Region

Support
Required licenses	EasyImage
Recommended images	Any
Location	Image Processing/Region

Purpose

This sample program demonstrates how to:

• Create an ERegion and use it to restrict processing to its domain.

Code highlights

1. Create an ERegion with the desired geometrical shape.

   _region = new EPolygonRegion(...);
   _region = new ERectangleRegion(...);
   _region = new ECircleRegion(...);
   _region = new EEllipseRegion(...);
   

2. Retrieve the handle at the given coordinates so you can later move it to new coordinates and modify the ERegion.

   handle = _region.HitTest(x, y);
   

3. Move the previously retrieved handle to a new position to modify the ERegion.

   _region.Drag(handle, x, y);
   

4. Draw the ERegion components, respectively the area, the contour and the handles (for graphical manipulation purposes).

   _region->Draw(drawAdapter);
   _region->DrawContour(drawAdapter);
   _region->DrawHandles(drawAdapter);
   

5. Compute the pixel average on the image, restricted to the domain of the ERegion.

   EasyImage::PixelAverage(&_image, *_region, average);