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Re: [WM]: Re: question about one-bit and multiple-bit watermark and ask for papers
Hello,
Reading what you just cited. It is reffered as one bit is semi private watermarking and multi bit as blind watermarking, now there
is no connection of a single bit or multi bit watermarking with its blindness, as of my limited knowledge.
Blind watermarking is achieved if the original source is not required, please correct me if i'm wrong.
Regards,
Musstanser Tinauli
"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 andmultiple-bit watermark [2].
The one-bit public watermarking system (also referred to as semi-private
watermarking) detects the existence of a specific identification watermar= k 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 fo= r data hiding or ownership declaration."
> 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
Musstanser Tinauli
Research Officer
Multimedia University
Jalan Multimedia
63100 Cyberjaya
Selangor Malaysia
Mb: +60 12 3967406
Tel: 603 - 8312 5609
Fax: 603 - 8312 5609
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