Edge-adaptive interpolation and noise filtering method, computer-readable recording medium, and portable terminal

A computer-readable recording medium storing a program causing a processor to execute a process for edge-adaptive interpolation and noise filtering of an image, the process comprising:

• performing primary interpolation on a first color, based on a first preset number of directions, with respect to a first color window obtained from an input image window;
• estimating an edge direction within a primary interpolated first color window obtained by the primary interpolation, based on a second preset number of directions, the second preset number of directions being larger than the first preset number, with respect to the primary interpolated first color window;
• performing secondary interpolation on the first color, based on the estimated edge direction, with respect to the primary interpolated first color window;
• and
• performing interpolation on a second color, based on the estimated edge direction, with respect to a second color window obtained from the input image window.

A portable terminal comprising:

• a computer-readable recording medium storing a program causing a processor to execute a process for edge-adaptive interpolation and noise filtering of an image,
• wherein the process includes performing primary interpolation on a first color, based on a first preset number of directions, with respect to a first color window obtained from an input image window;
• estimating an edge direction within a primary interpolated first color window obtained by the primary interpolation, based on a second preset number of directions, the second preset number of directions being larger than the first preset number, with respect to the primary interpolated first color window;
• performing secondary interpolation on the first color, based on the estimated edge direction, with respect to the primary interpolated first color window;
• and performing interpolation on a second color, based on the estimated edge direction, with respect to a second color window obtained from the input image window.