I am trying to determine the best solution for real time image/video processing in hardware... Does anyone have any thoughts as to which...

I am trying to determine the best solution for real time image/video processing in hardware... Does anyone have any thoughts as to which solution (FPGA or DSP uP) is better. I would like to run several (roughly 10) convolution filters as well as perform image histogram equalization operations on each frame of a gray 640x480 frame at a rate of about 15 fps. Any comments would be most appr...

Hi I have an application where I'm using a functiongenerator and a scope to do network analysis. The function generator is programmed at...

Hi I have an application where I'm using a functiongenerator and a scope to do network analysis. The function generator is programmed at various sine frequencies and the scope captures an image per freq. and this image is download to the PC for analysis. For both A and B channel on the scope the magnitude and phase relationship is found and the gain is found by (A/B), the phase by A-B H...

My name is Barry Kahn and I'm the DSP R&D Manager for Silicon Optix. I am posting this message to invite talented engineers to join...

My name is Barry Kahn and I'm the DSP R&D Manager for Silicon Optix. I am posting this message to invite talented engineers to join our algorithm development team at the Teranex division in Orlando, Florida. More precisely, we are looking for engineers with a passion for image processing. Not only will you be developing cutting edge video applications, but you will get to host them on a SIM...

I've started using a simple windowing function to low pass filter a 2D image. Following the FFT, I multiply in the frequency domain with...

I've started using a simple windowing function to low pass filter a 2D image. Following the FFT, I multiply in the frequency domain with a function that increases with distance from the origin (allowing for wrapping). Then I IFFT back to the image domain. Basically the window is this: f = sqrt(alpha / (alpha + x^2 + y^2)) where x,y range from 1-n/2 to n/2 and alpha is a scalar. Anyone k...

Dear All, I am trying to get images from the google image search engine to my hard-disk. I managed to query the google through the following...

Dear All, I am trying to get images from the google image search engine to my hard-disk. I managed to query the google through the following in matlab. web(['http://images.google.com/images?q= mario ] What I need is to find a way /code in Matlab to download the images found to a directory on my harddisk for further processing. Is there anyone there that can help me out? I need it f...

Dear All, I've made an image, which when no password (0xFFFF's) on CSM are programmed, boots fine. But when a password is set in the CSM...

Dear All, I've made an image, which when no password (0xFFFF's) on CSM are programmed, boots fine. But when a password is set in the CSM it doesn't run. And because I can not use the debugger I have no idea what is happening. Who has a idea what could be causing this? Greetings Frank

Hi..All, I have started to work on Image processing. I have used Cross- correlation to find the match between two images. Now, I want...

Hi..All, I have started to work on Image processing. I have used Cross- correlation to find the match between two images. Now, I want to remove barrel distortion from the sample image. But I don't know the algorithm to remove barrel distortion. Does any one have any idea of the same ? Thanks in advance..

hi guys, what is actually image processing algorithm and how to describe it? regards.

hi guys, what is actually image processing algorithm and how to describe it? regards.

I have been struggling to figure out some strange results from FFTW. I get a angled banding in the DFT and the inverse gives an image that...

I have been struggling to figure out some strange results from FFTW. I get a angled banding in the DFT and the inverse gives an image that looks generally OK except that the signal varies periodically, consistent with those bands, by up to 1% above and below the original image signal. I have put some picture and description here: http://www.mirametrics.com/pub/fftw_strange_results.htm I hav...

Hello all, I am trying to add noise of 5dB to an image in matlab according to the following steps SNR = 5; Id = double(Io) / 255; v =...

Hello all, I am trying to add noise of 5dB to an image in matlab according to the following steps SNR = 5; Id = double(Io) / 255; v = var(Id(:)) / 10^(SNR/10); I_my_noisy = imnoise(Id, 'gaussian', 0, v); but when I measure the SNR by using the matlab command [peaksnr,snr] = psnr(I_my_noisy, Id) I get SNR equal 10. So, what is the wrong in my code? and why the result differ from...

I am working on a project using the Image Acquisition Toolbox. I am trying to read frames from the input received on the tuner/capture card. The...

I am working on a project using the Image Acquisition Toolbox. I am trying to read frames from the input received on the tuner/capture card. The code that i am using goes likes this: obj = videoinput('winvideo'); start(obj); preview(obj); The trigger type by default is set at 'immediate' and number of frames to be acquired is 10. But, the problem is that the preview window shows the ...

I am trying to implement a low pass Wiener filter using the mean- squared method, to provide elimination of noisy areas, background texture...

I am trying to implement a low pass Wiener filter using the mean- squared method, to provide elimination of noisy areas, background texture smoothing, and contrast enhancement. The algorithm I'm using is (to produce output image Q from input image P), to evaluate a 3x3 neighbourhood for each pixel, and Q(x,y) = mu + [ (sigmasquared - nusquared)/sigmasquared ] ( P (x,y) - mu ) Wher...

Hi all, I read into the "imresize" Matlab function and want to understand how does these types of image transformation work... Here is the...

Hi all, I read into the "imresize" Matlab function and want to understand how does these types of image transformation work... Here is the code segment in "imresize"; it uses the "maketform" function. I also studied that "maketform" and attached the example as follows: Can anybody tell me what does "maketform('affine',[.5 0 0; .5 2 0; 0 0 1]);" mean? Especially what does [.5 0 0...

please help me it remains me just one month for present my final project !!!!! and i didn't find yet a solution to my problem!!! my subject is...

please help me it remains me just one month for present my final project !!!!! and i didn't find yet a solution to my problem!!! my subject is an implementation of optimal filter on DSP (image filter) and my problem is that when i introduce the input file (of my image) my output file is always empty (zero).....i think that my problem is what write in ADDRESS field of "probe point" or "load a...

Dear all: I was studying the notch filter. As far as I understood, there are 2 possible ways to accomplish this task: 1) Set the DC component...

Dear all: I was studying the notch filter. As far as I understood, there are 2 possible ways to accomplish this task: 1) Set the DC component of the spectrum to be equal to zero, i.e: F(0,0) =0. To obtain the filtered image, apply the IDFT. 2) Create a kernel (k) having the same size as the filtered image. Set all the kernel values equal to 1, except for the pixel in position (M/ 2,N/2), ...

I understand that the coefficients of discrete Gaussian is normalized before applying(as in the case of smothing),to preserve the dynamic range...

I understand that the coefficients of discrete Gaussian is normalized before applying(as in the case of smothing),to preserve the dynamic range of the input data.In this case,each coefficient is divided by the sum of the (unnormalized)coefficients. If we need the first derivative of a 1-D "image",the image is smoothened(to remove noise-typically Gaussian filter is used) and then forward/ b...

Hi, I have a doubt regarding 1 other project. I have to get the modulation transfer function of an image (and the same image defocused)....

Hi, I have a doubt regarding 1 other project. I have to get the modulation transfer function of an image (and the same image defocused). The defocus is either induced by constructing a bessel filter (similar to airy functions, defocus created by unfocused thin lens). Even though I already designed the filter, I am currently using a webcam to get the defocus by altering the focus of the le...

Hey guys I got a piece of code that uses a matrix 256 by 256. A set of x and y coordinates are given which can be seen on the image when the...

Hey guys I got a piece of code that uses a matrix 256 by 256. A set of x and y coordinates are given which can be seen on the image when the code is executed (code shown below). You will see in the image that the coordinates create 3 half circle. I want help with increasing the gap between these half circles maybe by using the radius. If possible in a loop so it does the increasing method step...

Please Can Any one help me to write pseudo code for run length code representation of an image each run encodes the row number and the start and...

Please Can Any one help me to write pseudo code for run length code representation of an image each run encodes the row number and the start and end pixel column of a run

Hi All I have a BEng in Electrical and a solid background in C++. I am very familiar with DSP theory from self-study only. I have familiarity...

Hi All I have a BEng in Electrical and a solid background in C++. I am very familiar with DSP theory from self-study only. I have familiarity good with MATLAB. Recently I bought Embedded Image Processing on the TMS320C6000=99 DSP. Soon I plan to buy the C6416 DSK development platform to practice the exercises involving MATLAB, Code Composer Studio, and C. The topics covered are advanced li...