Legacy ImageMagick Discussions Archive

Hi,friends
I don't know how to use linear interpolation method on a matrix like this:
7 5 6
2 8 4
3 5 3
and the other is Interlacing zeros?
I would be grateful if sb help me,plz.

Sorry, but I do not understand your requests. I am not familiar with "linear interpolation method on a matrix". What do you mean by that? What is it you want to do with the matrix -- use it for convolution?

Perhaps you want to compare two images. IM can give you a number of metrics for the difference between two images. See
http://www.imagemagick.org/script/compare.php
http://www.imagemagick.org/Usage/compare/
http://www.imagemagick.org/Usage/compare/#statistics

Or I have a script that will generate a scatter plot between two images, but it does not do the linear regression analysis. See
http://www.fmwconcepts.com/imagemagick/ ... /index.php

For general linear regression, you may need to go to something like MATLAB.

Also I have no idea what you mean by "interlacing zeros"? Do you want to add rows or columns of zeros between each row or column of an image?

Please read viewtopic.php?f=1&t=9620

Here is my problem
https://books.google.com/books?id=ttNuj ... on&f=false

See bilinear filtering. http://www.imagemagick.org/Usage/filter/ and https://en.wikipedia.org/wiki/Bilinear_interpolation

linear interpolation not bilinear or bicubic !!!

The Google books link doesn't work for me.

Linear interpolation is for one dimensional spaces. Bilinear is for two dimensions. The principle is the same.

This is an image forum for 2D processing. As user snibgo said, linear interpolation is for 1D and bilinear is for 2D. The latter is linear in both x and y.

If you really have a 1D situation, then you should post to some other forum.

If not, then please explain your problem in more detail.


If you are trying to fit a line to a set of points, then search Google. Here are some results:

http://hotmath.com/hotmath_help/topics/ ... t-fit.html
http://mathworld.wolfram.com/LeastSquaresFitting.html
http://stackoverflow.com/questions/1144 ... ine-with-c
http://www.johndcook.com/blog/2008/10/2 ... e-to-data/

Let me ask my Q in another way.
Do u know this structure------> imsize(O,[3 3],'bilinear') ?

O=[1 1;2 2]

The answer from matlab is:
1.0000 1.0000 1.0000
1.5000 1.5000 1.5000
2.0000 2.0000 2.0000
Can u get the answer in paper without using matlab ,in paper by hand?

The link is page 294 from DIGITAL IMAGE PROCESSING book By JAYARAMAN.
If u search linear interpolation or zero interlacing expression u will get the page i said.

Your question seems to be about Matlab, not ImageMagick.

I suggest you ask on a Matlab forum, or read the documentation.