Preventing blur caused by motion of the subject in a digital image

A method of preventing image blur caused by motion of photographic subjects, comprising the steps of:

• forming an image on to an array of photosensors for a selected period of time;
• for each sensor during said selected period of time, monitoring at least one value proportional to the rate at which photons are striking the sensor and calculating a second derivative of the at least one value;
• for each sensor during said selected period of time, computing a second derivative of the at least one value, and comparing the second derivative with a criteria for determining motion;
• and
• for each sensor during said selected period of time, upon the condition that motion is detected, because the second derivative meets the criteria for determining motion, recording a second value corresponding to the percentage of the selected period of time which has elapsed, and recording the at least one value.

A method of preventing image blur caused by motion of photographic subjects, comprising the steps of:

• forming an image on to an array of photosensors for a selected period of time;
• for each sensor during said selected period of time, monitoring a photon collection rate for the sensor;
• for each sensor upon the condition that the photon collection rate varies more than a selected amount, recording a first value proportional to photons collected and recording a second value proportional to the percentage of the selected time which has elapsed;
• and
• for each sensor wherein the photon collection rate does not vary more than a selected amount recording a third value proportional to the photons collected during the entire selected period of time.