The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Lip detection is the major and important step in the lip-reading system. In this paper, a novel method is proposed. Firstly, since the combination of YCbCr and HSV color model has a good segmentation power on skin color, we used this scheme to avoid the interference of background in the original images. Then, we use Hough transform to locate the eyeballs which are close to the circular after the face...
Fusion of SAR image and multi-spectral (MS) image can provide complementary information about the ground observed objects. This paper presents an fusion method of SAR and multi-spectral images based on the IHS transformation and phase congruence feature extraction. The IHS transform is firstly made to MS image to separate the intensity from the hue and saturation components. Then the phase congruence...
The quality of peanut kernels is referred to the every aspect of the profit of supply and marketing. A BP neural network model of quality grade testing and identification is built which is based on 52 appearance features such as the form, texture, and color and so on with technology of computer image processing. The testing aiming at 1400 grains is made separately in unsound kernel, mildewing, impurity,...
Locating the lip in video sequences is one of the primary steps of the automatic lip reading system. Lip contour extraction was a useful technique for obtaining a mouth shape in an image, and was one of the most important techniques for human-machine interface applications in wheelchair system, such as lip reading and speech recognition. In this paper, a new method to extract lip contour from video...
Illumination estimation for color constancy is an important problem in computer vision. Existing algorithms can be divided into two groups: physics-based algorithms and statistics-based approaches. In this paper, the advantages of the two kinds are integrated. At first, a novel statistic-based algorithm called Illumination Estimation using K-nearest-neighbor (IE-KNN) is proposed. And then the physics-based...
ITU-R BT.1361 and IEC 61966-2-4(xvYCC) are two standards for video systems with extended-gamut YCC color space, the methods these two standards use to extend the color gamut are not the same. IEC 61966-2-4 put forward that the available quantization levels can be extended to [1, 254] in 8-bit quantization. This paper calculated the value range of luma and chroma signals corresponding to this available...
ITU-R BT.1361 defined the range of input signal for gamma correction was [-0.25, 1.33]. This paper calculated the widest color gamut and the corresponding three primary colors under this range for video system based on trichromatic principle using colorbar signal widely used in TV system, developed a kind of nonlinear quantization method to convey this gamut compatibly in current conventional color...
Remote sensing images are playing an increasing important role in the research of urban ecological environment, especially the extraction of the urban information. However, previous approaches towards processing the remotely sensed images required a lot of manual work. To try to promote the auto-processing of RS images, this paper proposed a novel approach based on the shape adaptive neighborhood...
ITU-R BT.1361 and IEC 61966-2-4(xvYCC) are two standards for video systems with extended-gamut YCC color space. IEC 61966-2-4 put forward that the available quantization levels can be extended to [1, 254] in 8-bit quantization. This paper calculated the value range of luma and chroma signals corresponding to this available quantization range with the colorbar signal which has been widely used in TV...
According to the different proportion of unknown and uncertain information to the entropy, the present measurements for vague set were divided into three groups. Tow new measurements were proposed according to the proportion as well. Finally A weighted measure of entropy for vague set was introduced. Several data and examples were used to test the measurements above, which demonstrates the different...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.