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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.

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.NET Scanning API

Is there any free or commercial component written in .NET (no COM interop) that will work with most twain scanners?
Erick Sgarbi
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Barcode Scanner implementation on Java

Good sirs, I have a question. The school Java project I am currently working on requires me to have a USB Barcode Scanner as an external input to be connected to my laptop. I haven't actually bought the USB Scanner since it's quite expensive for a…
user976123
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How to scan for available bluetooth devices in range in android?

I need to get a list of available bluetooth devices in the area using google android 2.1. Thing is, i don't just need a list of those devices, i need some unique id for each device found and i need an indicator, how "good" the signal is received…
xenonite
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Suggest an OCR Library for iOS

I want to make an offline iPhone application that can grab text from a picture. Can anyone suggest the best library which I can use. I heard ZBAR and ZXING can be used only for barcode reading. Is there any other OCR Libraries for iOS to read text…
Vaisakh
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PDF and text layer

According to this site http://www.searchable-pdf.com/content.php?lang=en&c=61, a PDF can be searchable when a text layer is added. I was looking for the technical specification of a PDF. I think text can be stored in 2 ways into a PDF: a) as a text…
Jochen Hebbrecht
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Android : Capture a document & Scan it using camera

I would like to develope an application in android. The requirement is to scan a document using the camera and to convert the scanned data to a pdf file, so that it could be used as an attachment in mail. Please provide me some sample code... Thank…
Kannan Suresh
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Open Source Iris Scanning Library in Java

I am looking for suggestions about open source Iris Scanning libraries in Java. Has anyone used before which can built an unique profile for each scan & be able to authenticate too. Thank you.
Dilipkumar J
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How to scan in PHP

I want to scan from my PHP script. I'm using Ubuntu 14.04 LTS, a Brother MFC-7840W scanner (located at work), and a Brother MFC-9840CDW (located at home). I can scan from the terminal and PHP when either scanner is connected to the computer as a…
Arya
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How do I use the scanCrop property of a ZBar reader?

I am using the ZBar SDK for iPhone in order to scan a barcode. I want the reader to scan only a specific rectangle instead of the whole view, for doing that it is needed to set the scanCrop property of the reader to the desired rectangle. I'm having…
Sagiftw
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Canon TWAIN scanner stuck on 'Warming up' for minutes

I'm trying to interface with a TWAIN-compliant multifunction printer and scanner, a Canon Pixma MG5750, from C# using the NTwain library. I'm writing a program to scan an image into an Image object. The scanner has to warm up before scanning the…
Aaron Christiansen
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Python - how to make BMP into JPEG or PDF? so that the file size is not 50MB but less?

I have a scanner when i scan the page it makes a BMP file but the size per page is 50MB. How do i tell Python, make it JPEG and small size. rv = ss.XferImageNatively() if rv: (handle, count) = rv twain.DIBToBMFile(handle,'imageName.bmp') how do you…
user285594
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WIA Scanning via Feeder

WIA Scanning via Feeder Here is my device properties: Document Handling Select = 1 (2 is for flatbed, and 1 is for the feeder.) Here is my item (page) properties: Horizontal Resolution = 150 Vertical Resolution = 150 Horizontal Extent = 500 (I want…
Willem Toerien
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gdip image save directly intptr in my local drive

I have this code to get the image file from the scanner and save it on local disk: IntPtr img = (IntPtr)pics[i]; SetStyle(ControlStyles.DoubleBuffer, false); …
Ehsan Akbar
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How to stop continuous scanning by zxing-android-embedded in Android

I am using Zxing-android-embedded(https://github.com/journeyapps/zxing-android-embedded) to scan QR codes. I have imported the library from github . When the app starts , the camera is scanning the code repeatedly as long as the camera is placed on…
Thunder Dragon
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Scan screen for color

I would like, in Java, to scan the screen for a particular color. Any idea how to do that?
Rok Povsic
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