Fast 2D Interpolatory Texture Extraction with B-splines
Liping Tang · Journal of Donghua University,Natural Science · 2004
Conventional edge operators cannot extract fine texture in images satisfactorily. In this paper, an interpolatory edge operator is proposed to deal with image texture extraction as a supplement to ordinary edge operators. Fast image interpolation is implemented by means of fast B-spline transform. The algorithm detects edge points by seeking points with local maximum values of first derivatives of images. The first derivatives can be calculated quickly by subtraction based on B-splines. From experimental results, we reach the conclusion that satisfactory results of fine texture extraction can be obtained when images are expanded by three times with interpolation.