Hi All,

I am trying to write a basic DICOM VIewer with Zoom, Pan, WIndow Level / Window Width using ClearCanvas. Managed to write Load Images , and apply PAN and Window Level/ Window Width. But when I try to implement zoom , it does work for me. The Scale value does not change irrespective of values been set. Have attached the code snippet

LocalSopDataSource  _sop = new LocalSopDataSource("C:\\DcmFile\\001.dcm");

ImageSop imageSop = new ImageSop(_sop);

IEnumerable images =   PresentationImageFactory.Create(imageSop);

 foreach (IPresentationImage image in images)

Hi, try this:

ISpatialTransformProvider provider = image as ISpatialTransformProvider;
ImageSpatialTransform transform = (ImageSpatialTransform)provider.SpatialTransform;
transform.ScaleToFit = false;
transform.Scale = 3;

Hope this helps,
Stewart

Hi Stewart,

Sorry for delay in reply. Thanks for your reply . It worked fine.

To display this out to a screen ( I prefered writing it to a PictureBox) I did go for DrawToBitmap function of Presentation Image. But it seems to slow when compared to Draw that you have writtern. The delay depends on height of the PictureBox (Have assigned the bitmap to the pictureBox and have fit it). Is there any way that i can get bitmap from IPresentationImage which would be faster than the DrawBitmap ?

 

Thanks

R.Alagaraja

 

Hi, the PictureBox approach is going to be slower because you've already done a double-buffered draw to a bitmap, and then another draw to the screen via the PictureBox. You could try fiddling with some of the PictureBox properties (turn off double-buffering, etc). Also, if the PictureBox has to do any fitting of the image, that will take time, so you'll need to ensure your PictureBox is the same size as the Bitmap.

If you want it to go faster, you will need to use the IPresentationImage's renderer to draw directly to a window/control. It's really not that bad to do, and you can probably just take the code from the TileControl class in the viewer.

Hope this helps,
Stewart

Thanks a ton Stewart.

Will Check from my end and let u know . 

Hi Alagaraja...

Iam also face the same issue when zooming. Did u finish the same?

I want to draw a rectangle while zooming in picturebox. the mousepoint is different with loaded image and picturebox. So, the rectangle is draw somewhere in the image.

Suggest me to how can i sort out this issues and post the sample code.