New answers tagged image-processing
1
vote
Related to Additive white Gaussian noise (AWGN)
Additive White Gaussian Noise (AWGN) is typically assumed to be zero mean as this adds random fluctuations around the original signal without biasing it in some way. If there is a non-zero mean in ...
- 32
1
vote
How can I estimate the number of rows and columns in a chess pattern?
If you already have the corners indicated in the image this is relatively easy:
Get the intensity profile of a line a little to the left of the red-green connecting line and count the number of ...
- 11
0
votes
Related to Additive white Gaussian noise (AWGN)
The zero-mean assumption rests on empirical validation. You can do it yourself: turn on an oscilloscope and set it to the minimum amplitude. You'll see noise with roughly zero mean. Intuitively, this ...
- 14.9k
0
votes
Use DFT (`fft()`) to Replicate 2D Convolution (`conv()`)
You have a MATLAB Code as an answer in Replicate MATLAB's conv2() in Frequency Domain.
For discrete signals, the multiplication in frequency domain is equivalent of ...
- 19.3k
2
votes
0
votes
Scaling Property in DFT
But 1/ab is scaling the magnitude.
Here limits are for the indices.
0
votes
byte order of P6 ppm image in C
The problem is in how you read the PPM file:
char buffer[16];
fread(buffer, sizeof(buffer), 1, input);
This means you always read 16 bytes, no matter ...
- 2,359
Top 50 recent answers are included