Image pickup apparatus having non-destructively readable image pickup means for picking up an object image
First Claim
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1. An image pickup apparatus comprising:
- image pickup means for picking up an object image, wherein the image pickup means is arranged to be non-destructively readable;
driving means for driving said image pickup means so that a first frame image picked up by said image pickup means is non-destructively read out from said image pickup means when a first time period elapses without reset of said image pickup means during the first time period after said image pickup means is reset, a second frame image picked up by said image pickup means is non-destructively read out from said image pickup means when a second time period elapses without reset of said image pickup means during the second time period after the first time period, and a third frame image picked up by said image pickup means is non-destructively read out from said image pickup means when a third time period elapses without reset of said image pickup means during the third time period after the second time period; and
subtraction means for effecting a subtraction process between said first and second frame images derived by non-destructive reading, and for effecting a subtraction process between said second and third frame images derived by non-destructive reading, and for outputting frame images resulting from the subtraction processes sequentially.
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Abstract
An image sensing apparatus including an X-ray image sensing unit having a non-destructive read function, adapted to sense an object image, and a subtractor adapted to sequentially output as a corrected value a difference between a plurality of frames sequentially read out non-destructively from the X-ray image sensing unit and a frame read out before the plurality of frames.
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Citations
9 Claims
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1. An image pickup apparatus comprising:
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image pickup means for picking up an object image, wherein the image pickup means is arranged to be non-destructively readable; driving means for driving said image pickup means so that a first frame image picked up by said image pickup means is non-destructively read out from said image pickup means when a first time period elapses without reset of said image pickup means during the first time period after said image pickup means is reset, a second frame image picked up by said image pickup means is non-destructively read out from said image pickup means when a second time period elapses without reset of said image pickup means during the second time period after the first time period, and a third frame image picked up by said image pickup means is non-destructively read out from said image pickup means when a third time period elapses without reset of said image pickup means during the third time period after the second time period; and subtraction means for effecting a subtraction process between said first and second frame images derived by non-destructive reading, and for effecting a subtraction process between said second and third frame images derived by non-destructive reading, and for outputting frame images resulting from the subtraction processes sequentially. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification