模拟视频 (VGA) 信号的简单 OCR
有人知道可以对 VGA 流进行 OCR(光学字符识别)的产品或开源项目吗? VGA 屏幕非常简单,数字和字符串位于固定位置。屏幕变化不会太频繁,或者当屏幕变化时,每隔几秒读取一次就可以了。
何苦呢?我想将一些没有任何数字接口的旧医疗设备连接到网络。我会使用 VGA 分离器来分离 VGA 信号,对其运行 OCR,然后将识别的数字/字符串输入到各种程序。我在这里讨论的是非常简单的 OCR,例如从 000.0 到 359.9 的数字。
有人见过这样的事情吗?
Does anybody know about a product or an open source project that would do OCR (Optical Character Recognition) of a VGA stream? The VGA screens are very simple, numbers and strings in fixed locations. The screens do not change too often, or when they do, a readout every few seconds is ok.
Why bother? I would like to connect to the network some older medical devices that do not have any digital interfaces. I would use a VGA splitter to split the VGA signal, run OCR on it, then feed the recognized numbers/strings to various programs. I am talking about very simple OCR here, like numbers from 000.0 to 359.9.
Has anybody seen anything like this?
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如果分辨率不太高(640x480 而不是 2400x1600!),您应该能够相当轻松地进行帧抓取。只要连接绿色信号,它应该有合适的同步。
有特定的 VGA 图像采集卡
最好的开源 OCR 软件包是 Google 的 tesseract
If the resolution isn't too high (640x480 rather than 2400x1600!) you should be able to frame grab it fairly easily. Just connect the green signal, it should have suitable sync.
There are specific VGA frame grabbers
The best open source OCR packages is Google's tesseract