公开(公告)号：US3405237A

公开(公告)日：1968-10-08

申请号：US46010165

申请日：1965-06-01

Applicant: BELL TELEPHONE LABOR INC

Inventor： DAVID JR EDWARD E ,  SCHROEDER MANFRED R ,  SONDHI MAN M

IPC: G10L25/90

CPC classification number: G10L25/90

公开(公告)号：US3381091A

公开(公告)日：1968-04-30

申请号：US46010065

申请日：1965-06-01

Applicant: BELL TELEPHONE LABOR INC

Inventor： SONDHI MAN M

IPC: G10L25/90

CPC classification number: G10L25/90

公开(公告)号：US3499999A

公开(公告)日：1970-03-10

申请号：US3499999D

申请日：1966-10-31

Applicant: BELL TELEPHONE LABOR INC

Inventor： SONDHI MAN M

IPC: H04B3/23 ,  H04B3/20 ,  H04M9/08

CPC classification number: H04B3/23

公开(公告)号：US3679020A

公开(公告)日：1972-07-25

申请号：US3679020D

申请日：1969-04-02

Applicant: BELL TELEPHONE LABOR INC

Inventor： SONDHI MAN M

IPC: G01H3/12 ,  G03H3/00 ,  G01V1/00

CPC classification number: G01H3/125 ,  G03H3/00

Abstract: The shape of an object is reconstructed from measurements of the diffraction pattern observed in a monochromatic sound wave which irradiates the object. Both the amplitude and phase of sounds at a discrete set of points near the object (a rectangular lattice of suitable dimensions) are measured and used to evaluate the wavefront of the distorted sound wave. From these data, a visual display is constructed, e.g., on a facsimile receiver, cathode ray display, or the like.

Abstract translation: 通过在照射物体的单色声波中观察到的衍射图案的测量来重建物体的形状。 测量靠近物体的离散组点（适当尺寸的矩形网格）的声音的振幅和相位，并用于评估失真声波的波前。 根据这些数据，例如在传真接收机，阴极射线显示器等上构建视觉显示。

公开(公告)号：US3627920A

公开(公告)日：1971-12-14

申请号：US3627920D

申请日：1969-04-03

Applicant: BELL TELEPHONE LABOR INC

Inventor： SCHROEDER MANFRED R ,  SONDHI MAN M

IPC: H04N5/253 ,  H04N7/18

CPC classification number: H04N5/253

Abstract: Photographs which are blurred, for example, by uniform motion of a camera relative to an image during exposure, are restored by identifying certain parameters of the blurring, e.g., direction and displacement, using the parameters to transform the distortion into an additive periodic component in the picture (blur), and by estimating (or identifying) and subtracting the periodic components from the picture. Two-dimensional spectral analysis, or the cepstrum technique, may be employed to identify the blur parameters, and a transversal filter arrangement, adjusted in accordance with parameter values is used to perform the estimation and subtraction.