image reconstruction

Started by gabriel scarmana in Image Signal Processing10 years ago

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...

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 a destination point.=20 =A0 2) What for? The sub sampled image is transmitted from an origin point and reconstructed= at the destination point...using a code which allows the reconstruction of= the transmitted=A0i...


Transfrom to Compress High frequency signal in Image

Started by fido...@gmail.com in Image Signal Processing10 years ago 1 reply

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...

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). Please can you tell me any good Transform (other than DCT) which can efficiently compress this image. I have tried DCT but is not so efficient. Which one will be good DST or wavelet transform. Thanks fido


Area covered by the pixel

Started by cole...@gmail.com in Image Signal Processing10 years ago 1 reply

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...

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 directly. Please advise. Thanks for your usual help.


Determine mean from set of images

Started by cole...@gmail.com in Image Signal Processing10 years ago 2 replies

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...

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 as to make it as a basis for further calculation.this picture should be printed. for k = 1:length(jpegFiles) % loop to run large number of pictures filename = jpegFiles(k).name; data = imread(filename); y = mean(m...


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

Started by cull...@rokaconsulting.com in Image Signal Processing10 years ago

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...

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 information, let's say, and it was overlayed/processed such that the best of both could be accentuated? It seems like there may be some good uses, and that in certain circumstances it could help create images that the comput...


Inline interpolation 320 to 720

Started by Alex Z in Image Signal Processing10 years ago

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,...

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 able to interface to virtually any commercial video encoder device. Obviously, the steps of gamma-correction on RGB and then RGB to YCrCb conversion steps shall be done first, and these appear to be obvious. Now, I nee...


Mask Development e.g. Sobel, Laplacian etc

Started by zarrar javaid in Image Signal Processing10 years ago 1 reply

Hi, Can anybody suggest some good text or techniques for Mask (used for filtering or edge detection) development. Thanks in...

Hi, Can anybody suggest some good text or techniques for Mask (used for filtering or edge detection) development. Thanks in advance Cheers Zarrar


Gaussian Scale Space

Started by Donato Richardson in Image Signal Processing10 years ago 1 reply

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...

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 about creating a gaussian scale space? The process of the correct way to apply the gaussian filter to a digital image is where I'm initially having trouble. The digital image is discrete, and the gaussian filter operate...


Acquire frame from DVI signal for automatic picture quality inspection.

Started by albe...@gmail.com in Image Signal Processing10 years ago

Hi to all you. MY PROBLEM DESCRIPTION: I'm working on LCD/Plasma manufacturing on Tijuana, and we want to automate picture...

Hi to all you. MY PROBLEM DESCRIPTION: I'm working on LCD/Plasma manufacturing on Tijuana, and we want to automate picture quality inspection. We have a design, this consist on convert LVDS video signal to DVI, then adjust it to a lCD monitor (to display it) using a scan converter (more than 4K USD the scan converter); Get the image on PC using frame grabbers, and compare the image with a ref...


Image analysis of circular object

Started by colenajayi in Image Signal Processing10 years ago 4 replies

I've a image with a circular object within it. I am interested only in the circular object for further analysis. I've tried several approaches to...

I've a image with a circular object within it. I am interested only in the circular object for further analysis. I've tried several approaches to get the pixel for that circular object. The first approach executed was to equate every matrix outside the circular object to zero but I had a concern, i couldn't zero the edges since my original picture was in square. My other approach is trying to writ...


Ask a Question to the DSPRelated community

To significantly increase your chances of receiving answers, please make sure to:

  1. Use a meaningful title
  2. Express your question clearly and well
  3. Do not use this forum to promote your product, service or business
  4. Write in clear, grammatical, correctly-spelled language
  5. Do not post content that violates a copyright