Digital image orientation marker

G - Physics – 01 – N

Patent

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Details

G01N 23/04 (2006.01) A61B 6/00 (2006.01) H04N 5/232 (2006.01) H04N 5/32 (2006.01)

Patent

CA 2390538

An orientation marker (16) for a digital radiogram (10) formed by a plurality of pixels arrayed along a plurality of rows and columns. The pixels have densities which represent the radiogram optical density at each pixel point, and the densities are represented by digital values. The marker is made by a number of marker pixels arrayed along at least one row and one column of the radiogram. Each of the pixels forming the marker (16), have a marker pixel digital value which has been selected to form an asymmetrical marker pixel pattern on the radiogram, replacing the original radiogram pixel values.

L'invention concerne un marqueur d'orientation (16) de radiogramme numérique (10) comportant une pluralité de pixels alignés selon plusieurs rangées et colonnes. Les pixels ont des densités qui représentent la densité optique du radiogramme à chaque point de pixel, et ces densités sont représentées par des valeurs numériques. Le marqueur est constitué d'un certain nombre de pixels de marqueur alignés le long d'au moins une rangée et une colonne du radiogramme. Chacun des pixels formant le marqueur (16) a une valeur numérique de pixel de marqueur choisie pour former une configuration de pixel de marqueur asymétrique sur le radiogramme, afin de remplacer les valeurs de pixel originales du radiogramme.

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