Input Chinese in Ubuntu(输入中文)

I follow the guidance of website "http://ubuntuforums.org/showthread.php?p=124214".
1. Install libraries:
* scim
* scim-chinese
* scim-config-socket
* scim-frontend-socket
* scim-gtk2-immodule
* scim-server-socket
* scim-tables-zh (option)
* xfonts-intl-chinese
* xfonts-intl-chinese-big
* ttf-arphic-gbsn00lp
* ttf-arphic-gkai00mp
* ttf-arphic-bkai00mp
* ttf-arphic-bsmi00lp


2, Open a terminal,
$gvim .xsession

Type
"
scim -d
export XMODIFIERS=@im=scim
export GTK_IM_MODULE=scim
gnome-session
"

Then save .xsession under your home direcotry.

$chomd +x .xsession



Restart X server by CTRL+ALT+BACKSPACE

Activate the chinese input by CTRL+SPACE.

Finally I got it. Very cool, just feel a little strange.

现在可以用中文咯。。。。。嘻嘻。。。




This method is dead in June, 2010.


But I find a solution:
$sudo apt-get install scim-qtimm im-switch scim-pinyin
$im-switch -z en_US -s scim

It works again......你看到了吧。。。死掉的SCIM又活回来了。。

Take your work seriously

As,,,,
1. You are living on it.
2. Your boss pay for your work.
3. The only way to get successful feeling.


Don't let noise to let your work down.

Make clear to work and to life.

EKF or UKF?

For non linear system, the most important way to solve it is make it linear. The well known method is using Taylor formula. EKF is using Taylor formula to linear state equation and measure equation. And assuming the noise obey Gaussian.

But Taylor linear method is not the only way, the other way is using uncented transform to linearize the state equation and/or measure equation. It also assumes Gaussian noise.

get real disparity map from OpenCV function cvFindStereoCorrespondenceBM()

The function cvFindStereoCorrespondenceBM() can give you a disparity map, but it's not real disparity map which we used to reconstruct real 3D world.

I have checked the source code and find this function uses Bitwise operator to shift the real disparity value. For false matching points, it give a certain value which is left shifted version of 'mindisp-1', here mindisp is the minimum disparity value. In this function, it shift 4 bits, which means if mindisp=-64, then after shifted , it become -1040; Shifting 4 bits equal the value*2^4; Here -1040=(-64-1)*2^4;

As I don't exactly sure if it's same shift way for right matching points, so leave this question to the authors. But If I unshift all datas, I find all disparity value go to the right range, it seems for all the disparity, the author left shift 4 bits. If it's true, then we can get real disparity map by

disp_real=(disp_shifted/2^4)+1

Visit the Multi-channel data for Opencv Image and Matrix data

According the data structure of IplImage and CvMat, assuming we have a matrix M[m*n*c], which m is row's number, n is column number, c is channel' number. If the data type is float, then we can get the value of M(i,j,k):

M(i,j)=M.data.fl[i*n*c+j*c+k];

for double, short or uchar data:
M(i,j)=M.data.db[i*n*c+j*c+k];
M(i,j)=M.data.s[i*n*c+j*c+k];
M(i,j)=M.data.ptr[i*n*c+j*c+k];

If M is a IplImage data type, then we have:
M(i,j)=M->imagedata[i*n*c+j*c+k];

Check disk Usage by "du"

For example:

$ du -s -m *

Here -s means dont show children folder. -m means show in MB

Dual IP on one internet card

For Ubuntu do :
$ cd /etc/network/
$ sudo vi interfaces

Then add follow line in:
If your 1st ip config is:

iface eth0 inet static
address 172.xxx.xxx.xxx
netmask 255.255.xxx.xxx
...
auto eth0

Now add 2th ip :

iface eth0:1 inet static
address 192.xxx.xxx.xxx
netmask 255.255.xxx.xxx
auto eth0:1


do:
#sudo /etc/init.d/networking restart