Twain Scanner Devise

By | 29.10.2019

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Introduction [top] When I bought a new scanner some time ago, I chose one which was supported by SANE, as it seemed logical to me to connect it to my Linux server, so I could use it from my regular Windows desktop, or from my laptop. Another solution seemed to be to use a Windows port of XSane but that also wasn’t what I wanted: When I was more or less finished, I saw that another bridge twain-to-sane-bridge had been released. Luckily, again, that did not everything I needed. So I decided to write my own bridge.
Twain Scanner Devise

TWAIN Scanner plug-in

Introduction [top] When I bought a new scanner some time ago, I chose one which was supported by SANE, as it seemed logical to me to connect it to my Linux server, so I could use it from my regular Windows desktop, or from my laptop.

Another solution seemed to be to use a Windows port of XSane but that also wasn’t what I wanted: When I was more or less finished, I saw that another bridge twain-to-sane-bridge had been released. Luckily, again, that did not everything I needed. So I decided to write my own bridge. The project was put on hold for a while, and in october I took it up again. This time I decided to write my own socket communication layer, talking to the SANE net backend myself.

The TWAIN working group provides an example with their development kit, but it didn’t stand out in clarity. From version 1. Installation and setup [top] It might be obvious, but you will need a working SANE installation first, on the server to which the scanner is connected usually a Linux server.

See the SANE website for more information. After downloading SaneTwain see below , unzip the files. Put ScanImage. Put the SaneTwain. Make sure the SaneTwain. The first time the program is started, a properties window will be shown.

This window can be recalled later using the the properties button. All settings in this window are stored in the sanetwain. If the sanetwain. This might be useful in closed environments.

It is possible to move the sanetwain. SaneTwain will try these folders in that order, and if no INI file is found in any of these directories, fall back to users profile. Connection settings On the “Connection” tab, you can enter hostname and portnumber the default is usually OK.

Leave the “Get list of devices at startup” checkbox checked, so the software will retrieve a list of available devices. Preview settings On the “Preview” tab, you can usually leave “Use minimum resolution” checked, unless the minimum resolution for your scanner is too low to give acceptable previews.

If this is the case, change it to “Use the following resolution” and enter a suitable resolution in the next field. You can also enable an automatic “Find fit” here, see Regions for more details. General settings On the “General” tab, there is an option to instruct SaneTwain to display its window always on top of all other windows.

The next option, when checked, will cause all inactive options to hidden instead of being shown disabled. Any change will take effect after the next restart.

When you change a scanner option, and the backend instructs SaneTwain to reload scanner options, any regions you might have set will be removed. If you want to keep any regions which could be invalid due to the changed scanner options , uncheck “Remove regions when parameters change”. If you want to define a default region to be used by default each time you use SaneTwain, check the “Save regions on exit”. Any regions active when the application closes will be saved to the sanetwain.

This is mutually exclusive with the previous option. Printer settings Check “Show printer setup dialog before print” to bring up the standard Windows printer setup window before each print action.

By default, each scan made will be printed immediately after the scan completes. If you want to collect all scans into a single print job, check “Delay printing until program exit”. If you want a different printer used as default with the Print button, select a printer here. This can be useful for example when you use the print option always to print a scan to a Fax printer driver.

Mail settings Fill in your Evernote email address to enable the “Scan to Evernote” button. Fill in the subject to use when mailing documents to your Evernote account. Use folder and tag1 tag2 to specify the folder and tags to use. The “Scan to Evernote” button will always send the documents without further user intervention. If you want to use a different folder or tags for each scan, use the regular “Scan to mail” button.

Startup settings If you want SaneTwain to automatically start a preview or a full scan when the program is started, check either “Acquire preview on program start” or “Acquire full scan on program start”. On this tab you can also select the language to use in the user interface. Only languages for which I have translations are shown. If you are willing to create a translation for another language, and are willing to keep those translations up to date if I add new strings, please contact me!

Please note that after changing the language you need to restart the application to take full effect. Also note that any saved option values are saved “localized”, so they need to be resaved. Using SaneTwain in “closed” environments [top] When using SaneTwain in a “closed” environment such as a terminal environment where users are not allowed to write to or update files in the Windows folder, it is possible to provide a read-only INI file.

Create the INI file logged in as a user who is allowed to modify files in the Windows folder or copy an INI file from another computer , and change the file properties to “Read-Only”. SaneTwain will read the file, but will not allow the user to change any settings. From then on, the users copy will be used. The global version could be used to provide system defaults, such as hostname, or “preset” devices as described below. These “preset” devices in the INI file allow either multiple scanners attached to different servers to be used using a single INI file, or to alias one scanner to multiple names, each having different default values for one or more options.

