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AssigneeTeledyne E2V Semiconductors SAS
InventorsPierre Fereyre, Philippe Moenne-Loccoz
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To eliminate image defects produced by high-energy particles passing through a time delay integration image sensor, upstream detection is effected on the digital values supplied by the pixels of the same rank that have successively observed the same scene point. This detection makes it possible to ignore or to correct values from corrupted pixels in establishing the digital signal representing the luminance of an observed scene point. Detection is based on the calculation of the difference between a first digital value pi,a(t1) and a second digital value pi,b(t2) supplied by two pixels Pxi,a and Pxi,b that have observed the same scene point, subtracting the second value from the first, and comparing it to a predetermined threshold k. If this difference is above the threshold, the first value is too high, the first value is ignored in the summation Σ′i effected to establish the luminance of the scene point, replacing this value with the second value to which it has been compared. Alternatively it is replaced by a mean value or excluded from the calculation.
A method for capturing one or more images of a scene with an active pixel time delay integration image sensor enabling the synchronized reading of the same scene strip successively by at least two lines of photosensitive pixels of the image sensor and pixel by pixel summation of the signals read by the various lines, wherein
An active pixel time delay integration image sensor including N lines of photosensitive pixels and enabling the synchronized reading of the same scene strip successively by at least two lines of photosensitive pixels and the pixel by pixel summation of the signals read by the various lines, the image sensor comprising a circuit for digitizing the signal supplied by each pixel and a digital processor circuit configured to perform digital addition of the digital values from the pixels of the same rank belonging to the various lines and having viewed the same scene point, a result of the addition supplied as output representing the light received by the image point, wherein the digital processor circuit is further configured to
Dependencies are inferred from the claim text.