Lastly , combining the advantages in algorithms of spatial domain and frequency domain , a new algorithm in combinational domain based on chaotic system is proposed 最后,结合空域和dct域二者算法的优点,论文给出了一种基于混沌的组合域数字水印算法。
The following problems have existed in digital audio watermarking and need studying further : there are less solutions of spatial domain algorithm of the digital audio watermarking 现有的数字音频水印中存在以下问题,需要进一步研究:数字音频水印时域算法的解决方案较少。
The first step , the infrared imageconverted from spatial domain to fuzzy field , then itenhanced by homomorphic filtering , at last , the processed image is obtained 该方案首先将红外图像由空域平面转换成模糊域(特征)平面,然后再对其进行同态增强,最终经去模糊得到处理后的图像。
In conventional r - d analysis , the bitrate r and distortion d are considered as function of quantization parameter q , which are usually developed in pixel - domain or spatial domain 在传统r - d模型中,码率r和失真d都看成量化步长的函数,而且失真评价函数一般在象素域或空域中进行。
In spatial domain , we propose two methods : one is based on the boundary of image which ca n ' t be easily detectable ; the other is based on the modules which holds a large capacity of hidden messages 2在图像空间域,提出了基于边界的人眼觉察性低的隐藏算法和基于模板的嵌入信息容量较大的隐藏算法。