Note that this differs from “Get devices at startup”, which only fetches the devices from a single server. To enable this, using the regular user interface, create scanner settings for each required scanner. This might involve setting hostname for each scanner, letting the software retrieve all available scanners, setting options, and saving them see the section Saving options below.

After each scanner, move the the Host and optionally Port and Username keys to the section for the scanner being configured, and optionally rename the scanner device name for a more user friendly scanner name; the scanner device name is used as section identifier in the INI file.

When done with all scanners, add a Devices key to the [Connection] section, using a comma separated string of scanner names as value. Optionally set the Device key to one of these scanners to use as default, or remove the key. Now the next time SaneTwain starts up, it will insert each defined scanner in the combobox for choosing a device, and will set its preset option values.

An example of this setup is as follows: In the combobox at the top right, all available devices should appear. If you have just one device, or have only one device you want to use with SaneTwain, you press the properties button and uncheck the checkbox: The drawback is that you cannot change devices within a single session.

Each of the options except for a few well know options, see below are translated into an input component and placed on one of the option tabs. For string, fixed and integer options without constraints, a text input field is used. For options with a list constraint, a combobox is used. For options with a range constraint a trackbar is used, except when the option allows multiple values, then a curve input window is used see below.

Boolean values are represented by a checkbox, and ‘button’ options by a button When the value of an option is changed, the new value is sent to the SANE backend. This in turn might lead to a reloading of other option values: Options on toolbars [top] For a few well known options, there are special cases: The toolbars all have a popup menu right click on an empty area of a toolbar with which any of the other options can be attached as toolbar to the top of the window. This allows for quick access to much-used options.

Options selected as such are stored in the INI file, and those toolbars are reconstructed on start up. On the same popup menu there is also the option to toggle the use of large icons for the main toolbar. Saving options [top] It is possible to save option values as defaults to the sanetwain.

Just move the mouse over the input component for the option e. A message should appear at the bottom of the window with the name of the option and the saved value. The next time SaneTwain is started, the defaults will be read after opening the scanner device. Saving options does not work for “button” options and options which can have multiple values.

Note that this might not work with all combinations of options and values, as setting one option might influence possible values for other options, and all options are restored from sanetwain.

It is now also possible to have saved option values to be sent to the backend at the moment SaneTwain exits. This could be useful for example for backends where the lamp is not correctly being turned off. See Advanced INI settings for more details. This will retrieve a preview using the lowest resolution available, in the scan mode selected.

When the backend supports setting the region-of-interest i. Regions [top] The main image at the top shows two selected regions. Regions can be selected when supported by the backend by pressing the left mouse button at one of the corners of the region you want to select, and while holding down the mouse button, dragging the mouse to the opposite corner.

During this drag a “rubber band” will show the new region. After releasing the mouse button, the new region will be drawn using a “walking ants” rectangle. Existing regions can be resized by moving the mouse over one of the region borders the mouse cursor will change to indicate you are over a region and pressing the mouse button and dragging the border to its new position.

A region can be deleted by moving the mouse over one of its borders, and pressing the right mouse button. A pop-up window will show see image on the right from which you can select the Delete option. The same menu also contains a “Find fit” option, which will try to find the tightest rectangle fit for the image acquired during preview.

Navigation menu

According to the TWAIN Working Group, it does not furnish any scanners or drivers. They develop the specifications that help the imaging device developers . TWAIN is an application programming interface (API) and transportation protocol that and digital image devices such as scanners, webcams, CCTVs or digital cameras. TWAIN requires software-level drivers for each device it is running on . TWAIN is an interface used to import from imaging devices, such as scanners. For more information, see the TWAIN Working Group’s website at.

Universal Twain Driver

Download the latest UniTwain release. Download now and start a free 15 day trial. No registration required. Free support and updates included in each license. Use a smartphone to scan into an application running on your pc.

Alternatives to using TWAIN

Due to this Windows, our operating system will ignore the deficiencies because we have an excellent complete setup. Latest features of Windows 10 activator Loader by daz: Features of Windows 10 Loader: How to use the Windows 10 Loader.

WATCH VIDEO: Universal TWAIN Importer and Scanner – UniTwain – Terminal Works

High-Speed Scanner (Panasonic Document Scanner Device Driver). * File name ‘*_ All_Package’ includes TWAIN Driver, Device Driver, UserUtility and MCD. Now the next time SaneTwain starts up, it will insert each defined scanner in the combobox for choosing a device, and will set its preset option values. Released in , Twain is the interface standard for Windows and Macintosh that allows imaging hardware devices (such as scanners and.

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