If you want to run the demo , you can send email to me(forrest.shi<at>gmail.com, replace <at> with @ please) for requesting, because here I cannot upload zip files.

Here is the snapshot view:

Help to use:

OS                        :  Windows 7

Develop Tool  :  Visual Studio 2003

Develop Lib    :   opencv 2.0   IPP 4.1  DirectShow   GDI+

Step 1: register “chromakeyd.ax” component , here is details

• 1.1 First, copy  some dynamic library files to c:\windows\system32    Those DLLs include  : chromakeyd.ax   ckdll.dll  cxcore200d.dll cv200d.dll highgui200d.dll ippcore.dll ippi20.dll
• 1.2 Check if need other library,  use  dependency.exe  to open chromakeyd.ax, then you will see if there are missing dlls.  For some dll, you can download by google searching.  I downloaded some dlls from http://www.dll-files.com
• 1.3 run “regsvr32 chromakeyd.ax” command to register it.  For windows7 user, you better run “cmd” as adminstrator.

Step 2: double clicking “ChromakeyDemo.exe” to run it, then you will see above snapshot , and you need to do some adjustment for your specific background.

Here is some recommended values for this demo video:

The final image you will see is :

But actually the real one is

What is the magic technology behind it . Yes, it is named as “chromakey” or “digit matte” etc.

In China, we call 色键 ，or 抠像 or 蓝屏绿屏 .

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About 5 years ago , I came across this sort of technology and started to research with fun. Now I realized that this tech

is very useful and powerful.

In spare time, I enjoy researching the algorithm and here i will demonstrate some effects with my own algorithm.

DEMO1 : Hand

Hand on green background first ,

Then I do chromakey things, and get hand on different background images as following ,

Hand1

Hand2

Hand3

Hand4

DEMO2 Chinese Jingju girl

Result

DEMO3 chinese modern girl

now she comes here

some color changed , so I need improve it better.

DEMO4 famous sample

Background image

Result

DEMO5 transparent object

Do you really believe I shot this photo on the background now ?

There are a lot chromakey stories in the world, here is Making a Chroma Key on a low budget

Here is chromakey result  from knol-girl

and

What do you think ?

Send me your green or blue screen photos to forrest.shi@gmail.com , and I can chromakey for you for fun.