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Discussion Groups | Image Signal Processing
Technical Discussions related to Image Processing (image coding, compression, digital effects, mpeg, etc)
Wavelet interpolation [2 Articles]
snehamoyc - Mar 11 2009
Hi,
I am working on image interpolation using wavelet transformation. I am doing one level wavelet transformation of my data and interpolating all 4 sub bands and inverse transfor... 
masks: 2 in a row? [4 Articles]
Emilio_Díaz - Mar 6 2009
Hi all
I'm working on masks (prewitt, sobel, mean, etc) with the CImg library. Right now I can apply masks quite well, and I have a question about the next "natural" step.
... Saturation and Intensity Stretching
ac.a...@gmail.com - Mar 6 2009
Hello,
I am performing a project to enhance underwater images.
Predominantly in such pictures, the blue color seems to envelop the image.
I have referred a few texts and found... gaussian filtering [2 Articles]
marc...@gmail.com - Mar 5 2009
Hello forum,
question about gaussian kernel.
take an image 512x512. Does the gaussian filter size (usually and odd size), depend on the standard deviation of the filter?
Wh... Difference of Gaussian Using RLE
fido...@gmail.com - Feb 27 2009
Hi All,
I am trying to write code for difference of Gaussian using Run Length Encoding for edge detection. Please can somebody refer me to any code (website link). I'll use th... Masking - decompose convolution [3 Articles]
kian...@live.co.uk - Feb 25 2009
Hi,
my project for master Eng. involves image masking. it uses A mask of size 8x8. i wish to make the masking process faster(if possible).
with this mask I need 64 MAC per poi... Coding Layers in JPEG2000
mtor...@gmail.com - Feb 23 2009
HI everyone,
I have a confusion related to the concept of use of layring in tier 2 EBCOT in JPEG2000. What I know is that multiple layyers are used for progression by SNR. If we a... Results of ifft2()
zarrar javaid - Feb 20 2009
Hi All,
There is an interesting thing I observed when I take inverse of fft2() by using ifft2() function it only gives me edges of image cameraman.jpg and a white screen for ima... DFT amplitudes
marcoscipioni1 - Feb 20 2009
Hello forum,
question about DFT amplitudes:
in matlab, if I fft2 an image (NxN), how do I get the correct
amplitude for the frequency components? Do I need to divide by N^2?... FFTW usage on images
rech...@consolidated.net - Feb 19 2009
I'm new to using FFTw but have experience with other FFT routines.
My questions about FFTw software are:
In this call planForward = fftw_plan_dft_r2c_2d ( iyLeng, ixLeng, ...