Apparatus and method for segmenting and classifying image data

G - Physics – 06 – T

Patent

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G06T 7/00 (2006.01) G06K 9/20 (2006.01)

Patent

CA 2205764

A method and apparatus for segmenting image data into windows and for classifying the windows as typical image types includes making two passes through the image data. The method includes a step of making a first pass through the image data to identify windows and to record the beginning points and image types of each of the windows, and a step of making a second pass through the image data to label each of the pixels as a particular image type. The invention also includes a macro-detection method and apparatus for separating a scanline of image data into edges and image runs and for classifying each of the edges and image runs as standard image types. In the macro-detection method, image runs and edges are classified based on micro-detection results and based on image types of adjacent image runs.

L'invention est constituée par une méthode et un appareil servant à segmenter des données d'imagerie en fenêtres et à classer ces fenêtres en types d'image. La méthode de l'invention nécessite deux passages dans les données d'imagerie. Le premier passage sert à reconnaître les fenêtres et à enregistrer les points de début et les types d'image de chacune des fenêtres; le second passage sert à affecter à chacun des pixels une étiquette indiquant à quel type d'image il appartient. L'invention comprend également une méthode et un dispositif de macrodétection servant à séparer les lignes de balayage des données d'imagerie en bords et en corps d'image et à classer chacun des bords et chacun des corps d'image selon les types d'image standard. Dans cette méthode de macrodétection, les corps d'image et les bords sont classés d'après les résultats d'une microdétection et ce classement est basé sur les types d'image de corps d'image adjacents.

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