首页> 外文会议>European Signal Processing Conference(EUSIPCO 2005); 20050904-08; Antalya(TK) >THE MEXICAN HAT WAVELET FAMILY. APPLICATION TO POINT SOURCE DETECTION IN COSMIC MICROWAVE BACKGROUND MAPS
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THE MEXICAN HAT WAVELET FAMILY. APPLICATION TO POINT SOURCE DETECTION IN COSMIC MICROWAVE BACKGROUND MAPS

机译:墨西哥小波家族。在宇宙微波背景图点源检测中的应用

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We propose a detection technique in 2D images based on an isotropic wavelet family. This family is naturally constructed as an extension of the Gaussian-Mexican Hat Wavelet pair and for that reason we call it the Mexican Hat Wavelet Family (MHWF). We show the performance of these wavelets for dealing with the detection of point extragalactic sources in cosmic microwave background (CMB) maps: a very important issue within the most general problem of the component separation of the microwave sky. In particular, simulations for one channel (44 GHz) of the forthcoming Planck mission have been analysed. We present the results and compare them with those obtained using the Mexican Hat Wavelet technique (MHW), which has been proven a suitable tool for detecting point sources. The MHWF provides a point source catalogue at 44 GHz of 690 sources. Under the same conditions, the MHW provides 604 sources.
机译:我们提出了一种基于各向同性小波族的二维图像检测技术。这个家族自然是作为高斯-墨西哥帽小波对的扩展而构建的,因此我们将其称为墨西哥帽小波家族(MHWF)。我们展示了这些小波在宇宙微波背景(CMB)图中处理点外银河源时的性能:这是最重要的微波天空成分分离问题中的一个非常重要的问题。特别是,已经对即将进行的Planck任务的一个通道(44 GHz)进行了仿真分析。我们介绍了结果,并将其与使用墨西哥帽小波技术(MHW)获得的结果进行了比较,该技术已被证明是检测点源的合适工具。 MHWF提供了44个690个源的点源目录。在相同条件下,MHW提供了604个源。

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