Hello! I am trying to implement an algorithm which is supposed to find the best match of a given (small) image in a larger image. I have...

Hello! I am trying to implement an algorithm which is supposed to find the best match of a given (small) image in a larger image. I have thought about a few (naive) ways of implementation, and recently have been pointed at FT and wavelets, which - if applicable - sound rather interesting for my problem. So I was wondering whether you can give me any tips on whether using those transfo...

i m doing a project in image watermarking .any of you guys know that how to convert image in to binary bits sequence . i have tried this...

i m doing a project in image watermarking .any of you guys know that how to convert image in to binary bits sequence . i have tried this simple code , a=imread('lena.jpg'); b= round(a./256) but i got binary bits like this= column 1 to some columns 1 0 1 0 0 1 0 0 0 0 0 0 0 1 0 1 0 1 0 0 . . . 1 0 0 0 0 0 0 0 0 ...

Here's a little something I'd like to get suggestions for so I can try them. My problem is the following, for an original image of...

Here's a little something I'd like to get suggestions for so I can try them. My problem is the following, for an original image of given dimensions, you're only given (for example) 6 lower resolution images and by combining them try to obtain something as close as possible to the original full resolution image. Here are in my example the characteristics of the 6 low resolution images : 1st...

Hi all, I am new member to this group. Actually, I have read a data file of an image from its sub header stored the data in a buffer.*imdata is...

Hi all, I am new member to this group. Actually, I have read a data file of an image from its sub header stored the data in a buffer.*imdata is a pointer to the buffer for data. The data size is 100x100x81 and no. of bytes per pixel is 4 bytes and the format type is float. Now I have to take the center slice of this 3d image and locate ROI (region of interest) and find mean within this region. ...

Hi! I am working over high quality image processing algorithms (image shifts, image rotation, etc). I am trying to use 1D sinc interpolation,...

Hi! I am working over high quality image processing algorithms (image shifts, image rotation, etc). I am trying to use 1D sinc interpolation, but it produces Gibbs artifacts. Is it possible to modify sinc interpolation in some way in order to reduce these artidacts? Perhaps, it is better to use some other interpolations for the case of sharp edges? I have tried to apply some windows (Hann, La...

Dear friends, I just started PhD in image processing at Monash University and am currently looking for latest hot topic for my thesis. Does...

Dear friends, I just started PhD in image processing at Monash University and am currently looking for latest hot topic for my thesis. Does anyone know any research group working on areas of face recognition, medical images (in terms of image retrieval)? Or, anyone can suggest good topic, or professor, etc? Thank you

hi.... first of all i would like to introduce myself... my name is johan... right now i'm doing my S1 thesis in information technology..... i...

hi.... first of all i would like to introduce myself... my name is johan... right now i'm doing my S1 thesis in information technology..... i take image restoration topic and.... i'm a newbie in this topic (so... i need a lot of help to understand about the step) and.... i use handbook : image processing theory, algorithms, & architectures by Maher A. Sid-Ahmed it is said that one of the proced...

http://www.robotix.in/ Hello People The Robotix Team of IIT Kharagpur has shifted to its new site. A new design, new problem...

http://www.robotix.in/ Hello People The Robotix Team of IIT Kharagpur has shifted to its new site. A new design, new problem statements. Please visit www.robotix.in for details. The Image Processing event can be reached at http://www.robotix.in/image.php

hello, I have a question about image processing and Matlab :). How is it possible to do radial/circular average of 2D FFT. I have an image, I...

hello, I have a question about image processing and Matlab :). How is it possible to do radial/circular average of 2D FFT. I have an image, I did 2D FFT on it, and now I would like to have amplitude over r (r = radius). So, the 2D FFT of my image represents a "spot" now, so I would like to take different values of radius r (to say 10-20, for example), for every radius to calculate the mean v...

Hi, I have been searching for a lecture series on Digital image Processing. Not just a set of lecture notes, but a classroom lecture series....

Hi, I have been searching for a lecture series on Digital image Processing. Not just a set of lecture notes, but a classroom lecture series. I am sure that there is some university somewhere that has recorded a course on Image Processing. Thank You Tom tom_cip_11551@hotmail.com

John Costella schrieb: > 12:30 pm CST, November 22, 2007 > > > I am pleased to announce the release of a new image format, which I > ...

