| Abstract: | A new method for constructing a fitting surface on a triangular grid is presented.Assuming images are obtained by sampling from the original scene.Conventional polynomial interpolation methods generally construct the fitting surface on a square grid.Different from existing methods,the new method constructs the fitting surface on a triangular grid which can divide the original surface more detailed and improve approximation accuracy.As the quality of the image edges plays a key role in visual effects of image,the new method uses image edges as constraints to get a triangle grid.The new method constructs a cubic polynomial patch locally using image data to approximate the original surface.Experimental comparison results of the new method with other methods show that the new method can produce high-quality images and remove the zigzagging artifact. |
