US 11,378,679 B2 · Sensor array imaging device

Abstract

A system produces sensed images. The system includes a sensor array, an image display device, and a processor that generates an image illustrating contents of an expanded field of view. The processor receives sensor element data from the sensor array, performs zero padding and discrete Fourier transform to result in a sensor wavenumber data buffer. The processor determines reference point locations, and generates a reference Fresnel field. The processor obtains an inverse Huygens-Fresnel transfer data buffer based on the reference Fresnel field. The processor multiplies each data element of the sensor wavenumber buffer with each corresponding data element of the inverse Huygens-Fresnel transfer data buffer. The processor generates a rectilinear spectrum data buffer based on the multiplication. The processor performs Stolt mapping and uniformly resampling to achieve image data.

Claims23

Dependent claims

A system for producing images of scene content within a sensed field of view comprising:

a sensor array of sensor elements configured to transmit a signal;
an image display device;
and
a processor configured to:
receive time-space sensor element data from the sensor array;
perform zero padding to modify the time-space sensor element data to a spatial size of a cross-range extent of the sensed field of view when the spatial size of a cross-range extent of the sensed field of view is larger than a spatial size of a cross-range extent of the sensor array;
store in a time-space sensor data buffer:
the zero-padded time-space sensor element data when the spatial size of the cross-range extent of the sensed field of view is larger than the spatial size of the cross-range extent of the sensor array;
and
the sensor element data when the spatial size of the cross-range extent of the sensed field of view is not larger than the spatial size of the cross-range extent of the sensor array;
and
generate image data representative of the scene contents within the sensed field of view from the processed sensor element data;
wherein the image data is configured for display on the image display device.

10 more elements

A system for producing images of one or more subscenes or full-scene content within a sensed field of view comprising:

a sensor array of sensor elements configured to transmit a signal;
an image display device;
and
a processor configured to:
generate one or more time-space domain reference signal data sets based on:
a first reference point location;
one or more second reference point locations;
a signal transmitted from the sensor array;
and
one or more sizes of one or more cross-range extents of the one or more subscenes or the full-scene of the sensed field of view;
perform one or more spatial discrete Fourier transforms (DFTs) on one or more data sets of reference Fresnel field data to form one or more frequency-wavenumber domain reference forward Huygens-Fresnel transfer data sets;
and
perform complex number conjugation of one or more of the frequency-wavenumber domain reference forward Huygens-Fresnel transfer data sets to form inverse Huygens-Fresnel transfer data sets for storage in one or more inverse Huygens-Fresnel transfer data buffers.

10 more elements

A system for producing images of scene content within a sensed field of view comprising:

a sensor array of sensor elements configured to transmit a signal;
an image display device;
and
a processor configured to:
receive sensor element data from the sensor array;
perform zero padding to modify the sensor element data to a size of the sensed field of view for storage in a sensor data buffer when the size of the sensed field of view is larger than a size of the sensor array;
store in the sensor data buffer:
the modified sensor element data when the size of the sensed field of view is larger than the size of the sensor array;
and
the sensor element data when the size of the sensed field of view is not larger than the size of the sensor array;
and
generate image data representative of the scene contents within the sensed field of view from the processed sensor element data;
wherein processing the sensor element data comprises performing wave field inversion of the sensor element data;
and
wherein the image data is configured for display on the image display device.

12 more elements

A system for producing images of scene content within a sensed field of view comprising:

a sensor array of sensor elements, the sensor elements having a predefined spacing and configured to transmit a predefined waveform;
an image display device;
and
a processor configured to:
determine a spatial reference point for the sensor array;
determine a spatial reference point for a field of view to be imaged;
generate reference Fresnel field sample data, based on the predefined waveform, to account for a space between the spatial reference point of the sensor array and the spatial reference point of the field of view to be imaged;
generate a data buffer containing the reference Fresnel field sample data;
wherein the reference Fresnel field sample data has reference Fresnel field data sample spacing that is proportional to, including equal to, the predefined spacing of the sensor elements;
and
wherein a total number of Fresnel field data samples of the reference Fresnel field sample data is identical to a total number of cross-range data samples of the field of view to be imaged;
determine a spatial discrete Fourier transform of the reference Fresnel field sample data to produce forward Huygens-Fresnel transfer data for a forward Huygens-Fresnel transfer buffer;
determine a complex conjugation of the forward Huygens-Fresnel transfer data to produce data for an inverse Huygens-Fresnel transfer buffer;
process the data of the inverse Huygens-Fresnel transfer buffer;
generate image data representative of the scene contents within the sensed field of view from the processed data of the inverse Huygens-Fresnel transfer buffer;
and
display the generated image data on the image display device.

14 more elements

Dependencies are inferred from the claim text.

Sensor array imaging device

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Sensor array imaging device

Life of this patent

Abstract

Claims23