WIA Automation for scanner color intent is not working

Question

I cannot get my Canon Pixma MP150 to scan a color scan from c# code. The following code is resulting in a black and white image, or if I change the value of 6146 to 2 then a grayscale image is created. I would like to be able to have a color scan from code. I know the scanner does color images because I can do one through the xp wizard in "scanners and camera". Can anyone help me figure out what value I am not setting for a color scan. All documentation and examples I can find just say to change the value of 6146.

Thank you for taking the time to read this!

    private void ScanAndSaveOnePage ()
    {
        WIA.CommonDialog Dialog1 = new WIA.CommonDialogClass();
        WIA.DeviceManager DeviceManager1 = new WIA.DeviceManagerClass();
        System.Object Object1 = null;
        System.Object Object2 = null;
        WIA.Device Scanner = null;

        Scanner = Dialog1.ShowSelectDevice(WIA.WiaDeviceType.ScannerDeviceType, false, false);

        WIA.Item Item1 = Scanner.Items[1];

        setItem(Item1, "6146", 1);
        setItem(Item1, "6147", 150);
        setItem(Item1, "6148", 150);
        setItem(Item1, "6151", 150 * 8.5);
        setItem(Item1, "6152", 150 * 11);

        WIA.ImageFile Image1 = new WIA.ImageFile();
        WIA.ImageProcess ImageProcess1 = new WIA.ImageProcess();
        Object1 = (Object)"Convert";
        ImageProcess1.Filters.Add(ImageProcess1.FilterInfos.get_Item(ref Object1).FilterID, 0);

        Object1 = (Object)"FormatID";
        Object2 = (Object)WIA.FormatID.wiaFormatBMP;
        ImageProcess1.Filters[1].Properties.get_Item(ref Object1).set_Value(ref Object2);

        Object1 = null;
        Object2 = null;

        Image1 = (WIA.ImageFile)Item1.Transfer(WIA.FormatID.wiaFormatBMP);

        string DestImagePath = @"C:\test.bmp";
        File.Delete(DestImagePath);
        Image1.SaveFile(DestImagePath);
    }

    private void setItem (IItem item, object property, object value)
    {
        WIA.Property aProperty = item.Properties.get_Item(ref property);
        aProperty.set_Value(ref value);
    }

Answer 1

Hello,

unfortunately I can't help you with this, but did you get any further, do you have more WIA Automation code samples? Thanks in advance!

Answer 2

Hey Mike, did you ever find a resolution for this? I'm having the same problem with a different Canon scanner (CanoScan LIDE 25), but the same code produces a color scan if I use a Dell AIO scanner.

I'm guessing it's a problem with the drivers or the device itself at this point, and I'd be interested if you were ever able to get the darned thing to scan in color.

Answer 3

I never really tried too hard past the day I asked this question. I moved on to a different problem and figured someday I would get back to it.

If you are having the same problem then it must be bad Canon drivers. Based upon your info I may buy another scanner (Dell) and try the code. I can always take it back if it does not work.

Thanks!!! At least it lets me know the code is sometimes correct :)

Answer 4

In case anyone else is wondering, you have to set "4104" as well. By default it was set to 1 bit depth. That did the trick for me.

setItem(Item1, "4104", 24);

In order to find this out, I had to enumerate all the properties and see what they were set to:

foreach (Property propertyItem in item.Properties)
{
    if (!propertyItem.IsReadOnly)
    {
        Console.WriteLine(String.Format("{0}\t{1}\t{2}", propertyItem.Name, propertyItem.PropertyID, propertyItem.get_Value()));
    }
}