Basic

Support
Required licenses	Any
Recommended images	Any
Location	Image Processing/Basic

Purpose

This sample program demonstrates how to:

• Display an image.

• Display and graphically interact with an ROI.

Code highlights

1. Load an image file from the disk into an EImage object.

   image.Load(...);
   

2. Attach (associate) an ROI to the image. The ROI gives access to the selected part of the image content.

   roi.Attach(image);
   

3. Position and size the attached ROI on the image.

   roi.SetPlacement(orgX, orgY, width, height);
   

4. Draw the image in a graphical device context.

   image.Draw(drawAdapter);
   

5. Draw the frame (the external rectangle) of the ROI in a graphical device context. The second parameter enables the handles to manually manipulate the ROI position and size.

   roi.DrawFrame(&drawAdapter, true);
   

6. Retrieve the cursor coordinates after clicking.

   handle = roi.HitTest(x, y);
   

7. Move the handle to its new retrieved position and modify the ROI accordingly.

   roi.Drag(handle, x, y);