twain

问题 I am building a browser based application for document scanning. I have looked at offerings from multiple providers like dynamosoft, asprise, atalasoft etc. My basic question on browser based document scanning is that does any of these products enable scanning from remote machines, using browser based interface? Or should scanner be always connected to the system from where browser is launched? 回答1: Yes. Browser based document scanning relies on the communication between a local service and

问题 I'm using Delphitwain (delphitwain.sourceforge.net) to add scan functionality to my app. Everything was fine, when i click scan button on my app it will show scan mode with scanner's Properties such as Page Size, Scanning Side (canon dr-3010c) and there is a Scan button and Cancel button. If i click cancel of course all the properties back to it's value before. How can I show this Scanner's Properties only to change properties without Scan, since i can do scan without showing properties Twain

问题 I want to acces a scanner at client side, before I was using java applet without problem but after chrome has decided to not support java what can I do. If there's solution with JS, Jquery or other language please tell me 回答1: Atalasoft has a web scanning toolkit that should meet your needs: Atalasoft WingScan product page The product does not use browser-specific plugins and therefore works nicely in all modern browsers (IE8+, Chrome, Firefox). Architecturally, there is a small local

问题 I need to add TWAIN scanning to an Delphi application and am having trouble locating an off-the-shelf component to do so. I downloaded TDelphiTwain but, when used in D2010 on Windows Vista, it does not appear to recognize any Twain sources on my system. I also tried the trial version of Twain Toolkit for Delphi from MCM which has the advantage of being currently updated (DelphiTwain's last update was 2004), but the Twain Toolkit will not even compile on my system (I think some of the DCUs are

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . I'm working on building an app to scan directly from TWAIN scanner to a Java applet. I'm already aware of Morena and JTwain, but they cost money. I need free. I could re-invent the wheel with JNI, but it seems like someone has probably already done this as a FOSS tool. Is anyone familiar with a free tool that

问题 I have a Brother mutlifunction networked printer/scanner/fax (model MFC-9140CDN). I am trying to use the following code with WIA, to retrieve items scanned in with the document feeder: const int FEEDER = 1; var manager=new DeviceManager(); var deviceInfo=manager.DeviceInfos.Cast<DeviceInfo>().First(); var device=deviceInfo.Connect(); device.Properties["Pages"].set_Value(1); device.Properties["Document Handling Select"].set_Value(1); var morePages=true; var counter=0; while (morePages) {

问题 Please help me out by sharing the step by step procedure to achieve the scanning functionality using Twain in ASP.Net MVC5. Thank you 回答1: At this moment, none of the browsers support scanning out of the box. You need to use a third-party library (not part of Microsoft's .NET core components). Below example uses Scanner.js, which is a product offered by our company: Enable Scanning from TWAIN Scanners to ASP.NET Pages: Step by Step Below steps use Scanner.js as example; they may differ for

问题 Please help me out by sharing the step by step procedure to achieve the scanning functionality using Twain in ASP.Net MVC5. Thank you 回答1: At this moment, none of the browsers support scanning out of the box. You need to use a third-party library (not part of Microsoft's .NET core components). Below example uses Scanner.js, which is a product offered by our company: Enable Scanning from TWAIN Scanners to ASP.NET Pages: Step by Step Below steps use Scanner.js as example; they may differ for

问题 Which parts of the communication with TWAIN can be put into another thread, e.g. a BackgroundWorker? Or: Is it possible to split the loop that handles the image transfer? Some scanner drivers scan all images before returning to the calling application which forces the application to handle all images at once. This results in e.g. OutOfMemoryException or weird behavior in my WPF application when suddenly all events (raised after every scanned image) have to be handled at once. Additionally the

问题 I can connect and get images from my device with twaindotnet. But I want to handle the images as Image class. When I try something like this: ... ArrayList pics = tw.TransferPictures(); EndingScan(); tw.CloseSrc(); if(pics.Count > 0) { IntPtr img = (IntPtr) pics[ 0 ]; PicForm newpic = new PicForm( img ); Image r = Image.FromHbitmap(img, this.Handle); picturebox.Image = r; } ... I'm getting an error as "Error:Generic Error Occured in GDI+" on the line , Image r = Image.FromHbitmap(img, this