Process for the correction of distortions in radiological images
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United States of America Patent
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-
Aug 9, 1994
Grant Date -
N/A
app pub date -
Jan 13, 1992
filing date -
Jul 1, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process to correct distortion of radiological images by obtaining the image of a regular test chart and assessing the distortions to which the image is subjected. This assessment is used to correct normal images obtained with the installation. One obtains automatically the distortion corrections to be applied to the image elements by eliminating (55) the image background by creating (63) images of similar columns, by labelling (66) the columns detected and by calculating (71) the co-ordinates of the intersections of these columns. The calculation of the intersection co-ordinates is improved by replacing (89) these columns by straight segments whose position is calculated by a regression of least error squares over all the image elements belonging to this column and situated near this intersection. Preferably, all these calculations should be made through implementing mathematical morphology operations.
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