Image processing system having a sampled filter
First Claim
Patent Images
1. A display system comprising:
- an analog input image circuit generating an analog input image signal;
an analog to digital converter coupled to the analog input image circuit and generating digital input image signal samples in response to the analog input image signal, wherein the analog to digital converter includes a single bit circuit adapted to generate the digital input image signal samples as single bit digital input image signal samples in response to the analog input image signal;
an integrated circuit RAM coupled to the analog to digital converter and storing the single bit digital input image signal samples;
a RAM accessing circuit coupled to the integrated circuit RAM and accessing the single bit digital input image signal samples stored by the integrated circuit RAM;
an integrated circuit read only memory storing multiple bit digital reference signal samples;
a read only memory accessing circuit coupled to the integrated circuit read only memory and accessing the multiple bit digital reference signal samples stored by the integrated circuit read only memory;
a filter processor coupled to the RAM accessing circuit and coupled to the read only memory accessing circuit and generating multiple bit filtered digital image signal samples by filter processing the single bit digital input image signal samples accessed by the RAM accessing circuit in response to the multiple bit digital reference signal samples accessed by the read only memory accessing circuit;
a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the multiple bit filtered digital image signal samples; and
a display coupled to the digital to analog converter and displaying a filtered image in response to the analog output filtered image signal.
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Abstract
A filter display system is provided to improve display operations. Filtering of display information, such as with correlation filters, improves the image and enhances events of interest. High speed filters for filtering on the fly as the image is being refreshed provides improved capability for iteratively and adaptively enhancing an image. Parallel processing channels provide multiple filtering operations simultaneously for improved performance. Iteratively refreshing a display with filtered information as the filtered image is built up permits operator intervention for optimizing filtering operations.
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Citations
17 Claims
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1. A display system comprising:
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an analog input image circuit generating an analog input image signal; an analog to digital converter coupled to the analog input image circuit and generating digital input image signal samples in response to the analog input image signal, wherein the analog to digital converter includes a single bit circuit adapted to generate the digital input image signal samples as single bit digital input image signal samples in response to the analog input image signal; an integrated circuit RAM coupled to the analog to digital converter and storing the single bit digital input image signal samples; a RAM accessing circuit coupled to the integrated circuit RAM and accessing the single bit digital input image signal samples stored by the integrated circuit RAM; an integrated circuit read only memory storing multiple bit digital reference signal samples; a read only memory accessing circuit coupled to the integrated circuit read only memory and accessing the multiple bit digital reference signal samples stored by the integrated circuit read only memory; a filter processor coupled to the RAM accessing circuit and coupled to the read only memory accessing circuit and generating multiple bit filtered digital image signal samples by filter processing the single bit digital input image signal samples accessed by the RAM accessing circuit in response to the multiple bit digital reference signal samples accessed by the read only memory accessing circuit; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the multiple bit filtered digital image signal samples; and a display coupled to the digital to analog converter and displaying a filtered image in response to the analog output filtered image signal.
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2. A display system comprising:
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an analog input image circuit generating an analog input image signal; an analog to digital converter coupled to the analog input image circuit and generating digital input image signal samples in response to the analog input image signal, wherein the analog to digital converter includes a multiple bit circuit adapted to generate the digital input image signal samples as multiple bit digital input image signal samples in response to the analog input image signal; an integrated circuit RAM coupled to the analog to digital converter and storing the multiple bit digital input image signal samples; a RAM accessing circuit coupled to the integrated circuit RAM and accessing the multiple bit digital input image signal samples stored by the integrated circuit RAM; an integrated circuit read only memory storing single bit digital reference signal samples; a read only memory accessing circuit coupled to the integrated circuit read only memory and accessing the single bit digital reference signal samples stored by the integrated circuit read only memory; a filter processor coupled to the RAM accessing circuit and coupled to the read only memory accessing circuit and generating multiple bit filtered digital image signal samples by filter processing the multiple bit digital input image signal samples accessed by the RAM accessing circuit in response to the single bit digital reference signal samples accessed by the read only memory accessing circuit; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the multiple bit filtered digital image signal samples; and a display coupled to the digital to analog converter and displaying a filtered image in response to the analog output filtered image signal.
