CvMat *filter_x=cvCreateMat(1,3,CV_32FC1); filter_x->data.fl[0]=-1;
filter_x->data.fl[1]=0; filter_x->data.fl[2]=1;
CvMat *filter_y=cvCreateMat(3,1,CV_32FC1); filter_y->data.fl[0]=-1;
filter_y->data.fl[1]=0; filter_y->data.fl[2]=1;

IplImage *img_src=cvLoadImage("name",0);

IplImage *img_diff_x=cvCreateImage(cvGetSize(img_src),IPL_DEPTH_32F,1);
IplImage *img_diff_y=cvCreateImage(cvGetSize(img_src),IPL_DEPTH_32F,1);

IplImage *img_32f=cvCreateImage(cvGetSize(img_src),IPL_DEPTH_32F,1);

cvConvert(img_src,img_32f);

cvFilter2D(img_32f,filter_x,img_diff_x);
cvFilter2D(img_32f,filter_y,img_diff_y);

IplImage *magnitude=cvCreateImage(cvGetSize(img_src),IPL_DEPTH_32F,1);
IplImage *orientation=cvCreateImage(cvGetSize(img_src),IPL_DEPTH_32F,1);

cvCartToPolar(img_diff_x, img_diff_y, magnitude, orientation, 1);

Convert any media file format (Documents, Images, Audio, Video & Archives) without buying or installing anything on your PC

wanna be a pop star kimi wo motto muchuu ni sasete ageru kara ne
kirakira no pop star hane wo hiroge mahou wo kakete ageyou kimidake ni

kimi ni deaeta yorokobito, kimi ni aenai samishisa no
ryouhou wo te ni irete, koi wa hashiridasu
sora mo tobenai boku dakedo, kodoku wo utau yoru dakedo
sono hoho ni, hohoemi wo ataerareta nara
hajimete kimi wo dakishimeta shunkan ni
kamisama ga boku ni kudashita shimei wa kimi dake no Hero

i wanna be a pop star kimi wo motto muchuu ni sasete ageru kara ne
kirakira no pop star hane wo hiroge, mahou wo kakete ageyou
i wanna be a pop star kimi wo gyutto, dakishimete ageru kara oide
kirakira no pop star hane wo hiroge, mahou wo kakete ageyou, kimi dakeni

kakushite itai kurayami mo, kimi wa sotto hiroi agete
taisetsu na boku nanda to, dakishimete kureta
hikari eto tsuzuku, michi aruite yukou
kizu kabau, kono migite wa, kimi to te wo tsunagu tame ni

you’re gonna be my pop star boku wo motto muchuu ni saseteyo hohoende
kirakira no pop star sono hitomi de, boku ni mahou wo kakete
you’re my only pop star boku wo gyutto, dakishimetara mou hanasanai
kirakira no pop star sono hitomi de, boku ni mahou wo kakete ima sugu ni

koi ni ochitara daremo ga dareka no pop star
kamisama ga bokuni kudashita shimei wa kimi dake no Hero

i wanna be a pop star kimi wo motto muchuu ni sasete ageru kara ne
kirakira no pop star hane wo hiroge, mahou wo kakete ageyou
i wanna be a pop star kimi wo gyutto, dakishimete ageru kara oide
kirakira no pop star hane wo hiroge, mahou wo kakete ageyou, kimi dakeni

As you may know, Tsukuba mountain has two picks: One pick is associated with a girl. The second is associated with boy. There is a myth that this mountain bring love and bring couple together.

May be it is true. I met my wife there and I am living a romantic love story.

Here are some of my pictures I took there.

for(iter = list.begin(); iter != list.end(); ++iter)
{
// your code
iter = list.erase(iter);
--iter;
// your code
}

It looks basic but it took me a while to figure it out so I wanted to share in case somebody need it.