首爾二、三事

因為不知道怎麼問「這是幾人份？」，所以最後指著綜合口味的pizza並豎起右手食指！比pizza hut的大pizza小一點，應該可以吃完，不過吃掉3/4後因為還想繼續探險，所以打包了剩下的1/4！可樂也剩下半瓶。因為路上很冷，所以回到旅館時已經是冰pizza跟冰可樂了！（加可樂7000￦）

每天轉電視都有人下棋！看過一局等級似乎不高的棋，所以應該不全是職業棋士在下。如果是以前我一定會很羨慕韓國人！

另外每次轉電視都有一台在播星海一的對戰！

SIGGRAPH ASIA 2010

第一次參加 conference，

paper 好多！

動畫好棒！

韓國好冷！

kMean-2

Iteration = 2

Iteration = 3

Iteration = 4

Iteration = 5

Iteration = 6

Iteration = 7

Iteration = 8

All with k = 6.

kMean

k = 16

k = 8

k = 4

k = 2

All in 2 iterations.

Lua + Image

I usually works with images, and have to write many code even only for a simple testing. Now I try to implement toolkits with Lua, hope that I can do more things by the help of script. With the script below:

function Main()

    local img0 = Urd.CImage32F();
    local img1 = Urd.CImage32F();

    img0:Load("D:/img/NTU/106009.JPG", Urd.ChannelL);


    CImageProcessor.GaussianSmooth(img1, img0, 7, 7, 2.0, 2.0);
    CImageProcessor.OperateImgNImg(img1, img0, img1, Urd.OperatorSub);
    CImageProcessor.OperateImgNScalar(img1, img1, 10.0, Urd.OperatorMul);

    img1:Save("D:/img/ttt.jpg", Urd.ChannelL);

end

I got this result :


They are "C like" since I implement them in C with the same function and class name. Hope this will become useful in a few days.

Blur (Image) - Image

Nothing special, I just wanna update my blog.

G1S was down !

Now I have 2 choices: buy a new PC, or repair G1S. G1S was down, but ASUS never let me down. I won`t buy their notebook again.

塗鴨集

新玩具！

Simple Extension for wxFileDropTarget of wxWidgets

//--------------------------------------------------------------------------
class CWxDnDSink
{
public:
    CWxDnDSink();
    virtual ~CWxDnDSink() = 0;

    virtual Result OnDropFiles(wxCoord x, wxCoord y, const wxArrayString& rFile);
};

//--------------------------------------------------------------------------
class CWxFileDropTarget : public wxFileDropTarget
{
    CWxDnDSink*     pDnDSink;

public:
    CWxFileDropTarget(CWxDnDSink* pSink);
    virtual ~CWxFileDropTarget();

    virtual bool OnDropFiles(wxCoord x, wxCoord y, const wxArrayString& rFile);
};

Then every wxWindow can inherit CWxDnDSink, and SetDropTarget with a CWxFileDropTarget object. Quite simple and useful for me since I don`t want to write new drop target every time (like the dnd sample).

HDR - 8

FINALLY !!!

HDR - 7

Here is better result by using 3 different response curve (red, green & blue) at the same time.

1. Linear tone mapping in log domain :

2. Tone mapping in gradient domain :

3. Response curve :

p.s.

In sampling step, I sort all pixels in the image with largest exposure. Force sampling the brightest pixel, then sampling the others averagely.

Commander Shepard is a Programmer !

Screenshot from Mass Effect 2.

Never thought that "code" would appear in games !

篆刻：帆

HDR - 6

alpha = 0.09

beta = 0.9

s = 0.1

HDR - 5

Some bugs are fixed. Here is new radiance map :

linear tone mapped in log domain :

Gradient attenuation map :

linear mapping after attenuation in log domain :

LDR with exp(I) :

Final result :

There are still some problems :

1. How to get better result from Poisson equation ?

2. How to select alpha & beta ?

3. Final result is not as good as the one presented in original paper.

HDR - 4

I think ...... I didn`t add any special effect ......

HDR - 3

what`s this ? Should I commit suicide ?

HDR - 2

I have tried to impl gradient domain tone mapping recently since the paper said it is "simple". But I still can`t get the correct result.

Above is the result of Poisson equation. After this, I don`t know how to mapping all channels. Below is one of my test which mixed 3 result (rgb) of poission equation.

Hope I can solve it in a few days /_\.

HDR

Recently, I have to check if the knowledge of HDR in my brain is correct. Here are some result :

1. One of Paul Debevec`s data set. Since my camera "can not" manually change shutter speed and I don`t want to implement MTB currently, I test the algorithm by this data set.

2. Rough tone mapped result :

3. Rough radiance map :

The response curve recovery algorithm is not difficult since you can find matlab version in the end of the paper.

篆刻：閑適

好像破得不太夠……