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

Discussion Groups

Discussion Groups | Image Signal Processing

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

  

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Mpeg4 Scalable coding

luok...@yahoo.com.sg - Jun 10 2008
Are there any articles on how mpeg4 does scalable coding? ------------------------------------ ... Mpeg4 Scalable coding

curvelet transform

sumi...@gmail.com - Jun 9 2008
i have started working on image denoising using curvelet transform.if i run the demo program in curvelab toolbox on image processing it shows an error.the error occurs while taking... curvelet transform

Why Gaussian Models ?

fido...@gmail.com - Jun 6 2008
Hi All, I might be asking trivial question,but i am forced to ask. I need to know why is it most of the application in signals processing and image processing use Gaussian mod... Why Gaussian Models ?

2D Discrete Wavelet Transform on images

luok...@yahoo.com.sg - May 26 2008
Hi I am working on scalable coding of images and videos. I do not quite understand how DWT is performed on images (2D DWT). For image compression using Discrete Cosine Transform... 2D Discrete Wavelet Transform on images

Image contrast enhancement

shan chinna - May 25 2008
Hai, Am doing contrast enhancement of MR images. Am in need to calculate Detail variance(DV) and background variance(BV) for quality measurement. can any one help me to kno... Image contrast enhancement

Real time video compression and wireless transmission   [2 Articles]

tony...@yahoo.com - May 7 2008
I'm a student doing a project involving real time video compression and wireless video transmission. Basically I want to take a digital video camera and compress the video in real ... Real time video compression and wireless transmission

Binar File Header

Khalid Latif - May 5 2008
Hi All, I want to read a binary video file (generated by MATLAB using Image & Vidoe Blockset -> sinks -> write binary file) in C. Its the YUV420 format. But I cant ... Binar File Header

MPEG-2 Quantizers

adit...@gmail.com - Apr 3 2008
Hi all, Can anyone please tell me how many quantizers are used for DCT quantization in MPEG-2? Thanks a lot. -Aditya ------------------------------------ ... MPEG-2 Quantizers

Mjpeg and Jpeg

fido...@gmail.com - Mar 24 2008
Hi All, I am graduate student working on a project which requires decoding of Mjpeg stream. Further, i am using this decoded output for processing. I am not sure whether i can u... Mjpeg and Jpeg

Adaptive block size for H.264

khalid latif - Feb 26 2008
Hi, I am modeling the H.264 in simulink. For block processing, we pass a fixed block size like 16x16 or 8x8 or 4x4. Can we pass these parameters in adaptive way like a varia... Adaptive block size for H.264

H.264 Encoder Model in Simulink

khalid latif - Feb 26 2008
Hi, Does any one have the H.264 model in Simulink? I studied the Video Compression demo model available with Video and Image Processing blockset but its a little bit different... H.264 Encoder Model in Simulink

Usefull site for image processing in C++   [5 Articles]

belb...@yahoo.com - Feb 16 2008
Hello everyone, I am having tough time locating some usefull sites for image processing. I am working on a project for color image enhancement. I am using currently, Homomorphic... Usefull site for image processing in C++

Document on Sectional Decoding,Sectional based scaling and Sub region Decoding required   [2 Articles]

"Raja Shekara S.V" - Jan 21 2008
Hi, If anybody has any type of information on Sectional Decoding, Sectional based scaling and Sub region Decoding in JPEG please mail to me If you have .doc or .pdf pleas... Document on Sectional Decoding,Sectional based scaling and Sub region Decoding required

edge detection

p_kdl - Jan 15 2008
Hi, I am learing Image processing. I want to do an edge detection programme without using the masks (sobel, canny,robert..). So the point is, given a image, find the g... edge detection

component analysis in DIP

rama...@gmail.com - Jan 14 2008
can anybody tell me how the implementation of principal component analysis and independent component analysis be made in MATLAB? and what does the term "Statistical Independence" ... component analysis in DIP

image compression

prathima rao - Jan 2 2008
hi all, i badly need a souce code in c for dct image compression , can any send it . thanks in advance warm regards prathima ... image compression

estimating correlated column noise in an image

Vivek Sharma - Dec 18 2007
Hi All, I have an image of the format Nx100, where 100 image sensors generate 100 columns of data to create the final image. I need to estimate the fixed noise (excluding DC... estimating correlated column noise in an image

infrared filter

compaq_m2007 - Dec 8 2007
Hi All, I have an image conatining RGB information. I want to apply an Infrared effect on to it. Tutorials on how to do that in photoshop are available on the net. But what ... infrared filter

Jpg decompression with inadequate RAM   [2 Articles]

"rosarium.pila" - Dec 7 2007
Hello Friends, I am developing an application where I have to do Jpeg decompression. But I don't have enough RAM in my micro controller to store the jpg image. Neither the c... Jpg decompression with inadequate RAM

frequency domain digital image enhancement

mona...@yahoo.co.uk - Nov 29 2007
I am doing a project on the above where I am supposed to develop a DFT based signal processing algorithm that can be used to enhance digital image suffering from variable illuminat... frequency domain digital image enhancement

image reconstruction problem using IDCT

bant...@hotmail.com - Nov 18 2007
Hi, I am trying to apply 8*8blockwiseDCT to raw image and reconstruct it using IDCT. I am completely new to image processing and I am doubtful on the algorithm that I am implem... image reconstruction problem using IDCT

