MODI ocr

[SuitedAces]

I have neen experimenting with optical character recognition using the microsoft office document imagining library.

I used a sample code from msdn, which I modified a little.
It works great for the images I tested if they are in grayscale, color images aren't as consistent.

So my question is whether anyone knows how I can go about converting an image to grayscale ?

Is there another library I can reference for that purpose ?
Or an API ?

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[SuitedAces]

Or create an image control and change the properties ?
Sheet1.Shapes("Picture 3").PictureFormat.ColorType = msoPictureGrayscale

How do I then do I copy it back into the original file or a new file so that i can run it through my ocr sub ?
Or can I somehow refer to the picture control itself in my ocr sub without the need to copy it back to a file ?