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3. A display system comprising:
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an analog input image circuit generating an analog input image signal; an analog to digital converter coupled to the analog input image circuit and generating digital input image signal samples in response to the analog input image signal, wherein the analog to digital converter includes a single bit circuit adapted to generate the digital input image signal samples as single bit digital input image signal samples in response to the analog input image signal; an integrated circuit RAM coupled to the analog to digital converter and storing the single bit digital input image signal samples; a RAM accessing circuit coupled to the integrated circuit RAM and accessing the single bit digital input image signal samples stored by the integrated circuit RAM; an integrated circuit read only memory storing single bit digital reference signal samples; a read only memory accessing circuit coupled to the integrated circuit read only memory and accessing the single bit digital reference signal samples stored by the integrated circuit read only memory; a filter processor coupled to the RAM accessing circuit and coupled to the read only memory accessing circuit and generating multiple bit filtered digital image signal samples by filter processing the single bit digital input image signal samples accessed by the RAM accessing circuit in response to the single bit digital reference signal samples accessed by the read only memory accessing circuit; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the multiple bit filtered digital image signal samples; and a display coupled to the digital to analog converter and displaying a filtered image in response to the analog output filtered image signal.
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4. A display system comprising:
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an analog input image circuit generating an analog input image signal; an analog to digital converter having a multiple bit circuit coupled to the analog input image circuit and generating multiple bit digital input image signal samples in response to the analog input image signal; an integrated circuit RAM coupled to the analog to digital converter and storing the multiple bit digital input image signal samples; a RAM accessing circuit coupled to the integrated circuit RAM and accessing the multiple bit digital input image signal samples stored by the integrated circuit RAM; an integrated circuit read only memory storing multiple bit digital reference signal samples; a read only memory accessing circuit coupled to the integrated circuit read only memory and accessing the multiple bit digital reference signal samples stored by the integrated circuit read only memory; a filter processor coupled to the RAM accessing circuit and coupled to the read only memory accessing circuit and generating multiple bit filtered digital image signal samples by filter processing the multiple bit digital input image signal samples accessed by the RAM accessing circuit in response to the multiple bit digital reference signal samples accessed by the read only memory accessing circuit; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the multiple bit filtered digital image signal samples; and a display coupled to the digital to analog converter and displaying a filtered image in response to the analog output filtered image signal.
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5. A display system comprising:
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an analog input image circuit generating an analog input image signal; an analog to digital converter coupled to the analog input image circuit and generating digital input image signal samples in response to the analog input image signal, wherein the analog to digital converter includes a multiple bit circuit adapted to generate the digital input image signal samples as multiple bit digital input image signal samples in response to the analog input image signal; an integrated circuit RAM coupled to the analog to digital converter and storing the multiple bit digital input image signal samples; a RAM accessing circuit coupled to the integrated circuit RAM and accessing the multiple bit digital input image signal samples stored by the integrated circuit RAM; an integrated circuit read only memory storing multiple bit digital reference signal samples; a read only memory accessing circuit coupled to the integrated circuit read only memory and accessing the multiple bit digital reference signal samples stored by the integrated circuit read only memory; a filter processor coupled to the RAM accessing circuit and coupled to the read only memory accessing circuit and generating multiple bit filtered digital image signal samples having a multiple bit digital resolution with more bits than the multiple bit digital input image signal samples and more bits than the multiple bit digital reference signal samples by filter processing the multiple bit digital input image signal samples accessed by the RAM accessing circuit in response to the multiple bit digital reference signal samples accessed by the read only memory accessing circuit; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the multiple bit filtered digital image signal samples; and a display coupled to the digital to analog converter and displaying a filtered image in response to the analog output filtered image signal.
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6. A display system comprising:
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an analog input image circuit having a transducer generating a transducer signal and a signal processing circuit coupled to the transducer and generating an analog input image signal in response to the transducer signal; an analog to digital converter coupled to the analog input image circuit and generating digital input image signal samples in response to the analog input image signal; an integrated circuit RAM coupled to the analog to digital converter and storing the digital input image signal samples; a RAM accessing circuit coupled to the integrated circuit RAM and accessing the digital input image signal samples stored by the integrated circuit RAM; an integrated circuit read only memory storing digital transducer reference signal samples; a read only memory accessing circuit coupled to the integrated circuit read only memory and accessing the digital transducer reference signal samples stored by the integrated circuit read only memory; a filter processor coupled to the RAM accessing circuit and coupled to the read only memory accessing circuit and generating filtered digital transducer image signal samples by filter processing the digital input image signal samples accessed by the RAM accessing circuit in response to the digital transducer reference signal samples accessed by the read only memory accessing circuit; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the filtered digital transducer image signal samples; and a display coupled to the digital to analog converter and displaying a filtered transducer image in response to the analog output filtered image signal.
