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[WM]: Re: question about one-bit and multiple-bit watermark and ask for papers
Dear Anna,
There are some theses which describe very clear about watermarking, state of the art of those researches. Contact me I can send you
pdf.
Sincerely
Tdhien
----- Original Message -----
From: "Xiaohong Pang" <xhpang@hotmail.co.uk>
Sent: Wednesday, June 08, 2005 11:21 PM
Subject: Re: question about one-bit and multiple-bit watermark and ask for papers
> Dear Thai,Hien Duy:
>
> Thank you for your explain. Yes, you are right, I just were confused
> after I read the two papers you mentioned in the email. I
> misunderstand from paper "Ching-Yung Lin, "Public Watermarking
> Surviving General Scaling and
> Cropping: An Application for Print-and-Scan Process", ACM Multimedia
> 99, Orlando, FL, USA, Oct 1999".
>
> Now I make clear that the on-bit/mulitple-bit watermark represents the
> payload of watermark; while public/privite watermark( also referred to
> blind/non-blind watermark) represents the detection/extraction methord.
> There are no necessary relations between them.
>
> Thanks,
>
> Anna
>
>
>>From: "Thai, Hien Duy" <tdhien@augusta.eee.u-ryukyu.ac.jp>
>>To: <watermarking@watermarkingworld.org>
>>Subject: Re: question about one-bit and multiple-bit watermark and ask
>>for papers
>>Date: Wed, 8 Jun 2005 17:13:15 +0900
>>
>>Dear Anna,
>>
>>
>>
>>Go back to the original watermarking model, there are two main steps:
>>the watermark embedding and watermark detection/extraction. The
>>embedding process is input a watermark, and a key..etc. The output of
>>the embedding process is a new digital image (watermarked image). The
>>payload of a watermark is the amount of information (measured in
>>bits). Payloads of watermarks may vary from one bit of information to
>>several bits-bytes of information. Of course, larger payloads are
>>preferable, but depend on the invisible of watermark or called the
>>trade off between the robustness and the capacity.
>>
>>For example the patchwork algorithm - may be the simplest form of a
>>watermark which provides a payload of one bit.
>>
>>
>>
>>>said that the one-bit watermark
>>>is,also referred to as semi-private watermakring, at detection a
>>>binary decision is made as to the presence of the watermark most
>>>often using the hypothesis testing; The multiple-bit watermark,also
>>>referred to as blind watermarking, extracts the embedded information
>>>of the watermark. This defination was given from the detection
>>>aspect.
>>>
>>
>>I do not agree with your statement you may misunderstand from paper
>>
>>
>>
>>Ching-Yung Lin, "Public Watermarking Surviving General Scaling and
>>Cropping: An
>>
>>Application for Print-and-Scan Process", ACM Multimedia 99, Orlando,
>>FL, USA, Oct 1999
>>
>>
>>
>>Cited
>>
>>"Several types of watermarking systems have been proposed since 1990 [1].
>>Among them, public watermarking is considered to have a broader
>>application value, because it can detect the watermarks without the
>>original object. There are two types of public watermarking systems:
>>one-bit watermark and
>>
>>multiple-bit watermark [2]. The one-bit public watermarking system
>>(also referred to as semi-private watermarking) detects the existence
>>of a specific identification watermark in the multimedia content. It
>>usually serves as evidence of ownership. The multiplebit public
>>watermarking system (or blind watermarking) extracts the embedded
>>information of the watermark. It is usually used for data hiding or ownership declaration."
>>
>>
>>
>>Read this papers also
>>
>>J. Fridrich "Comparing Robustness of Watermarking Techniques," SPIE
>>Security and Watermarking of Multimedia Content, San Jose, CA, Jan
>>1999
>>
>>
>>
>>tdhien
>>
>>
>>
>>----- Original Message ----- From: "Xiaohong Pang"
>><xhpang@hotmail.co.uk>
>>To: <watermarking@watermarkingworld.org>
>>Sent: Wednesday, June 08, 2005 2:15 AM
>>Subject: [WM]: question about one-bit and multiple-bit watermark and
>>ask for papers
>>
>>
>>>Hi, watermarkers:
>>>
>>>1.
>>>
>>>I am confused about the defination of one-bit watermark and
>>>multiple-bit watermark. Some papers said that the one-bit watermark
>>>is,also referred to as semi-private watermakring, at detection a
>>>binary decision is made as to the presence of the watermark most
>>>often using the hypothesis testing; The multiple-bit watermark,also
>>>referred to as blind watermarking, extracts the embedded information
>>>of the watermark. This defination was given from the detection
>>>aspect.
>>>
>>>While other literatures mentioned one-bit watermark or multiple-bit
>>>watermark in the aspect of payload( the information embedded in the
>>>original image). I can be easy to understand embeding a multiple-bit
>>>watermark in the original image(or other multimedia content). But is
>>>it possible only embed 1 bit watermark?
>>>
>>>Could anybody tell me the real meaning of one-bit watermark and
>>>multiple-bit watermark and give me a clear explanation?
>>>
>>>2.
>>>
>>>Does anybody have the following papers and could you sent them to me?
>>>
>>>(1) S.Pereira,J.J.K.O Ruanaidh,and T. Pun. Secure robust digital image
>>>watermarking using the lapped orthogonal transform. In ISET/SPIE
>>>Electronic Imaging'99. San Jose,CA,USA, January 1999.
>>>
>>>(2) S. Pereira and T.Pun. Fast robust template matching for affine
>>>resistant watermarks. In 3rd International Information Hiding
>>>Workshop, Dreseden, Germany,September 1999.
>>>
>>>
>>>Thanks,
>>>
>>>Anna
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