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Geographical Information System (GIS) is used to collect, manipulate, analyze, and display the geospatial data. The compilation and management of this spatial data is expensive and time consuming task. Due to rapid growth of distributed networks and Internet, it becomes easy to handle data but at the same time it becomes easy to copy or distribute the spatial data. Therefore copyright protection,...
This paper presents a new approach for hiding information in digital audio based on the audio-to-image wavelet transform (A2IWT) and vector quantization (VQ). In our scheme, the cover audio signal is first transformed into an image by utilizing the wavelet transform and re-sampling the coefficients, then the secret data are embedded in the obtained image using a VQ-based image steganographic scheme,...
This paper proposes a novel digital watermarking technique based on BP neural networks in wavelet domain. Firstly, the original image is decomposed by DTCWT, and then the watermark bits are added to the selected coefficients blocks. Because of the learning and adaptive capabilities of neural networks, the trained neural networks can recover the watermark from the watermarked images. Experimental results...
It is a challenging work to design a robust audio watermarking scheme against various attacks. Based on wavelet moment and synchronization code, we propose a new digital audio watermarking algorithm with good auditory quality and reasonable resistance toward desynchronization attacks in this paper. Firstly, the origin digital audio is segmented and then each segment is cut into two parts. Secondly,...
In this contribution a novel method for video error control and concealment is proposed. The system is based on the use of data hiding techniques for transmitting the extra information needed to recover the data lost during transmission. The embedded data is a sub sampled binary version of each key frame of the shot. The embedding is performed by using the Quantization Index Modulation (QIM) scheme...
A bi-watermarking algorithm basing on Contourlet transform is proposed in this paper. The algorithm adopts different methods to insert watermark into the low frequency and high frequency of the host image respectively. Firstly, perform Contourlet transform to the host image, then choose the low frequency to embed the watermark combined with Singular Value Decomposition(SVD), finally, putting coefficients...
Take advantage of the feature that the energy of the image would gather and spread on four components in the subimage after first-order GHM multi-wavelet transform. Propose an information hiding algorithm based on modifying the direction of color mod vector structure (CMVS) of four GHM first-order sub-images (LL2, LH2, HL2 and HH2). The direction of CMVS represents the information. The maximum change...
This paper proposes a novel and effective method to match objects between multiple cameras, which is based on wavelet salient features consisting of color information and salient values at salient points. Learning templates are set up and updated based on salient features in one camera, and used to match objects in the other camera without any geometric constraints. Experiments show the effectiveness...
A new adaptive reversible watermarking algorithm based on wavelet lifting scheme is proposed in this letter. In the algorithm, watermarking image is embedded in the sub-band LL1 generated from 1-level wavelet lifting scheme, and the position information with small size is kept as a secret matrix, the threshold value can be adaptively selected according to the peak-signal to noise rate, such that watermarked...
In this paper, a new wavelet-based copyright proving scheme is proposed. The original image is not required for watermark verification. Moreover, the proposed scheme does not introduce any visual quality degradation into the original image; however, a feature is extracted from the original image and mixed with the watermark to generate a secret key. This secret key is registered for verification....
There are limitations in smaller embedded information capacity, lower accurate rate for positioning embedded location and detection, slower running speed in traditional watermarking algorithm which combines spatial domain and transform domain based on characteristics of human visual system. A fast watermarking algorithm based on quantum evolutionary algorithm is proposed and implemented. We carry...
SIFT (scale invariant feature transform) is an important local invariant feature descriptor. Since its expensive computation, SURF (speeded-up robust features) is proposed. Both of them are designed mainly for gray images. However, color provides valuable information in object description and matching tasks. To overcome the drawback and to increase the descriptor's distinctiveness, this paper presents...
Take advantage of the feature that the energy distribution ratio is approximately 4.5:2.2:2.2:1.1 in the four LL1 sub-images (LL2, LH2, HL2 and HH2) after first-order GHM multi-wavelet transform. Use the feather of image bit plane embedded strategy. Propose an information hiding scheme based on GHM and combination bit plane (CBP). LL2 is embedded module of robust parameters. Embed hiding Information...
One of the main issues of face recognition is to decide what features to represent a face. In this paper, we present a new algorithm that extracts facial features on some fiducial points. 17 fiducial points are automatically located by Active Appearance Models (AAMs) and characterized with Gabor wavelet analysis. The features are evaluated by a face database, which includes more than 400 images of...
In this paper, a wavelet digital watermarking algorithm based on human visual system and watermarking capacity analysis was proposed. Firstly, watermark was scrambled through Arnold transform. Then, the frequency, texture and luminance masking factor of the improvement just noticed difference threshold model can be exploited to compute the watermark embedding intension in wavelet domain. And, with...
In this paper Berkeley wavelet transform (BWT) based watermarking is described. BWT is a two-dimensional triadic wavelet transform. In order to achieve copyright protection, the proposed scheme embeds watermark into host image. The efficiency of the watermarking scheme is supported with the help of experimental results.
In this paper, a new audio watermarking algorithm is proposed to accomplish both copyright protection and content authentication with localization. Compared to the conventional algorithms, the feature of the proposed algorithm is that only an encrypted watermark is embedded in the approximate wavelet coefficients based on the instantaneous mixing model of the independent component analysis (ICA) system...
Robustness is difficult to resolve in digital watermarking research, and contradicts its stealthiness. So the key of designing robust digital watermarking is selecting watermark embedding positions. Around these problems, we study the robust digital watermarking algorithm based on DWT. By wavelet transform, image smoothing based on PDE, and morphology operators (dilation and erosion), we obtain the...
This paper describes a practical several moving objects area extraction using a half-cosine function wavelet network. The network decomposes an image into weighted basis functions corresponding to spatial frequency. In this method, objects are distinguished by using a difference of object's size. First, moving objects area can be extracted from the weight image of the basis functions which constructs...
It should be complete, self-explanatory, and not require reference to the pa A new adaptive reversible watermarking algorithm based on wavelet lifting scheme is proposed in this letter. In the algorithm, watermark is embedded in the sub-band LL1 generated from 1-level wavelet lifting scheme, and the position information with small size is kept as a secret matrix, the threshold T can be adaptive selected...
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