Optical Flow, Help needed in Matlab   [2 Articles]

Soni - Nov 15 2007
Hi All.., I am working on Face authentication, I am stuck up with optical flow. I have calculated the velocities of the motion of 2 images in x and y direction, but how do I g... Optical Flow, Help needed in Matlab

gaussian mixture models

swami nathan - Nov 7 2007
hi all, can someone send me informations or codes for using gaussian mixture models on images ... gaussian mixture models

FVID Planar config in DM6437

Juan Casal - Nov 7 2007
Hi, I am trying to make the planar configuration of the fvid in DM6437 but the FVID fails on creation. Can anybody help me?. Thanks Juan ... FVID Planar config in DM6437

regarding image matching   [2 Articles]

prathima_rao_rao - Nov 7 2007
Hi All, I have newly joined the group. I am working on a project which finds defect in a relay, we r taking images of the relay in all the directions. we have a source image ... regarding image matching

Block matching in motion estimation

mrofouei84 - Nov 5 2007
Hi everyone, I need c or c++ code for block matching in different algorithms (like Exhaustive search, ...) or at least in some. Can anybody send me a link? Thanks ... Block matching in motion estimation

Shadow Detection_Shadow Elimination   [4 Articles]

shoh...@gmail.com - Oct 29 2007
Dear all I am estimating the background with LMS(adaptive filters) in a video surveillances, so I have to detect all the motions. The big problem is shadow, I have to Eliminate... Shadow Detection_Shadow Elimination

adding lines to videos

hey3...@yahoo.com - Oct 22 2007
Hi! how do i add lines when i create an avi file in MATLAB? or how do I include lines in an image without putting it in a figure? particularly in the function 'addframe' in creati... adding lines to videos

analog bandwith

parini26 - Oct 15 2007
Hi! does anyone know how to calculate the analog bandwith of a video stream ? i'm using the image adquisition toolbox and a cctv camera and i want to know the real bandwith of ... analog bandwith

Bandwidth of gray level images

nafi...@gmail.com - Oct 13 2007
What is the effect of quantization(reducing the gray levels) on bandwidth? does it make it wider or lower? thanks ... Bandwidth of gray level images

geodesic distances

swamigmv - Oct 8 2007
hi, do anybody know to calculate the geodesic distance of luminance(or any other ) in an image. thanks in advance ... geodesic distances

DCT coefficient range

michael toon - Oct 3 2007
What ranges for DCT coefficients should i expect with 8x8 image blocks where each pel is 8 bits? thanks, mike. ... DCT coefficient range

Circular Template Matching for Cell Segmentation   [3 Articles]

inder purohit - Oct 3 2007
Hi All, I am working on Cell Segmentation for the detection of cancer cells. The cells are separated from the background using a threshold. Later form factor is used to s... Circular Template Matching for Cell Segmentation

DCT block size h.264

Sandeep - Sep 26 2007
Can a 16x16 macroblock have blocks of different sizes(some 8x8, some 4x4)?? or is it necessary that all the blocks in a macroblock need to be either 8x8 blocks or 4x4 blocks??... DCT block size h.264

gabor filter java implementation

ghalamiamin - Sep 10 2007
I have Implemented a 2D gabor filter by java but it does not work properly Please give me notes about my code thank you package fpFrameWork.process.gaborFilter; import java.... gabor filter java implementation

LMS   [2 Articles]

bena...@yahoo.fr - Sep 10 2007
I'm working on a LMS algorithm,I need a paper or what ever that explains the applied LMS algorithm to images, Could someone please help me? thinks faten ... LMS

DSP+OpenCV   [2 Articles]

univmercury - Sep 10 2007
Hi Euslei, I am also doing an image processing application on BF533 platform. I already have written OpenCV codes for this application, but how to transplant them to the DSP p... DSP+OpenCV

How to calculate the Compression ratio of Wavelet transformed image??

Yeasin Razib - Sep 7 2007
Hi, I'm working with image compression with wavelet transform using different types of wavelets in MATLAB.I did multi-resolution decomposition and reconstructed the image.I've c... How to calculate the Compression ratio of Wavelet transformed image??

Background estimation using LMS algorithm

shoh...@gmail.com - Sep 5 2007
Hello every body I am estimating the background in a video sequence with LMS algorithm, the speed of estimating is very slow,so I am thinking of using the block set, it means tha... Background estimation using LMS algorithm

Overcomplete wavelets for image denoising

Patrick Mineault - Aug 8 2007
Hi all, I'm looking to do denoising on a set of non-natural images; these images come from experiments in visual research. As it turns out, to find out the truly important com... Overcomplete wavelets for image denoising
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