Discrete Cosine Transform (DCT) Formula

Can anyone please explain to me how to compute DCT? I'm finding it hard to understand it. 2D-DCT dct1 I attached the formulas the Discrete Cosine Transform (DCT) and it's Inverse-DCT.

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sandz24

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Read this:
http://en.wikipedia.org/wiki/Jpeg#Discrete_cosine_transform
I'll see if I can find some source code.

DeanMSands3

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I read something about compression. Should I compressed the image after i watermarked it. I'm basically goint to use DCT for image watermarking.

sandz24

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I'm assuming you mean a visible stamp on the image. Yes, you should compress AFTER watermarking.

DeanMSands3

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No it's an invisible watermark

sandz24

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2 Months Ago

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by which method we can embedded the original image with watermark image?

white_pearl

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how to implement 2-d dct in xilinx?

white_pearl

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