摘要:
The invention provides for phase measurement in transmission and reflection scanning optical microscopes. In these microscopes a parallel beam of laser (1) light is focused onto a small portion of an object (4). Light from this small portion is imaged via a pinhole (8) onto a single detector (10). The image is built up by scanning the object and recording the output from the detector for each object position. In this invention the phase image is recovered by subsequent processing of two or more amplitude images. One image is measured in the usual way; the other or others are recorded with suitable filters (2, 7) placed in the Fourier or output planes of both the illumination (3) and imaging (6) lenses. The two optical filters (2, 7) have amplitude weighting functions g(x, y) which preferably equal c. exp(ax + by), where a, b and c ar real constants.
摘要:
The present invention provides for speech processing apparatus arranged for the input or output of a speech data signal and including a function generating means arranged for producing a representation of a vocal-tract potential function representative of a speech source and as an example, a speaker identification process can comprise means to capture an incoming voice signal, for example from a microphone or telephone line; means to process the signal electronically to generate a time varying series of binary parameters; means to refine the signal to revoke the speaker-independent speech components; and means to compare the residual signal with a database of such residual features of known individuals.
摘要:
The invention improves the resolution in a scanning confocal microscope by performing optical signal processing prior to detection. Such processing is achieved by an element (7, 39, 42) having either or both phase and amplitude weighting. The microscope may be a transmission, reflection, or fluorescent microscope. In a transmission microscope a laser (1) illuminates a small area of a sample (3). Light from this small area is focussed onto an optical processing element (7). Output from the element (7) is detected by a detector (11) via a pin hole (9) in a stop plate (10). Phase weighting of the element (7) may be formed by a rectangular grating (15), and amplitude weighting formed by a sinusoidal variation in absorption. One optical weighting function m(x, y) is cos (2 pi Nx/ lambda ).cos(2 pi Ny/ lambda ), where N is the numerical aperture of lenses (2, 6) and lambda is wavelength. An alternative optical weighting function m(x, y) is sign (cos(2 pi Nx/ lambda )).sign (cos(2 pi Ny/ lambda )).
摘要翻译:本发明通过在检测之前执行光信号处理来提高扫描共聚焦显微镜中的分辨率。 这种处理通过具有相位和幅度加权之一或两者的元件(7,39,42)实现。 显微镜可以是透射,反射或荧光显微镜。 在透射显微镜中,激光(1)照射样品(3)的小面积。 来自该小区域的光聚焦到光学处理元件(7)上。 来自元件(7)的输出由检测器(11)经止动板(10)中的销孔(9)检测。 元件(7)的相位加权可以由矩形光栅(15)形成,并且通过吸收的正弦变化形成振幅加权。 一个光学加权函数m(x,y)是cos(2πNx /λ).cos(2 pi Ny / lambda),其中N是透镜(2,6)的数值孔径,λ是波长。 另一个光学加权函数m(x,y)是符号(cos(2 pi Nx / lambda))。sign(cos(2 pi Ny / lambda))。
摘要:
An acoustic modeling process employed as part of a speech recognition procedure, and including extracting linguistic feature vectors from an incoming acoustic wave for use in identification algorithms, the said extracting comprising inverse mapping from the acoustic wave by way of a potential function plus consonantal features and the said speech recognition comprising a procedure based on spectral features and a binary voicing feature.
摘要:
A method of deblurring images e.g. from an MRI scan, comprises calculating the distribution of the slope value of the intensities between the pixels in the image, and using a Levy distribution of power factor k of 1 (Cauchy distribution) up to but not inc luding (2) to determine the correction term to be applied.
摘要:
The present invention provides for speech processing apparatus arranged for the input or output of a speech data signal and including a function generating means arranged for producing a representation of a vocal-tract potential function representative of a speech source and as an example, a speaker identification process can comprise means to capture an incoming voice signal, for example from a microphone or telephone line; means to process the signal electronically to generate a time varying series of binary vocal-tract potentials and associated non-vowel binary parameters; means to refine the signal to revoke the speaker-independent speech components; and means to compare the residual signal with a database of such residual features of known individuals.