Image Processing and Computer Vision Google Group

Re: image match

seumadr...@gmail.com (Rafael) — Thu, 29 Jan 2009 16:33:06 UT

gauss[ i ][ j ] = exp ( (-1)*( i * i + j * j ) / ( 2 * PI *
sigma )) / ( 2 * PI * sigma * sigma );
}

Re: image match

kiran.man...@gmail.com (Kiran) — Thu, 29 Jan 2009 14:13:27 UT

Hello Huang,

In fact, your code looks pretty fine to me... but I think the Gaussian
function should be:

gaussian[i][j] = A* exp ( -( i * i + j * j ) / ( 2 * sigma *
sigma) )

* note that there is no PI on exp's denominator
* A = ( 1 / (2 * PI * sigma * sigma) )

But you can deal with A = 1, since it only changes the

Re: image match

huy.hoan...@gmail.com (le su) — Thu, 29 Jan 2009 14:04:25 UT

I think the problem is the case i=0 and j=0. Plz try replacing the
statements to:
for ( i = 1; i < 4; ++i ) {
for ( j = 1; j < 4; ++j ) {
gauss[ i-1 ][ j-1 ] = exp ( -( i * i + j * j ) / ( 2 * PI *
sigma )) / ( 2 * PI * sigma * sigma );
}
By the way, I find keypoints by searching local extremas which are maximas

Re: image match

m.mogh...@gmail.com (Mohammad Moghimi) — Thu, 29 Jan 2009 13:10:17 UT

Hi,
There are many SIFT programs available on the internet
[link]
[link]
.
.
.

CFP: 5th International Symposium on Visual Computing, Nov 30 - Dec 2, 2009, Las Vegas, NV, USA

be...@cse.unr.edu (George) — Mon, 26 Jan 2009 07:18:38 UT

CALL FOR PAPERS, SPECIAL TRACKS and DEMOS

5th International Symposium on Visual Computing (ISVC09)
Monte Carlo Resort & Casino
Las Vegas, Nevada, USA
Nov 30 - Dec 2, 2009
[link]

IMPORTANT DATES

Special track proposals March 16, 2009
Paper submissions July 10, 2009

image match

huhuang...@yahoo.com.cn (Huang) — Mon, 19 Jan 2009 03:25:25 UT

Hi,
Those days I'm studying image match using SIFT,but I have a
trouble in writing source code,I write the Gauss template as follow:
for ( i = 0; i < 3; ++i ) {
for ( j = 0; j < 3; ++j ) {
gauss[ i ][ j ] = exp ( -( i * i + j * j ) / ( 2 * PI *
sigma )) / ( 2 * PI * sigma * sigma );

Re: SMISDK-Lakshya v1.0.0.1 finally available for free download

pixel.to.l...@gmail.com (Science.Medical.Imaging List) — Mon, 25 Aug 2008 04:02:05 UT

The download page link is:

[link]

On Aug 24, 9:00 pm, "Science.Medical.Imaging List"

SMISDK-Lakshya v1.0.0.1 finally available for free download

pixel.to.l...@gmail.com (Science.Medical.Imaging List) — Mon, 25 Aug 2008 04:00:22 UT

Dear Medical Imaging Enthusiast,

Thank you for your immense support for the first 6 releases of
SMIViewer - A free for research DICOM volume analyzer.

As promised earlier, we have decided to release a basic version of
the
Software Development Kit that is the backbone of SMIViewer: SMISDK

SMIViewer 1.0.0.6 download information

pixel.to.l...@gmail.com (Science.Medical.Imaging List) — Tue, 15 Jul 2008 08:06:05 UT

Dear fellow researcher,

We would like to announce the release of version 1.0.0.6 of SMIViewer
- a free for research DICOM volume analyzer.

We are also pleased to let you know that SMIViewer was featured on a
public forum recently: [link]

SMIViewer v1.0.0.5 now available

pixel.to.l...@gmail.com (Science.Medical.Imaging List) — Sun, 29 Jun 2008 21:04:41 UT

Dear SMIViewer enthusiast,
A new revision of SMIViewer is now available for download:
// June 29, 2008 : v1.0.0.5: Support for large datasets.
// Improved VR with cut plane.
// Multi-frame data support.
// Many bug fixes.
Download instructions are available here:
[link]

find a moving object XY position in a fixed background

mch...@gmail.com (Greg Ruo) — Wed, 11 Jun 2008 06:52:19 UT

Dear All,

since few monthes I am in charge of a new thema in the field of
pattern
recognition. If I do not take too much of your time, can you give me
few
general suggestions for my new project ?

My questions are very general and presumably simple for you already
expert in the filed. Here a

cvDFT vs FFTW

rohit.kgp...@gmail.com (rohit) — Thu, 19 Jun 2008 07:03:46 UT

Hi All,
I have the following confusions-
1) Does the function cvDFT compute normal DFT or FFT ?
2) would it be better to use FFTW library to compute FFT in place of
the function cvDFT ?
3) Finally, how exactly do you use the function cvDFT ? I mean how do
you store the real and complex values in the matrix? and then how do

Need an idea..

marcus.f...@gmail.com (Marcus.) — Tue, 10 Jun 2008 09:36:32 UT

Hello there..

I've been working on a image processing application for 3-4 months. It
basically searches saved frames inside of a video file. User marks a
frame on a video file, and application gets Edge and Color histograms
and saves it to a database and when user searches for a frame inside
of another video, application, first gets all frames in the video and

SMIViewer v1.0.0.4 - latest version of free DICOM volume analyzer is available now

pixel.to.l...@gmail.com (Science.Medical.Imaging List) — Tue, 17 Jun 2008 08:39:34 UT

Dear All,

Thank you for a tremendous response to first three revisions of
SMIViewer.

A fourth revision of this free for research DICOM volume analyzer is
now available for download.

New in v1.0.0.4:

- Basic segmentation support
- Basic mask operations
- Translucent mask rendering
- Multi-threaded processing

SMIViewer v1.0.0.3 is now available for free download

pixel.to.l...@gmail.com (Science.Medical.Imaging List) — Fri, 06 Jun 2008 08:13:49 UT

Dear Medical Imaging Enthusiast,

A third revision of SMIViewer, a completely free and soon to be
opensource DICOM volume analyzer, is now available for free download.

Changes and updates since the last release include:

// Loading for images with lacking/invalid spacing fixed (thanks Vince

Image Processing and Computer Vision Google Group

Re: image match

Re: image match

Re: image match

Re: image match

CFP: 5th International Symposium on Visual Computing, Nov 30 - Dec 2, 2009, Las Vegas, NV, USA

image match

Re: SMISDK-Lakshya v1.0.0.1 finally available for free download

SMISDK-Lakshya v1.0.0.1 finally available for free download

SMIViewer 1.0.0.6 download information

SMIViewer v1.0.0.5 now available

** find a moving object XY position in a fixed background **

cvDFT vs FFTW

Need an idea..

SMIViewer v1.0.0.4 - latest version of free DICOM volume analyzer is available now

SMIViewer v1.0.0.3 is now available for free download

find a moving object XY position in a fixed background