用 C# 解释多项选择形式（论文）
我有一个一次性项目，公司正在审核大量人员的少量数据。让每个人进行自我审核可能是最简单的方法，但并非所有人都可以使用计算机，因此我将不得不使用基于纸张的方法。
你见过那些纸质选择题答题纸吗？那些你用深色钢笔/铅笔填充圆圈的地方。为了输入出生日期、姓名等，有一个垂直的数字和/或字母数组。在纸张的顶部/底部和左/右边缘上有用于对齐和计时的条。
我想创建自己的表格来分发，然后在计算机上解析。有没有这方面的开源库？由于我可能只会使用一次，因此购买扫描仪等可能效率不高 - 但我们的办公室多功能一体机可以扫描一堆纸张并以 PDF 格式通过电子邮件发送。我可以直接解释 PDF 或提取嵌入的图像。
I have a one-off project where the company is auditing a small amount of data for a huge amount of people. It is probably easiest to get each of these people to audit themselves, but not all people have computer access, so I will have to use a paper-based approach.
Have you seen those paper-based multiple-choice answer sheets? The ones where you fill in the circles with a dark pen/pencil. For putting in dates of birth, names, etc there is a vertical array of numbers and/or letters. On the top/bottom and left/right edges of the paper there're bars which are for alignment and timing.
I'd like to create my own sheet to hand out, and then parse on the computer. Are there any open source libraries for this? As I'm probably only going to use this once, it's probably not efficient to purchase scanners, etc - however our office multifunction can scan a pile of sheets and email them in PDF format. I could either interpret the PDFs directly or extract the embedded images.
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听起来您正在寻找光学标记识别。
source forge 上有一个开源 OMR 项目，以及 关于 OMR 的维基百科文章。
Sounds like you're looking for Optical Mark Recognition.
There's an open source OMR project on source forge, and several others mentioned within the Wikipedia article on OMR.