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Localized encoding increases data throughput of GigE cameras

机译:本地编码可提高GigE摄像机的数据吞吐量

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摘要

While the GigE Vision standard does not require the dedicated frame grabbers of faster interface standards such as Camera Link, Camera Link HS and CoaXPress, the available practical data transmission rate of approximately 115MBytes/s can limit the use of such cameras in high-speed machine vision applications. In an effort to overcome this limitation, Teledyne DALSA has developed a localized relative encoding method, dubbed TurboDrive that, by reducing the amount of data needed to describe an image, can increase the throughput of image data over the GigE Vision interface from between 120-235%. This will allow cameras that employ this method to run at faster data rates. "For instance," says Eric Carey, Program Director for Area Scan Machine Vision at Teledyne DALSA, "the Linea 4k GigE monochrome line-scan camera is normally limited to a 26kHz line rate because of the speed of the GigE Vision interface. Using the TurboDrive method, this line rate can reach 80kHz if highly uniform images are captured-the same rate as the Linea 4k Camera Link model. However, since the GigE Vision interface can be used, no frame grabber is required and longer camera to computer cables can be used."
机译:尽管GigE Vision标准不需要更快的接口标准(例如Camera Link,Camera Link HS和CoaXPress)专用的图像采集卡,但是大约115MBytes / s的可用实际数据传输速率可能会限制此类相机在高速机器中的使用。视觉应用。为了克服这一限制,Teledyne DALSA开发了一种称为TurboDrive的本地化相对编码方法,该方法通过减少描述图像所需的数据量,可以将GigE Vision接口上图像数据的吞吐量从120- 235%。这将允许采用此方法的相机以更快的数据速率运行。 Teledyne DALSA区域扫描机器视觉项目总监Eric Carey说:“例如,由于GigE Vision界面的速度,Linea 4k GigE单色线扫描相机通常限制为26kHz线速。 TurboDrive方法,如果捕获高度均匀的图像,则该线速可以达到80kHz(与Linea 4k Camera Link型号相同),但是,由于可以使用GigE Vision接口,因此不需要抓帧器,并且可以使用更长的相机到计算机的电缆使用。”

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    《Vision Systems Design》 |2015年第8期|9-1013|共3页
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