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A high-speed optical mark reader hardware implementation at low cost using programmable logic

机译：使用可编程逻辑以低成本实现高速光学标记读取器的硬件实现

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In today's fast-paced information-driven society, the need for accurate, timely, and cost-effective data collection is very critical. Optical mark reader (OMR) systems can be used to achieve these aspects. This paper describes the development of a low-cost and high-speed OMR system prototype for marking multiple-choice questions. The novelty of this approach is the implementation of the complete system into a single low-cost Field Programmable Gate Array (FPGA) to achieve the high processing speed. Effective mark detection and verification algorithms have been developed and implemented to achieve real-time performance at low computational cost. The OMR is capable of processing a high-resolution CCD linear sensor with 3456 pixels at 5000 frame/s at the effective maximum clock rate of the sensor of 20 MHz (4 x 5 MHz). The performance of the prototype system is tested for different marker colours and marking methods. At the end of the paper the proposed OMR system is compared with commercially available systems and the pro and cons are discussed.
机译：在当今快节奏的信息驱动的社会中，非常需要精确，及时且具有成本效益的数据收集。光学标记读取器（OMR）系统可用于实现这些方面。本文介绍了用于标记多项选择题的低成本，高速OMR系统原型的开发。这种方法的新颖之处在于将整个系统实现为单个低成本的现场可编程门阵列（FPGA），以实现较高的处理速度。已经开发并实施了有效的标记检测和验证算法，以较低的计算成本实现了实时性能。 OMR能够以20 MHz（4 x 5 MHz）的传感器最大有效时钟速率处理5000帧/秒的3456像素高分辨率CCD线性传感器。原型系统的性能已针对不同的标记颜色和标记方法进行了测试。在本文的最后，将提议的OMR系统与市售系统进行了比较，并讨论了利弊。

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