Matlab

how to plot histogram in 12-bit from an 16-bit image?
hi guys, so in my university project, i need to plot a histogram in 12-bit portrayal (the x-axis is from 0 - 4096 gray values) from an 16-bit image.. with software ImageJ i could do that with no problem at all, i just need to divide the image with 16 (16bit / 16 = 12bit, 65536/16 = 4096) and then i just call the his... 5 Jun 2010 11:24

MATLAB Dynamic tooltips
Hi, I am trying to incorporate a dynamic tooltip for a MATLAB axes object. For an example of what I am looking for, please look at the following link: http://www.dynamicdrive.com/dynamicindex5/dhtmltooltip.htm Is there any way for me to achieve this in MATLAB? Thanks. ... 5 Jun 2010 09:13

Closest point of a simplex to a random point
I have 4 points forming a tetrahedron in 3D space. I also have another point in 3D space which definitely does not lie within the tetrahedron. What I want is to find the point on the tetrahedron that is closest to the point out of it. I'm thinking about using barycentric coordinates and solving a constrained Least sq... 5 Jun 2010 19:06

help for image restore
Hi I have an image with echo. I know that the echo was 5 pixels to Y and 15 to X. I need to do invesrse filtering. I understand that I need to divide the FFT of distored image by the fft of kernel. How can I build such kernel for echo?? Thanks ... 5 Jun 2010 16:54

getting the x and y coordinates of all the pixels in an image
Hi I want to compare some frames of binary images which I extracted from a video. The pixel values are obviously 1s and 0s. I want to get the x and y coordinates of all the pixels having a pixel value of 1 and store them in an excel sheet. How do I do it? Thanks Pragya ... 5 Jun 2010 08:08

Learning time, neural networks
Hi. My question is: how can I get learning time (in secounds) from traing procedure when a use newff network. I know how to get epochs but how to get time in secounds (minutes)? ... 5 Jun 2010 09:13

fprintf cellarray with different data type
Hi I have 3 cellarrays: column1={'1' '1' '1' '1'}% only numbers/numeric data column2={'01-04-2009' '01-04-2009' '01-04-2009' '01-04-2009'}%date column3={'hb' 'hb' 'much better' 'good'}% strings I want to write the 3 cellarrays to a txt-file with 3 columns. I tried fid = fopen('testing.txt','wt'); for... 9 Jun 2010 05:20

BER measurement in DVB-T concatenated coding
Hi everyone! Some question to all. I simulate DVB-T system with concatenated coding. In this system the convolution coding as a inner code and RS code as a outher are used. DVB-T system must operate in QEF mode then BER after Viterbi decoding is equal 10^-4 and BER after RS decoder is equal 10^-11. But then i try to... 5 Jun 2010 08:07

AWGN in OFDM systems (in particular DVB-T)
Hi to all! I need help in following. I simulate DVB-T system with OFDM 2k carriers. In DVB-T system the QAM is used. After OFDM IFFT every QAM constellation point is divided on 2048 (number of carriers). After Guard interval insertion (Length of data block is increased to 2560*1) DVB-T signal is provided to a AWGN cha... 5 Jun 2010 04:55

simmechanics and structure's vibrating freq.
Can simmechanics compute a structure's vibrating frequency? Wanted: Suggestions or examples. Thanks. ... 5 Jun 2010 03:51