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Error Concealment | JPEG | MPEG-4 | Wavelet | YUV

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Discussion Groups | Image Signal Processing

Technical Discussions related to Image Processing (image coding, compression, digital effects, mpeg, etc)

  

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Size of macroblock in MPEG

ambi...@yahoo.co.in - Mar 15 2010
Hi all, I have a doubt regarding the size of macro block in compressed video namely MPEG-4. Will the size of macro block vary within the compressed domain.In a paper,I have read t... Size of macroblock in MPEG

Internal Structure of an MPEG Frame   [2 Articles]

ambi...@yahoo.co.in - Mar 10 2010
Hi, I want to know the internal structure of an MPEG frame.I am doing my project on "motion detection in the compressed domain".So my first step of the project is to parse the MPE... Internal Structure of an MPEG Frame

Real time Image Processing

trombokinase356 - Feb 23 2010
Hello there, I am very new to real time processing but very experienced with image processing algorithms. I was just wondering what it takes to get my hands on? What devices and... Real time Image Processing

Test images for iamge rectification

Emilio_Díaz - Feb 22 2010
Hi all I'm working on an application that rectifies images by means of the direct linear transform (dlt). Right now, my application works with some of my images, but in other... Test images for iamge rectification

Difference between density estimation and edge detection

tony...@gmail.com - Feb 10 2010
Hello what is the difference between density estimation and edge detection in an image.what is the significance of density estimation in an image ... Difference between density estimation and edge detection

3D Modeling Techniques or Methods

zarrar javaid - Feb 10 2010
Hi, Can anybody suggest some 3D Modeling Techniques or Methods? I know finite element model is one of them, can anybody suggest some other techniques? Thanks in advance. Che... 3D Modeling Techniques or Methods

Text Detection - Stroke Filter

svlada19 - Jan 23 2010
Hello, I am new into Image Processing, and I have started simple project for recognizing text on images with complex background. I want to use stroke filter as first step, but ... Text Detection - Stroke Filter

Re: dividing the image pixels into different color bins

BRIJESH JAJAL - Jan 21 2010
Dear, if you have matlab, it has following code that seperates 3 color values: i=imread('sample.bmp','bmp'); % Save Bitmap 24 bit format in Array I 'Loop the value of a starting ... Re: dividing the image pixels into different color bins

dividing the image pixels into different color bins...

"neel............................." - Jan 20 2010
hi all.... i have a color image...and i want to classify the image pixels into different color bins....example......different shades of a given color should be there in the bin fo... dividing the image pixels into different color bins...

How to detection similarity of two Image   [9 Articles]

mohammad - Jan 12 2010
dear all members I am trying to find rate of difference or rate of similarity of two Images. anyone can give me any Idea ? for example : if we have 2 Image : im1.jpg and im2.j... How to detection similarity of two Image

How to detection similarity of two Image

samuel tamiru - Jan 8 2010
You know comparing images is highly subjective task, and Corr2, SNR, RMS .. and more .. but all this techniques have their own deficiency and there are some litratures on a robust ... How to detection similarity of two Image

surface feature detection for 3d meshes

Juan Vesa - Jan 5 2010
hi, i'm after some references of algorithms/techniques which explore feature detection on surfaces of 3d meshes. if anyone has any references or places to start looking coul... surface feature detection for 3d meshes

2d Discrete Wavelet Transform

"bal...@ymail.com" - Dec 29 2009
I want to do feature extraction on a image using wavelet transform(in JAVA). Can anyone give me the algorithm or the method to do this? Is there any book that can help me? ... 2d Discrete Wavelet Transform

Peak detection

kian zarrin - Nov 17 2009
Hi, I want to detect corners and i need a good and fast peek detection method. i have searched the Internet and found one ( MATLAB function : findpeaks) but i cant find the one ... Peak detection

minima detection

Harish - Nov 17 2009
Hi, Given an autocorrelation function which has a peak at time instant 0 and almost zero values at any other time, I need to find the immediate minima after t=0 ? Any suggestions... minima detection

2D FFT & IFFT OpenCV

c_oz...@yahoo.com - Nov 13 2009
Hello All!! I am really surprised by the fact that no mater how hard I used my googling skills, I couldn't find a simple code that shows how to take 2D FFT of an image, AND GO B... 2D FFT & IFFT OpenCV

Real time Video capturing using Matlab and USB CAMERA

davu...@yahoo.co.in - Nov 12 2009
Hi all This is vijay., I am interested to do a project for video compression using MATLAB. I have to take real time video and then i have to compress data then i have to transfer... Real time Video capturing using Matlab and USB CAMERA

help reading images   [3 Articles]

Rajesh Ghole - Oct 26 2009
Hi I am new to image processing using embedded systems i am starting with code composer studio 4.0 simulation on target C64X i want to know if there are API for reading bmp /... help reading images

gradian of an image??

mehrnazf - Oct 22 2009
hi can anybody help me find the gradient of an image in horizontal or vertical direction . in any desired point???? thanks for your helps in advance. ... gradian of an  image??

Horizontal Edge detection using Canny   [2 Articles]

Arijit Biswas - Oct 15 2009
Hi all: I want to use the Canny edge detector for detecting horizontal edges/lines only. Is it possible to do that? Which are the most important tuning parameters to make it w... Horizontal Edge detection using Canny

Can image processing be done using TMS320VC5416?

laks...@yahoo.com - Oct 15 2009
Im not exposed much to DSP programming but decided to do my project on image processing. Can anyone tell me if image processing cannot be done using C5416 kit? I need to process a ... Can image processing be done using TMS320VC5416?