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7. A display system comprising:
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an analog input image circuit having a plurality of analog input circuit channels, each one of the plurality of channels generating an analog input image signal; an analog to digital converter coupled to the analog input image circuit and generating a plurality of channels of digital input image signal samples in response to the plurality of channels of analog input image signal; an integrated circuit RAM coupled to the analog to digital converter and storing the plurality of channels of digital input image signal samples; a RAM accessing circuit coupled to the integrated circuit RAM and accessing a plurality of channels of digital input image signal samples stored by the integrated circuit RAM; an integrated circuit read only memory storing a plurality of channels of digital reference signal samples; a read only memory accessing circuit coupled to the integrated circuit read only memory and accessing the plurality of channels of digital reference signal samples stored by the integrated circuit read only memory; a plurality of channels of filter processors, each channel coupled to the RAM accessing circuit and coupled to the read only memory accessing circuit and generating filtered digital image signal samples by filter processing the digital input image signal samples accessed by the related channel of RAM accessing circuit in response to the digital reference signal samples accessed by the related channel of the read only memory accessing circuit; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the plurality of channels of filtered digital image signal samples; and a display coupled to the digital to analog converter and displaying the plurality of channels of filtered images in response to the analog output filtered image signal.
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8. A display system comprising:
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a synchronization circuit generating a synchronization signal; an analog input image circuit generating an analog input image signal; an analog to digital converter coupled to the analog input image circuit and generating digital input image signal samples in response to the analog input image signal; an integrated circuit RAM coupled to the analog to digital converter and storing the digital input image signal samples; a RAM accessing circuit coupled to the integrated circuit RAM and accessing the digital input image signal samples stored by the integrated circuit RAM; an integrated circuit read only memory storing digital reference signal samples and storing instructions; a read only memory accessing circuit coupled to the integrated circuit read only memory and accessing the digital reference signal samples and the stored instructions stored by the integrated circuit read only memory; a programmable filter processor coupled to the RAM accessing circuit, to the read only memory accessing circuit, to the read only memory accessing circuit, and to the synchronization circuit and generating filtered digital image signal samples in synchronization with the synchronization signal by filter processing the digital input image signal samples accessed by the RAM accessing circuit in response to the digital reference signal samples accessed by the read only memory accessing circuit, in response to the stored instructions accessed by the read only memory accessing circuit, and in response to the synchronization signal; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the filtered digital image signal samples; and a display coupled to the digital to analog converter and to the synchronization circuit and displaying a filtered image in response to the analog output filtered image signal and in synchronization with the synchronization signal.
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9. A display system comprising:
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an analog input image circuit generating an analog input image signal; an analog to digital converter coupled to the analog input circuit and generating digital input image signal samples in response to the analog input image signal, wherein the analog to digital converter includes a single bit circuit generating the digital input image signal samples as single bit digital input image signal samples in response to the analog input image signal; an integrated circuit memory coupled to the analog to digital converter and storing the digital input image signal samples; a filter processor coupled to the integrated circuit memory and generating filtered digital image signal samples by filter processing the digital input image signal samples stored by the integrated circuit memory; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the filtered digital image signal samples; and a display coupled to the digital to analog converter and displaying a filtered image in response to the analog output filtered image signal.
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10. A display system comprising:
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an analog input image circuit generating an analog input image signal; an analog to digital converter coupled to the analog input circuit and generating single bit digital input image signal samples in response to the analog input image signal; an integrated circuit memory coupled to the analog to digital converter and storing the single bit digital input image signal samples; a filter processor coupled to the integrated circuit memory and generating multiple bit filtered digital image signal samples by filter processing the single bit digital input image signal samples stored by the integrated circuit memory; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the multiple bit filtered digital image signal samples; and a display coupled to the digital to analog converter and displaying a filtered image in response to the analog output filtered image signal.
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11. A display system comprising:
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an analog input image circuit generating an analog input image signal; a reference signal memory storing single bit reference signal samples; an analog to digital converter coupled to the analog input circuit and generating multiple bit digital input image signal samples in response to the analog input image signal; an integrated circuit memory coupled to the analog to digital converter and storing the multiple bit digital input image signal samples; a filter processor coupled to the integrated circuit memory and to the reference signal memory and generating multiple bit filtered digital image signal samples by filter processing the multiple bit digital input image signal samples stored by the integrated circuit memory in response to the single bit reference signal samples; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the multiple bit filtered digital image signal samples; and a display coupled to the digital to analog converter and displaying a filtered image in response to the analog output filtered image signal.
