Title :
Improved definition image expansion
Author :
Schultz, Richard R. ; Stevenson, Robert L.
Author_Institution :
Dept. of Electr. Eng., Notre Dame Univ., IN, USA
Abstract :
A method for nonlinear image expansion is introduced. The method preserves the discontinuities of the original image, therefore producing an expanded image with improved definition. The maximum a posteriori (MAP) estimation technique that is proposed results in the constrained optimization of a convex functional. The expanded image produced from this method will be shown to be aesthetically and quantitatively superior to images expanded by the standard methods of replication, linear interpolation, and cubic B-spline expansion
Keywords :
image processing; MAP estimation; constrained optimization; convex functional; improved definition image expansion; maximum a posteriori estimation; nonlinear image expansion; Additive noise; Constraint optimization; Equations; Face; Gaussian noise; Image edge detection; Laboratories; Pixel; Signal analysis; Spline;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1992. ICASSP-92., 1992 IEEE International Conference on
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-0532-9
DOI :
10.1109/ICASSP.1992.226248
