Monthly Archives: March 2014

Change gnome XTerm colors

To change the gnome XTerm background color (and text color) follow the instructions below.

First of all install the gconf-editor tool

sudo apt-get install gconf-editor

Start the gconf-editor tool and go to apps -> gnome-terminal -> profiles -> Default and change the foreground_color to #FFFFFFFFDDDD  and the background_color to #000000000000 .

Go to an open XTerm window and open the Edit menu and select Profile Preferences. On the colors tab uncheck “Use colors from system theme”.

That’s all; your XTerm terminals now have a black background with a white text color.


Mount NAS CIFS share on Ubuntu

Follow the instructions below to attach your NAS storage to your Ubuntu machine.

First of all install the cifs-utils  package:

sudo apt-get install cifs-utils

Then edit your /etc/fstab  file and add an entry like the one below (adjust directory names for your situation):

//diskstation.local/ShareName /mnt/ShareName cifs auto,iocharset=utf8,uid=1000,gid=1000,credentials=/home/username/.cifspwd 0 0

Then create a new folder (as root) in the /mnt  folder with the same name as specified in the line above (for the example it would be ShareName ).

Next create a file .cifspwd  in your home directory with the following lines:


That’s all; your folder on your NAS will be mounted next time you boot. To mount the new folder immediately issue the command:

sudo mount -all

Have fun!


Scanning an image with C#

This post shows an example of scanning an image with C#. First of all start Visual Studio and create a new console application.scanning software c#

In this example I make use of the standard WIA scanning functionality in Windows 7. Reference the WIA dll in your new project. The dll can be found in the folder “c:\windows\system32\wiaaut.dll”.

The code below scans an image (A4 size) at the default 300 DPI and stores it as an uncompressed TIFF image.

namespace Scanner
   using System;
   sing System.Runtime.InteropServices;

   class Program
      const string WIA_DEVICE_PROPERTY_PAGES_ID = "3096";
      const string WIA_DEVICE_PROPERTY_PAGES_ID = "3096";
      const string WIA_HORIZONTAL_SCAN_RESOLUTION_DPI = "6147";
      const string WIA_VERTICAL_SCAN_RESOLUTION_DPI = "6148";
      const string WIA_HORIZONTAL_SCAN_START_PIXEL = "6149";
      const string WIA_VERTICAL_SCAN_START_PIXEL = "6150";
      const string WIA_HORIZONTAL_SCAN_SIZE_PIXELS = "6151";
      const string WIA_VERTICAL_SCAN_SIZE_PIXELS = "6152";
      const string WIA_SCAN_BRIGHTNESS_PERCENTS = "6154";
      const string WIA_SCAN_CONTRAST_PERCENTS = "6155";
      const int widthA4at300dpi = 2480;
      const int heightA4at300dpi = 3508;

      static void Main(string[] args)
         WIA.CommonDialogClass commonDialogClass = new WIA.CommonDialogClass();
         WIA.Device scannerDevice = null;

             scannerDevice = 

             SetWIAProperty(scannerDevice.Properties, WIA_DEVICE_PROPERTY_PAGES_ID, 1);
             WIA.Item scannnerItem = scannerDevice.Items[1];

             SetA4(scannnerItem.Properties, 300);

             WIA.ImageFile scanResult = 

         catch (COMException ex)
            if ((uint)ex.ErrorCode == 0x80210015)
               Console.WriteLine("No scanner attached");
               Console.WriteLine("Unknown error: {0}", (uint)ex.ErrorCode);

      private static void SetA4(WIA.IProperties properties, int dpi)
            int width = (int)((widthA4at300dpi / 300.0) * dpi);
            int height = (int)((heightA4at300dpi / 300.0) * dpi);

            SetWIAProperty(properties, WIA_HORIZONTAL_SCAN_RESOLUTION_DPI, dpi);
            SetWIAProperty(properties, WIA_VERTICAL_SCAN_RESOLUTION_DPI, dpi);
            SetWIAProperty(properties, WIA_HORIZONTAL_SCAN_START_PIXEL, 0);
            SetWIAProperty(properties, WIA_VERTICAL_SCAN_START_PIXEL, 0);
            SetWIAProperty(properties, WIA_HORIZONTAL_SCAN_SIZE_PIXELS, width);
            SetWIAProperty(properties, WIA_VERTICAL_SCAN_SIZE_PIXELS, height);

       private static void SetWIAProperty(WIA.IProperties properties, 
              object propName, object propValue)
          WIA.Property prop = properties.get_Item(ref propName);
          prop.set_Value(ref propValue);