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12. A display system comprising:
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an analog input image circuit generating an analog input image signal; a reference signal memory storing single bit reference signal samples; an analog to digital converter coupled to the analog input circuit and generating single bit digital input image signal samples in response to the analog input image signal; an integrated circuit memory coupled to the analog to digital converter and storing the single bit digital input image signal samples; a filter processor coupled to the integrated circuit memory and coupled to the reference signal memory and generating multiple bit filtered digital image signal samples by filter processing the single bit digital input image signal samples stored by the integrated circuit memory in response to the single bit reference signal samples; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the multiple bit filtered digital image signal samples; and a display coupled to the digital to analog converter and displaying a filtered image in response to the analog output filtered image signal.
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13. A display system comprising:
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an analog input image circuit generating an analog input image signal; a reference signal memory storing multiple bit reference signal samples; an analog to digital converter coupled to the analog input image circuit and generating multiple bit digital input image signal samples in response to the analog input image signal; an integrated circuit memory coupled to the analog to digital converter and storing the multiple bit digital input image signal samples; a filter processor coupled to the reference signal memory and to the integrated circuit memory and generating multiple bit filtered digital image signal samples by filter processing the multiple bit digital input image signal samples stored by the integrated circuit memory in response to the multiple bit reference signal samples; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the multiple bit filtered digital image signal samples; and a display coupled to the digital to analog converter and displaying a filtered image in response to the analog output filtered image signal.
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14. A display system comprising:
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an analog input image circuit generating an analog input image signal; an analog to digital converter coupled to the analog input circuit and generating multiple bit digital input image signal samples in response to the analog input image signal; an integrated circuit memory coupled to the analog to digital converter and storing the multiple bit digital input image signal samples; a filter processor coupled to the integrated circuit memory and generating multiple bit filtered digital image signal samples having more resolution than the digital input image signal samples by filter processing the multiple bit digital input image signal samples stored by the integrated circuit memory; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the multiple bit filtered digital image signal samples; and a display coupled to the digital to analog converter and displaying a filtered image in response to the analog output filtered image signal.
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15. A display system comprising:
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an analog input image circuit having a transducer generating a transducer signal and a signal processing circuit coupled to the transducer and generating an analog input image signal in response to the transducer signal; an analog to digital converter coupled to the analog input circuit and generating digital input image signal samples in response to the analog input image signal; an integrated circuit memory coupled to the analog to digital converter and storing the digital input image signal samples; a filter processor coupled to the integrated circuit memory and generating filtered digital transducer image signal samples by filter processing the digital input image signal samples shared by the integrated circuit memory; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the filtered digital transducer image signal samples; and a display coupled to the digital to analog converter and displaying a filtered transducer image in response to the analog output filtered image signal.
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16. A display system comprising:
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an analog input image circuit having a plurality of channels of the analog input circuit, each one of the plurality of channels generating an analog input image signal; an analog to digital converter coupled to the analog input circuit and generating a plurality of channels of digital input image signal samples in response to the plurality of channels of analog input image signals; an integrated circuit memory coupled to the analog to digital converter and storing the plurality of channels of digital input image signal samples; a plurality of channels of filter processors, each channel coupled to the integrated circuit memory and generating filtered digital image signal samples by filter processing the related channel of the digital input image signal samples stored by the integrated circuit memory; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the plurality of channels of filtered digital image signal samples; and a display coupled to the digital to analog converter and displaying the plurality of channels of filtered images in response to the analog output filtered image signal.
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17. A display system comprising:
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a synchronization circuit generating a synchronization signal; an analog input image circuit generating an analog input image signal; an analog to digital converter coupled to the analog input circuit and generating digital input image signal samples in response to the analog input image signal; an integrated circuit memory coupled to the analog to digital converter and storing the digital input image signal samples; an integrated circuit read only memory storing instructions; a read only memory accessing circuit coupled to the integrated circuit read only memory and accessing the stored instructions; a programmable filter processor coupled to the read only memory accessing circuit, to the integrated circuit memory, and to the synchronization circuit and generating the filtered digital image signal samples in synchronization with the synchronization signal by filter processing the digital input image signal samples stored by the integrated circuit memory in response to the stored instructions accessed by the read only memory accessing circuit and in response to the synchronization signal; a digital to analog converter coupled to the filter processor and generating an analog output filtered image signal in response to the filtered digital image signal samples; and a display coupled to the digital to analog converter and to the synchronization circuit and displaying a filtered image in response to the analog output filtered image signal and in synchronization with the synchronization signal.
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Specification