Name

subsample - subsample image by an arbitrary factor (<1) - the image size will decrease, the physical pixel size will increase.

Usage

output = subsample(input, ratio)

Input

input

image to be subsampled

ratio

subsampling ratio  `r`. nx_new = r * nx_old

Output

output

image with reduced size.

Description

This function is used to change the 'physical pixel size'.

Method

Input image is convoluted in real space with a sinc-Blackman window and samples at new locations are retrieved.

Author / Maintainer

Pawel A. Penczek

Keywords

category 1

FUNDAMENTALS

Files

fundamentals.py

See also

image_decimate

Maturity

alpha

works

Bugs

None. It is perfect.