X-ray onset detector for intraoral dental sensor

A computer program product including one or more non-transitory machine-readable mediums encoded with instructions that when executed by one or more processors cause a process to be carried out for intraoral x-ray detection, the process comprising:

• calculating a plurality of superpixel values, each of the superpixel values based on a sum of pixel values of a set of pixels associated with the superpixel value, the set of pixels selected from a detection row of a current frame of a sensor, wherein selecting the set of pixels associated with each of the plurality of superpixel values as a set of the pixels of the detection row that are interleaved with pixels associated with another of the plurality of superpixels values;
• calculating a difference between each of the plurality of superpixel values and a corresponding stored superpixel value generated from a previous frame of the sensor;
• determining if the differences exceed a superpixel threshold value;
• incrementing a hit counter in response to the determination;
• and
• generating a detection signal in response to a determination that the hit counter exceeds a hit count threshold.

A method for intraoral x-ray detection, the method comprising:

• calculating, by a processor-based system, a plurality of superpixel values, each of the superpixel values based on a sum of pixel values of a set of pixels associated with the superpixel value, the set of pixels selected from a detection row of a current frame of a sensor;
• selecting the set of pixels associated with each of the plurality of superpixel values as a set of the pixels of the detection row that are interleaved with pixels associated with another of the plurality of superpixels values;
• calculating, by the processor-based system, a difference between each of the plurality of superpixel values and a corresponding stored superpixel value generated from a previous frame of the sensor;
• determining, by the processor-based system, if the differences exceed a superpixel threshold value;
• incrementing, by the processor-based system, a hit counter in response to the determination;
• and
• generating, by the processor-based system, a detection signal in response to a determination that the hit counter exceeds a hit count threshold.