Method and apparatus for processing a histogram output from a detector sensor
AssigneesSTMicroelectronics (Grenoble 2) SAS, STMicroelectronics (Research & Development) Limited
InventorsJohn Kevin Moore, Sam Lee, Pascal Mellot, Donald Baxter, Stuart McLeod, Kenneth Dargan
Life of this patent
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Abstract
A method includes receiving a histogram output from a detector sensor, and calculating a median point of a pulse waveform within the histogram. The pulse waveform has an even probability distribution over at least one quantization step of the histogram around the median point. A corresponding apparatus can include a detector sensor and a co-processor coupled to the detector sensor.
Claims20
A method by which histogram distortion from pile-up can be compensated, the method comprising:
- sending a light signal to an object within a field-of-view of a detector sensor;
- receiving a reflected light pulse with the detector sensor;
- receiving a histogram from the detector sensor;
- determining a probability of readout saturation for the histogram;
- and
- compensating the histogram based on the determined probability.
An apparatus configured to compensate for histogram distortion, the apparatus comprising:
- a light source configured to send a light signal to the object;
- a sensor configured to:
- receive a reflected light signal from the object, and
- provide histogram data based on the reflected light signal;
- a probability determiner configured to determine a probability of readout saturation based on the histogram data;
- and
- a histogram compensator configured to compensate a histogram based on the determined probability.
A method by which histogram distortion from pile-up can be compensated, the method comprising:
- sending a light signal to an object within a field-of-view of a sensor;
- receiving a reflected light pulse with the sensor;
- receiving histogram data from the sensor comprising a plurality of histogram bin values;
- determining a filter, the filter having a filter length based on possibility of an event detection shadowing a later event detection within a sensor;
- determining a probability of readout saturation by applying the filter to the histogram data at each bin location;
- and
- compensating a histogram received from the sensor based on the determined probability.
Dependencies are inferred from the claim text.