Signal processing method, acoustic wave processing apparatus, and recording medium
AssigneeCanon Kabushiki Kaisha
InventorNobuhito Suehira
Life of this patent
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Abstract
A signal processing method for a plurality of reception signals, wherein a plurality of reception elements are each configured to receive acoustic waves and output a reception signal at a plurality of sampling times, includes generating a representative value signal from the plurality of reception signals, except for reception signals having amplitudes that are larger than a threshold value among the plurality of reception signals at each sampling time, generating a plurality of differential signals indicating differences between the plurality of reception signals obtained at each sampling time and the representative value signal, and generating image data using the plurality of differential signals.
Claims20
A method for a processing apparatus having a signal processor configured to process a plurality of reception signals, wherein each of a plurality of reception elements is configured to receive acoustic waves and extract and output a data signal at each of a plurality of sampling times as part of a plurality of data signals obtained at a same time, the method comprising:
- generating one or more processed reception signals by removing, from among the plurality of data signals, a data signal having an amplitude that is larger than a threshold value, corresponding to each of the plurality of sampling times, wherein each removed data signal is part of the one or more processed reception signals;
- generating a representative value signal as a representative value of data signals in the plurality of data signals that are other than the one or more processed reception signals;
- generating a plurality of differential signals by calculating differences between the one or more processed reception signals and the representative value signal, corresponding to each of the plurality of sampling times;
- and
- generating image data for a display using the plurality of differential signals.
A non-transitory computer-readable storage medium storing a program to cause a computer to perform a method for a processing apparatus having a signal processor configured to process a plurality of reception signals, wherein each of a plurality of reception elements is configured to receive acoustic waves and extract and output a data signal at each of a plurality of sampling times as part of a plurality of data signals obtained at a same time, the method comprising:
- generating one or more processed reception signals by removing, from among the plurality of data signals, a data signal having an amplitude that is larger than a threshold value, corresponding to each of the plurality of sampling times, wherein each removed data signal is part of the one or more processed reception signals;
- generating a representative value signal as a representative value of data signals in the plurality of data signals that are other than the one or more processed reception signals;
- generating a plurality of differential signals by calculating differences between the one or more processed reception signals and the representative value signal, corresponding to each of the plurality of sampling times;
- and
- generating image data for a display using the plurality of differential signals.
A processing apparatus comprising:
- a signal processor configured to process a plurality of reception signals, wherein each of a plurality of reception elements is configured to receive acoustic waves and extract and output a data signal at each of a plurality of sampling times as part of a plurality of data signals obtained at a same time;
- and
- memory storing instructions that, when executed by the signal processor, cause the processing apparatus to perform operations including:
- generating one or more processed reception signals by removing, from among the plurality of data signals, a data signal having an amplitude that is larger than a threshold value, corresponding to each of the plurality of sampling times, wherein each removed data signal is part of the one or more processed reception signals,
- generating a representative value signal as a representative value of data signals in the plurality of data signals that are other than the one or more processed reception signals,
- generating a plurality of differential signals by calculating differences between the one or more processed reception signals and the representative value signal, corresponding to each of the plurality of sampling times, and
- generating image data for a display using the plurality of differential signals.
Dependencies are inferred from the claim text.