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Image normalization and inverse normalization

24 Jul 2007 (Updated 29 Jul 2009)

Performs image normalization and inverse normalization against affine transformation

File Information
Description	An implementation of the image normalization (and inverse normalization) part of P. Dong et al.'s paper: "Digital Watermarking Robust to Geometric Distortions," IEEE Trans. Image Processing, Vol. 14, No. 12, pp. 2140-2150, 2005.
Required Products	Image Processing Toolbox
MATLAB release	MATLAB 7.5 (R2007b)
Zip File Content
Other Files	Archive created by free jZip.url, iminvnorm.m, imnorm.m, lena.tif, license.txt, test.m

Tags for This File
Everyone's Tags	geometric t(2), geometric transformation(3), image moments, image normalization, image registration, inverse normalization
Tags I've Applied
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Comments and Ratings (7)
20 Sep 2007	Manuel Cedillo	Hello. My name is Manuel Cedillo Hernández. I´m student from México City. Your paper "Digital Watermarking Robust to Geometric Distortions" is very interesting. My question in this paper is: How to constructed the watermark ?. The part of CDMA is clear, but the part of convert the signal 1-D in 2-D is not clear. If it is possible, they could clarify this part to me. Thanks.
24 Oct 2007	Serap Kazan	Hello, my name is Serap KAZAN. Image normalization program is very good. But i also need invers normalization codes. If it is possible can you send me. Thanks.
22 Nov 2007	Arunav Dutta	There arises a white rectangular frame in the image after normalization. how to get rid of that??? please suggest
26 Mar 2008	Yuan-Liang Tang	Dear Arunav, The white frame may come from your original image. The program ignores black borders, but not white ones.
29 Jan 2009	hayam	I read the paper "A Multibit Geometrically Robust Image Watermark Based on Zernike Moments" Please, I need the implementation of the paper if it is possible. where I need some help in the part of "dither modulation". ( the implementation steps of the part "dither modulation" is unclear for me.) thanks
29 Jan 2009	hayam	Also , I would ask if anyone use "benchmark" to evaluate watermarking algorithm by matalb code. I need to know, how to use it ?
16 May 2009	khaled Almakadmeh	Dear Sir, I need your help in the following: " image MUST first be normalized w.r.t. scale and translation i.e. centroid of image is at image center, and image has geometrical moment m00 = fixed number/scale." Could you please tell me, if the "imnorm.m" do the above description. so that I can use it as black box. I'm appreciated for your help and support.

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Updates
06 Aug 2007	1. Copyright information is added 2. More comments are added 3. Minor program modification
03 Mar 2008	Du to many inquiries of how to invert a normalized image, some codes were added in 'imnorm.m' such that it returns various transformation matrices. 'iminvnorm.m' then performs the inverse normalization, taking those matrices as inputs.
27 Mar 2008	Bug fixed
31 Mar 2008	1 Add explicit 'XYScale' in the input arguments of 'imtransform' function. 2. Remove 'cutboarder' function.
29 Jul 2009	Bugs fixed and a test file added.

Tag Activity for this File
Tag	Applied By	Date/Time
geometric transformation	Yuan-Liang Tang	22 Oct 2008 09:20:35
image registration	Yuan-Liang Tang	22 Oct 2008 09:20:35
image normalization	Yuan-Liang Tang	22 Oct 2008 09:20:35
inverse normalization	Yuan-Liang Tang	22 Oct 2008 09:20:35
geometric t	Yuan-Liang Tang	22 Oct 2008 09:20:35
image moments	Yuan-Liang Tang	22 Oct 2008 09:20:35
geometric t	khaled Almakadmeh	17 May 2009 14:21:28
geometric transformation	khaled Almakadmeh	17 May 2009 14:21:31
geometric transformation	Chikako Toska	13 Oct 2009 03:39:38

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