Image Processing Apparatus, an Imaging System, a Computer Program and a Method for Enabling Scaling of an Object in an Image

摘要

The invention relates to an image processing apparatus arranged to scale an object within an image, said image processing apparatus comprising a calibrator arranged to scale the object based on a calibration factor derived from a relationship between a true dimension of a marker and a dimension of the marker in pixel units in the image, wherein the calibrator is further arranged to generate a plurality of calibration factors obtained using a plurality of differently oriented markers identified within said image. The image (I) comprises a plurality of objects (3, 8, 9) which are oriented differently in space resulting in a different alignment of these objects with respect to the anatomical structures (2). The object (3) is linked to a measurement tool, which is arranged to measure a length of the object (3) in pixel units and to calculate a true length of the object (3) using a calibration factor determined from a marker (A), which has a similar alignment in space as the object (3). The image (I) further comprises objects (8, 9), linked to a measurement tool, which is arranged to calculate a true length of the objects (8, 9) based on respective lengths of these object in pixel units and a calibration factor determined using the marker (B). Preferably, the objects corresponding to a different marker are grouped to form a calibration group, whereby an update in the calibration factor results in an automatic update of true dimensions for all objects within the same calibration group. Preferably, each calibration group is identified differently for user's convenience. The invention further relates to an imaging system, a computer program and a method for enabling scaling of objects in the image.