How to convert color of bitmap image?

I am programming with Acrobat 7.
I'd like to change color of all object to CMYK color or gray.
In case of plain object like path or font,
I need to seek CMYK color from the object's RGB color.
and I change the property of the object color space and value with it.
but in case of bitmap image, i don't know how to at all.
it has numerous colors.
I hope your advice.

Thank you both of you.
by the way, Leonard, Could you tell me that APIs more detailly?
I have look into the document for long time. it is still hard to find proper API.
I have to say this again. I am trying to find APIs based on version 7.
I am using custom function ACEconvertColorProfile which is placed in snippetrunner. it consists of these APIS ACMakeColorTransform, ACApplyTransform, and so on.
but I can't find the way to convert bitmaps once and for all.
I hope you give more hint.
Thanks again.

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Regards,
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Nick
Solved!
Go to Solution.
Attachments:
iPhone_Photo.jpg ‏239 KB
FLIR_IR_Monitor.jpg ‏113 KB
NI_VBAI.jpg ‏205 KB

Hello,
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dir sir;
i want to make a programe by it i want to upload image real image and then it converted it for 1 bit image ;
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and if soo what method and package and function helps me to do that .
if you can provide me with simple code i will be thankfull.
beast regards.

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