File Exchange

image thumbnail

iir(filename,f,vara​rgin)

version 1.2.0.0 (2.69 KB) by Francisco de Castro
Increases the resolution of an image by interpolation

9.9K Downloads

Updated 21 May 2018

View License

IIR Increases the size of an image by interpolation
B= IIR(inputfile,f) returns the image stored in file 'inputfile' with resolution increased by factor f in both dimensions. 'filename' must be a valid graphic file (jpg, gif, tiff, etc.). It can be grayscale or color.
Parameter 'f' is the size increase ratio, so to increase by 50%
use f= 1.5, to double size (in each dimension) use f= 2.
Additional parameters:
B= IIR(A,f,'Display','off') eliminates display of both images, the original and the modified. Deafult 'on'
B= IIR(A,f,'Method',method) Allows to choose between five methods of interpolation: linear, spline, pchip, cubic or v5cubic. 'method' must be a string character. Default 'linear'

Example:
B= iir('myimage.jpg',2);

The screenshot shows the effect of increasing resolution by 3. Original size: 600x402. After: 2400x1608.
(I took the photo myself. No copyright problems).

Cite As

Francisco de Castro (2021). iir(filename,f,varargin) (https://www.mathworks.com/matlabcentral/fileexchange/21410-iir-filename-f-varargin), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2007a
Compatible with any release
Platform Compatibility
Windows macOS Linux

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!