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Questions tagged [scanning]

The act of reading an image, a text or an object using a camera or some other optical input device. This tag should not be used for network, text or file scans.

The act of reading an image, a text or an object using a camera or some other optical input device to a digital file. This tag should cover all that has to do with physical scanners like bed scanners and hand scanners, and software scanning using cameras. It also covers QR codes and barcodes.

645 questions
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Framework/ guide to image recognition- Augmented Reality

Is there any existing framework or guide that gives or explains how to have your app recognize an image. So basically suppose the image was a specific bottle, is there framework that allows you to scan the bottle, and then recognize that it is a…
Big_Fan
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Free SDK for scanning barcode (code 39 format) in iOS

I want to scan a VIN barcode, which in Code 39 format, using the camera of iphone/ipad. I tried zxing and zbar, but they don't work well. Most of time they can not recognize the barcode. Can anyone show me a better way to do that? or is there…
Mimi
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scale and reduce colors to reduce file size of scan

I need to reduce the file size of a color scan. Up to now I think the following steps should be made: selective blur (or similar) to reduce noise scale to ~120dpi reduce colors Up to now we use convert (imagemagick) and net-ppm tools. The scans…
guettli
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scanning pages using WIA or TWAIN

Edit: Are there any tutorials on how to use WIA or TWAIN in c++, that explain how to scan pages, adjust settings (DPI, using automatic feeder etc.) and save them as PNG files? I'd like to use WIA to scan pages and store them as png files. If the…
Pedro
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Talking to a scanner from a PHP script

I run a small business but I need to be somewhat more organised in terms of those letters and invoices i receive. This is what I want to accomplish: When I receive a invoice or some other information on paper, I would place it in my scanners tray…
Henning
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Scan Credit Card library on Swift 5

I want to scan a credit card on an iOS app. I used CardIO Framework but it is not working on ios13 guard let cardIOVC = CardIOPaymentViewController(paymentDelegate: self) else { print("This device is incompatible with CardIO") …
OMhz
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What does the flush function do on read.table in R?

I recently started taking R lectures and I'm currently working on scanning files. On a worksheet, one of my questions is like: Read the file Table6.txt, check out the file first. Notice that the information is repeated, we only want the first…
Levy
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Scan multiple pages using WIA automation

I'm playing around with WIA Automation and I`m struggling to scan more than page at a time. Can anyone give me some hints on how to achieve this? Below is a sample of code I use to scan a document/image: public static byte[] ScanImage(int…
user628060
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How to get PDF file metadata 'Page Size' using Python?

I try to use PyPDF2 module in Python 3 but I can't display 'Page Size' property. I would like to know what the sheet of paper dimensions were before scanning to PDF file. Something like this: import…
Mirek
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ScanSnap Integration

I am currently trying to figure out how to integrate with the fujitsu scansnap scanner and have found no details from fujitsu on how the fujitsu scansnap manager calls your application and send the file to your application. 1.) do the pass a…
jarez
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Tool or plugin to extract class and all of its dependencies from VS project

I have a very large project with lots of files. I need to extract only a few classes into a separate DLL, but the problem is that the classes have many dependencies on other files. Trying to make it manually, I've already spent several hours, and…
SharpAffair
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implementing quagga scanning barcodes

I am making an online scan application just with HTML5 and javascript using Quagga.js. I need to get the webcam working for searching barcodes and imported quagga.js : On the web page of quagga you'll find a method called Quagga.init. to initialize…
Bart Van der Linden
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Perfect OCR scanning for Android

Right now I'm making an OCR app using Android OCR rmtheis(https://github.com/rmtheis/android-ocr) as a scaffold. However, I'm far from satisfied. My main issues: It returns only a fraction of the containing characters correct when scanning…
Anders Persson
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DataMatrix vs GS1 DataMatrix

I've been trying to find out if there is a difference between the way information is stored in DataMatrix vs GS1 DataMatrix forms. I'm wondering if a regular DataMatrix scanner can scan a GS1 DataMatrix code or not. Any help on this subject would…
vinnybad
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Scan multiple pages with ADF scanner using VBA

I am writing a Microsoft Access application and I want to enable the user to scan multiple pages to a single PDF format. The conversion to PDF works fine once I have all the pages scanned. Here's my code: Option Compare Database Option…
Yotam
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