Method and arrangement for touchless detection of data of uneven surfaces

A method for detecting data of an uneven surface of an object, the method comprising:

• illuminating at least one of stripes and a grid on the uneven surface using at least one light source;
• detecting, without a touching contact, light reflected from the uneven surface at a plurality of discrete locations so as to create a partial image of the uneven surface at each of the plurality of discrete locations;
• selectively analyzing each of the partial images;
• and
• combining at least portions of the partial images into an overall image of the uneven surface, wherein the at least one light source includes a plurality of light sources disposed around the object in an arc-shaped configuration, wherein the illuminating includes sequentially switching on each of the plurality of light sources, and wherein the detecting is performed sequentially according to the switching.

A method for detecting data of an uneven surface of an object, the method comprising:

• illuminating at least one of stripes and a grid on the uneven surface using at least one light source;
• detecting, without a touching contact, light reflected from the uneven surface at a plurality of discrete locations so as to create a partial image of the uneven surface at each of the plurality of discrete locations;
• selectively analyzing each of the partial images;
• and
• combining at least portions of the partial images into an overalls image of the uneven surface, wherein the selectively analyzing is performed using different wavelengths, wherein the illuminating includes directionally illuminating with white light, wherein the detecting is performed by a camera, wherein color filtering single areas is performed during the detecting so as to create partial images of different wavelengths, wherein the analyzing includes selecting an area and assigning a desired location to the area, and wherein the combining includes combining at least portions of the partial image into an overall black and white image in a frame buffer.

A method for detecting data of an uneven surface of an object, the method comprising:

• illuminating at least one of stripes and a grid on the uneven surface using at least one light source;
• detecting, without a touching contact, light reflected from the uneven surface at a plurality of discrete locations so as to create a partial image of the uneven surface at each of the plurality of discrete locations;
• selectively analyzing each of the partial images;
• and
• combining at least portions of the partial images into an overall image of the uneven surface, wherein the selectively analyzing is performed using different wavelengths wherein the at least one light source includes a plurality of light sources synchronously switched on during the detecting, and wherein the detecting includes only one camera so as to create each of the partial images for each light source, and further comprising selecting an area for each of the partial images for each lighting situation using an electronic control unit.

A method for detecting data of an uneven surface of an object, the method comprising:

• illuminating at least one of stripes and a grid on the uneven surface using at least one light source;
• detecting, without a touching contact, light reflected from the uneven surface at a plurality of discrete locations so as to create a partial image of the uneven surface at each of the plurality of discrete locations;
• selectively analyzing each of the partial images;
• and
• combining at least portions of the partial images into an overall image of the uneven surface, wherein the object includes a finger, and wherein the detecting includes scanning the finger line by line selectively, wherein the lines are aligned parallel to an axis of the finger.