John Costella schrieb: > 12:30 pm CST, November 22, 2007 > > > I am pleased to announce the release of a new image format, which I > have somewhat mischievously dubbed "JPEG-Clear", which is optimized > for the following uses, among others: > > * Transmission of images or image sequences compressed losslessly or > lossily through a limited bandwidth channel (such as the Internet), >

John Costella schrieb: > Thanks, mate; I've tried to break it but my resources are limited. > (Would be much easier if my name was Bill...

John Costella schrieb: > Thanks, mate; I've tried to break it but my resources are limited. > (Would be much easier if my name was Bill Gates, but then > everyone would be throwing things at me.) Could you send me > the image that killed it? (Or are you telling me that it dies for all > images with that build?) Pretty any image does that, see below for what I believe the problem is. >

I made a similar post sci.image.processing a while back. I'm trying to understand why a my natural images are higher entropy than...

I made a similar post sci.image.processing a while back. I'm trying to understand why a my natural images are higher entropy than uniform noise. The order from lowest to highest is constant (0 obviously), uniform noise, LPF'd image, same image not LPF'd, gaussian noise My theoretical calculation for uniform noise agrees with what I'm getting -- about 1/256*log2(256)*241^2. Now there a...

Hello All, I found octave to be good for signal processing applications. But is octave good for doing image processing too? The...

Hello All, I found octave to be good for signal processing applications. But is octave good for doing image processing too? The reason why I am asking this, is sometimes back I was using scilab for image processing applications. when I ventured more in depth I found it to be dead slow for processing large amounts of data, and specially if there were any ...

Let's say I have an image, which is 100 x 100. Each pixel is currently a real number, between 0 and 1. Totally there are 10000...

Let's say I have an image, which is 100 x 100. Each pixel is currently a real number, between 0 and 1. Totally there are 10000 pixels. The goal is to use DCT to reduce the 10000 pixels to hopefully 100 pixels, just like those DCTs in JPEG... Because there is an obvious pattern in the 100 x 100 image. What's the most convenient way to do it in Matlab? Thanks!

Hi, I like to know the procedure to subsample an image in frequency domain For example Image = ...

Hi, I like to know the procedure to subsample an image in frequency domain For example Image = 121 122 131 141 123 132 141 152 101 97 191 120 100 41 40 78 Sub sampled image is average of 2X2 sub matrix without overlap Result ------------ Sub ...

I have image 256*256 , i compressed it using the Block Processing 'block' to be 128*128, and i want to encode it by reed solomon . so i export...

I have image 256*256 , i compressed it using the Block Processing 'block' to be 128*128, and i want to encode it by reed solomon . so i export it to the workspace using yout block and encode it by rsenc as follows: p=gf(yout,8) code=rsenc(p,138,128) d=rsdec(code,138,128) and this works fine but i want now to reconstruct the image after it had been decoded as variables , d and code are o...

Hi, I am trying to segment an image according to color, i am trying to achieve that using mean-shift segmentation. Segmentation should be...

Hi, I am trying to segment an image according to color, i am trying to achieve that using mean-shift segmentation. Segmentation should be according to color and position ( not intensity ) The Algorithm in a nutshell 1.The image is split to regions 2.For each region the kernel of each of it’s associated pixels is calculated 3.The region centroid is moved to the position maximizing the

Hi, I am considering usage of the Mean-Shift algorithm to classify local maxima in gray scale image ( result of Hough Transform for lines...

Hi, I am considering usage of the Mean-Shift algorithm to classify local maxima in gray scale image ( result of Hough Transform for lines ). For mean calculation I use the center of mass formula ( having Luma as the mass ). The mean shift procedure: 1. Define a radius, e.g. 6 2. For each 12x12 box in the image a. Calculate the center of mass b. Shift the 12x12 box center to the re...

Hi there, Suppose an image is out-of-focus blurred. We have the original image and its blurred version. What is the best approach to estimate...

Hi there, Suppose an image is out-of-focus blurred. We have the original image and its blurred version. What is the best approach to estimate the blur function? That is, given y(m), x(m), how to we estimate the point spread function (or impulse response function) h(m): y(m) = h(m)*x(m) + n(m) where n(m) is some kind of background noise. We are expecting to use some kind of minimized...