Archived Data Techniques Forums

I have figured out how to select a portion of the image, making the selection rectangle persist in the viewer.

How do I access the selected part of the image, to save it (i.e. to crop the original image)?

The user needs to be able to scan an image, select part of it and save the selection.

Mikael

Hi,

Once you have the coordinates of the section to save then use the ScaleCommand class to crop the image to  the specified portion and then you can save it using the desired codec. When using the ScaleCommand object you'll need to set the SourceArea to the area of the image to be kept, then set the Width and Height properties to the width and height of that area and then call the Process method to return a new image which is just that portion.

Thank you for the quick reply. I figured it out ... Like so: 

(sender as DTI.ImageMan.Winforms.Viewer).Selection.Persist = true;
DTI.ImageMan.Commands.ScaleCommand sc = new DTI.ImageMan.Commands.ScaleCommand();
sc.SourceArea = viewer1.Selection.Bounds;
sc.Width = viewer1.Selection.Bounds.Width;
sc.Height = viewer1.Selection.Bounds.Height;
DTI.ImageMan.ImImage img = sc.Process(viewer1.Images.CurrentImage);
pictureBox1.Image = img.GetBitmapImage();

Mikael

Hi Mikael,

That looks good. Remember you can also use the ImageMan viewer control instead of the pictureBox in your last line of code :-)

Right ... Just testing. :-)

I'll also make sure to use the using ( ... ) { ... } statement, to have the objects disposed automatically and immediately.

Purchased the ImageMan.NET Twain bundle today, thanks to the quick support in this forum.

Mikael

Cool, let us know if you have any other questions or suggestions. There will be a CropCommand in a forthcoming release.