zooming an image using nearest neighbor interpolation

nearest neighbor interpolation is used to zoom an image by any positive real number(any n>0).

Description

zooming a given image by a given positive factor can be done..
copy nearest_neighbor_zoom.m file and the image file that should be zoomed to your work directory.
if the name of the image file is image.jpg and the zooming factor needed is 2.23,
run following command on command window.
nearest_neighbor_zoom('image.jpg',2.23);

Leave your comments...

• MATLAB release: MATLAB 7.0.4 (R14SP2)

[Jan Simon]

No help section, no H1 line, no checks of input. The function fails for indexed images.
The processing is performed by nested FOR loops without pre-allocation, such that the efficiency is very very low. Therefore this function is neither useful for real applications nor for education.
Take a look into INTERP2, which performs a dramatically more efficient nearest neighbor interpolation.