Middle frequency DCT coefficients

ljmr...@yahoo.com - Oct 14 2009
Hi, I am working on a project in which I apply DCT on an image and have to select middle frequency coefficients for watermark embedding. Is there any way that I can determine whi... Middle frequency DCT coefficients

=?windows-1256?Q?Contourlet?= =?windows-1256?Q?=FE?=

Muhammad Anoosh - Sep 13 2009
Hi, Can somebody please help me in designing some images which demonstrates 'comprehensively' how the contourlet reduces image scales. Cheers AN ... =?windows-1256?Q?Contourlet?= =?windows-1256?Q?=FE?=

image reconstruction

gabriel scarmana - Sep 11 2009
Hi there =A0 1) What I am trying to do:=A0=20 To define a code=A0that allow the reconstruction of an image which has unde= rgone heavy sub sampling before being transmitted to ... image reconstruction

How to design a generic anti-aliasing filter ?

sand...@einfochips.com - Aug 20 2009
Hi All, I am downsampling an image by a factor which can vary at runtime. I am aware of the techniques to design a anti-aliasing low pass filter where cut-off frequency is fixed... How to design a generic anti-aliasing filter ?

Transfrom to Compress High frequency signal in Image   [2 Articles]

fido...@gmail.com - Aug 14 2009
Hi All, I need to compress High frequency signals like edges in an image. I have an image taken from the difference of smoothen and un-smoothen image(all the edges preserved).... Transfrom to Compress High frequency signal in Image

Area covered by the pixel   [2 Articles]

cole...@gmail.com - Aug 12 2009
I've an image read into matlab as matrix.I'll like to determine the area covered by the pixels of certain value. I don't have image toolbox processing. I'll like do the coding dir... Area covered by the pixel

Determine mean from set of images   [3 Articles]

cole...@gmail.com - Aug 12 2009
I want determine the picture with the highest mean from a set of images loaded into matlab as matrix. The code is below. I want to know the exact picture with the highest mean so a... Determine mean from set of images

Bicubic Interpolation for YUV

Genial Fido - Aug 9 2009
Hi All, Is there any source code online in c or c++ for Bicubic Interpolation which can accept YUV format as an input. Thanks fido ... Bicubic Interpolation for YUV

image overlay formatting question

vlya...@gmail.com - Aug 5 2009
Hello, I am working on image processing application where aerial image has to be overlayed with topographic map image, based on the camera's GPS coordinates. I am looking for the... image overlay formatting question

Applications for fusing an image from two sensors (for example Visual and IR)

cull...@rokaconsulting.com - Aug 5 2009
Can anyone think of applications for a system that can fuse data from two sensors into one visual stream? What could you do if you could have one image with both visual and IR info... Applications for fusing an image from two sensors (for example Visual and IR)

Brigtness enhancement

cole...@gmail.com - Aug 5 2009
I'm working with about 1000 images, which are read into matlab as matrix. But due to variation in the intensity of light(weather condition, AC light) during the time the pictures a... Brigtness enhancement

Inline interpolation 320 to 720

Alex Z - Jun 23 2009
Hello group. I'm dealing now with the task of converting 320x240 RGB video stream (50 fps, progressive) into a standard D1 stream (YCrCb 4:2:2, BT656 sync coded) in order to be ... Inline interpolation 320 to 720

Autoregressive model for Image restoration

Jagadeeswaran R - Jun 19 2009
Hi, Are you aware any usage of Autoregressive model for Image restoration? I am trying to use it to remove a tone interference added to the Image signal. But it is not showing... Autoregressive model for Image restoration

image processing application

tce_shiva - Jun 12 2009
hi, m planning to develop an image processing application using a tool intel's integrated performance primitives as a part of my final year project. This tool basically helps in p... image processing application

Mask Development e.g. Sobel, Laplacian etc   [2 Articles]

zarrar javaid - Jun 11 2009
Hi, Can anybody suggest some good text or techniques for Mask (used for filtering or edge detection) development. Thanks in advance Cheers Zarrar ... Mask Development e.g. Sobel, Laplacian etc

Gaussian Scale Space   [2 Articles]

Donato Richardson - Jun 10 2009
I'm just getting interested in image processing and was reading up about scale spaces. If anyone is familiar with the discipline I have a question. What's the correct way to go a... Gaussian Scale Space

wsq image transfer question

vlya...@gmail.com - Jun 10 2009
Hello, I am working on the project where WSQ coded fingerprint images have to be sent over bandwidth constrained mobile net connection, near real time... Are there any methods ... wsq image transfer question

Moving average

cole...@gmail.com - May 25 2009
I've a matrix with 3000 x 2500 x 3. The matrix is from RGB image. I want carry out moving average around on the matrix (2000,:) which is subset of the main matrix 300p0 x 2500 C... Moving average

Fingerprint Matching: angle calculation in minutiae point

Pranav Patel - May 18 2009
Hello friends, How to find angle theta in minutiae point P(x,y,angle)? I m agle to find the x and y cooordinates but not able to find angle theta. can any one help me i... Fingerprint Matching: angle calculation in minutiae point
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