Patent ID: 8090144
Filing Date: 2012-01-03
Classification: H04N

Abstract:
1. A system for adjusting luminance of a light-emitting device on an image measuring machine, the system comprising: a reading module configured for reading a model definition curve chart of the light-emitting device, the model definition curve chart comprising a coordinate system containing a model definition curve, and model coordinates of an object and a charge coupled device (CCD) on the image measuring machine; a position determining module configured for determining positions of the object and the CCD on the image measuring machine according to the model coordinates of the object and the CCD, so as to locate the object and the CCD to positions on the image measuring machine; a driving module configured for driving the light-emitting device to emit light, and controlling the CCD to capture a digital image of the object of at each luminance value of the light-emitting device; a computing module configured for computing a definition value for each captured digital image and generating a new definition curve in the model definition curve chart according to the computed definition values; a deviation determining module configured for determining if an ordinate deviation corresponding to each abscissa value between the new definition curve and the model definition curve in the model definition curve chart falls in an allowable deviation range; an adjusting module configured for adjusting a resistance of the light-emitting device to ensure the ordinate deviation falls in the allowable deviation range; and at least one processor for executing the reading module, the position determining module, the driving module, the computing module, the deviation determining module and the adjusting module.