Patent ID: 8520892

Claim:
A method for detecting an object on an image representable by picture elements (pixels), comprising: determining first and second adaptive thresholds for picture elements of the image, wherein the first and second adaptive thresholds depend on an average intensity in a region around the respective picture element, wherein the first adaptive threshold further depends on a first contrast factor, and wherein the second adaptive threshold further depends on a second contrast factor differing from the first contrast factor; determining partial objects of picture elements of a first type, wherein the picture elements of the first type are acquired based on a comparison with the first adaptive threshold; determining picture elements of a second type, wherein the picture elements of the second type are acquired based on a comparison with the second adaptive threshold; combining a first and a second one of the partial objects to an extended partial object by picture elements of the second type, wherein the object to be detected can be described by a sum of the partial objects of picture elements of the first type and/or the sum of the acquired extended partial objects.