WIA自动化扫描仪色彩的意图不工作 [英] WIA Automation for scanner color intent is not working

问题描述

我不能让我的佳能PIXMA MP150扫描从C＃code彩色扫描。下面code是导致黑白图像，或者如果我的6146值更改为2，然后创建一个灰度图像。我希望能有从code彩色扫描。我知道扫描仪确实彩色图像，因为我可以通过在扫描仪和相机的XP向导做一。
谁能帮我找出什么价值，我没有设定一个彩色扫描。所有的文档和例子我能找到的只是说改变6146的值。

感谢您抽出时间阅读本！

 私人无效ScanAndSaveOnePage（）
    {
        WIA.CommonDialog Dialog1 =新WIA.CommonDialogClass（）;
        WIA.DeviceManager DeviceManager1 =新WIA.DeviceManagerClass（）;
        System.Object的Object1 = NULL;
        System.Object的Object2的= NULL;
        WIA.Device扫描仪= NULL;        扫描仪= Dialog1.ShowSelectDevice（WIA.WiaDeviceType.ScannerDeviceType，假的，假的）;        WIA.Item项目1 = Scanner.Items [1];        setItem（项目1，6146，1）;
        setItem（项目1，6147，150）;
        setItem（项目1，6148，150）;
        setItem（项目1，6151，150 * 8.5）;
        setItem（项目1，6152，150 * 11）;        WIA.ImageFile = Image1的新WIA.ImageFile（）;
        WIA.ImageProcess ImageProcess1 =新WIA.ImageProcess（）;
        Object1 =（对象）转换;
        ImageProcess1.Filters.Add（ImageProcess1.FilterInfos.get_Item（REF Object1）.FilterID，0）;        Object1 =（对象）FormatID
        = Object2的（对象）WIA.FormatID.wiaFormatBMP;
        ImageProcess1.Filters [1] .Properties.get_Item（参考Object1）.set_Value（REF Object2的）;        Object1 = NULL;
        Object2的= NULL;        此搜索=（WIA.ImageFile）Item1.Transfer（WIA.FormatID.wiaFormatBMP）;        字符串DestImagePath = @C：\\ TEST.BMP
        File.Delete（DestImagePath）;
        Image1.SaveFile（DestImagePath）;
    }    私人无效setItem（的iItem项目，对象属性，对象的值）
    {
        WIA.Property aProperty = item.Properties.get_Item（REF属性）;
        aProperty.set_Value（参考值）;
    }
 

解决方案

在情况下，其他人很纳闷，你必须设置4104为好。默认情况下，被设定为1位深度。这奏效了我。

setItem（项目1，4104，24）;

为了找到这一点，我不得不列举的所有属性，看看它们被设置为：

 的foreach（房产propertyItem在item.Properties）
{
    如果（！propertyItem.IsReadOnly）
    {
        Console.WriteLine（的String.Format（{0} \\ t {1} \\ t {2}，propertyItem.Name，propertyItem.PropertyID，propertyItem.get_Value（）））;
    }
}
 

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);
    }

解决方案

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()));
    }
}

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