We present a texture descriptor for multimedia contents description in MPEG-7. The current MPEG-7 candidate for the texture descriptor has been designed to be suitable for the numan visual system (HVS). In this paper, the testure is described using perceptual channels that are bands in spatial...
提出一种基于人类视觉特性和小波包分解的数字水印算法。 www.dictall.com 10. A nature scene image color-texture feature extraction method based on human visual system(HVS) was proposed. 提出了基于人类视觉系统的自然场景图像颜色和纹理特征提取方法。 www.dictall.com 1 2 3 4 5©...
In this paper, a texture segmentation algorithm based on the HVS mechanism was presented. It can give the number of texture type and approximate areas in the image mimicking the preattentive stage, and can also give the Gabor filters parameters mimicking the focused attention stage. This algorithm...
A model for the human visual system (HVS) is an important component of many halftoning algorithms. Using the iterative direct binary search (DBS) algorithm, we compare the halftone texture quality provided by four different HVS models that have been reported in the literature. Choosing one HVS ...
This paper concentrates on the spatial domain image digital watermarking payload, based on the constraint of perceptual invisibility research the influence under the factors in Human Visual System (HVS), such as brightness masking factor, contrast masking factor and texture masking factor, with such as...
texture sensitivityrobustnessMost existing visible watermarking techniques only considering the host image characteristics and the visible watermark has low contrast. To achieve optimal balance between the visual quality and the visible watermark contrast, an image adaptive visible watermarking scheme in ...
Hence, the following improved CSF function is used in this paper: (14) where denotes the peak frequency, denotes the contrast sensitivity, and f denotes the spatial frequency in cycles per degree. (4) Position Sensitivity Many HVS-related research experiments have indicated that people usually ...
(HVS) is proposed,which is validated by the experiment.The method uses CCD image sensor to get LED images.The image is divided into equal regions and each region's luminance characteristic factor,texture detail characteristic factor,and spatial location characteristic factor are calculated.Afterwards,...
texture complexity areaforhuman eye.And thethresholdis normalizedthroughadding an expansionfactor SO that thevalueis less than1after normalized.Grayscale watermark image iSscrambled弱Arnoldmethod.Thenthewatermark image afterscramblediatransfonnedintowaveletdomain.Toensurethe ...
TextureDetectionThis paper presents a spatial noise reduction technique designed to work on CFA (Color Filtering Array) data acquired by CCD/CMOS image sensors. The overall processing preserves image details using some heuristics related to the HVS (Human Visual System); estimates of local texture ...