code: public void setImage(T image) {
  		this.image = image;
  
  		// precompute offsets for faster computing later on
  		for( int i = 0; i < definition.samplePoints.length ; i++ ) {
  			Point2D_I32 a = definition.samplePoints[i];
  
  			offsets[i] = image.stride*a.y + a.x;
  		}
  
  		for( int i = 0; i < definition.compare.length ; i++ ) {
  			Point2D_I32 p = definition.compare[i];
  			offsetsA[i] = offsets[p.x];
  			offsetsB[i] = offsets[p.y];
  		}
  	}
docs: Specifies the image from which feature descriptions are to be created.
  
  @param image Image being examined.