Divergence in sequence through evolution precludes sequence alignment based homology methodologies for protein folding prediction from detecting structural and folding similarities for distantly related protein. Homolog coverage of actual data bases is also a factor playing a critical role in the performance of those methodologies, the factor being conspicuously apparent in what is called the t...

Remote sensing systems designed to monitor the surface environment employ a multispectral design such as parallel sensor arrays thereby detecting radiation in a small number of broad wavelength bands in order to provide increased spectral discrimination. These broad-band multispectral systems allow discrimination of different types of vegetation, rocks and soils, clear and turbid water, and som...

The automatic extraction of the notes that were played in a digital musical signal (automatic music transcription) is an open problem. A number of techniques have been applied to solve it without concluding results. This work tries to pose it through the identification of the spectral pattern of a given instrument in the signal spectrogram using time-delay neural networks. We will work in the m...

Humans easily recognize "transposed" musical melodies shifted up or down in log frequency. Surprisingly, songbirds seem to lack this capacity, although they can learn to recognize human melodies and use complex acoustic sequences for communication. Decades of research have led to the widespread belief that songbirds, unlike humans, are strongly biased to use absolute pitch (AP) in melody recogn...

コンピュータビジョンにおいて画像の中から特定の パターンを探し出すパターンマッチングは基本的な処 理である.パターンマッチングには,2枚の画像の相関 値に基づく相関テンプレートマッチングや,画像の代 表的な特徴点同士を照合する特徴点マッチング [1], [2] が知られる. 相関テンプレートマッチングにおいては,対象物の 回転やスケール変化等に対応するために,姿勢の異な る複数のテンプレート画像を何度も照合を行う.一方 で,顔認証などでは多数のテンプレート画像を主成分 分析により圧縮して照合を行う固有顔法や,同様の考 えに基づく固有空間法が知られている [3]~[6].また, 近年では多数の画像を有限区間の直交多項式で近似す る方法も提案されている [7].このように多数枚の画像 を圧縮・近似して,テンプレートマッチングへ応用す ることは常套手段となっている. 一方で,SIFT (S...

Classification of multichannel electroencephalogram (EEG) recordings during motor imagination has been exploited successfully for brain-computer interfaces (BCI). Frequency bands and channels configuration that relate to brain activities associated with BCI tasks are often pre-decided as default in EEG analysis without deliberations. However, a steady configuration usually loses effects due to ...

The adaptive and automated analysis of spectral data plays an important role in many areas of research such as physics, astronomy and geophysics, chemistry, bioinformatics, biochemistry, engineering, and others. The amount of data may range from several billion samples in geophysics to only a few in medical applications. Further, a vectorial representation of spectra typically leads to huge-dim...

Change is recognized as being intrinsic to ecosystems, but is also the essence of instability and the outgrowth of situations that lack sustainability. Change is arguably the most fundamental symptom for onset of abnormality in ecosystem function, and change in change cannot be detected without sufficient monitoring to determine spatial and temporal aspects of characteristic change regimes acro...

We propose a new method of color-pattern recognition by optical correlation that uses a linear description of spectral reflectance functions and the spectral power distribution of illuminants that contains few parameters. We report on a method of preprocessing color input scenes in which the spectral functions are derived from linear models based on principal-component analysis. This multichann...