄噪声和环境光的影响可能发生CCD饱和,如果示出与目标空间中存在的物体的距离更高的距离图像的分辨率和更高的帧速率 当通过TOF方法估计距离图像时,距离精度可能降低。 当光源不发光时,发射频率选择单元(7)接收从物体反射的光(S2),并根据反射光的频率分析选择具有对环境光不敏感的发射频率的照明光 (S2)。 图像创建单元(6)从准备的光源(9A至9N)中选择发射具有最佳发射频率的照明光的光源,接收来自所选择的光源的照明光的反射光,并创建显示 到物体的距离。 可以在光接收期间减轻环境光,并且当使用具有更高分辨率的光接收元件单元(2)时,可以减轻对距离精度的影响。