Patent ID: 8649427
Filing Date: 2014-02-11
Classification: H04N

Abstract:
1. An image processor configured to perform actions comprising: receiving an image comprising image information; dividing the received image information into a plurality of areas, each of the plurality of areas having a predetermined size and a unique area identifier; taking area-specific samples of the received image information of the plurality of areas and calculating a reference value on the basis of the area-specific samples for each of the plurality of areas, the reference values corresponding only to a visual appearance of a corresponding area, the reference value being distinct from the unique area identifier; storing into a memory or transmitting a first reference value calculated for a first area, corresponding received image information for the first area and an area identifier of the first area; checking whether a second reference value corresponding to a second area is equivalent to the first reference value which has already been stored in the memory or transmitted; storing into the memory or transmitting the second reference value and the corresponding received image information for the second area, for which the reference value has been calculated, if on the basis of the check the reference value and the corresponding image information have not been stored into the memory or transmitted previously, and storing into the memory or transmitting the second reference value and not the corresponding received image information, for which the reference value has been calculated, if on the basis of the check the reference value and the corresponding image information are currently stored in the memory or have been transmitted previously in connection with the first area or another of the plurality of areas, wherein each of the reference vales comprises a weighted average of area-specific samples of pixels within a corresponding one of the plurality of areas divided by a surface area of the corresponding one of the plurality of areas, and wherein each of the reference values is expressed in pixels, wherein the surface area corresponds to a result of a horizontal number of the pixels in the corresponding one of the plurality of areas and a vertical number of the pixels in the corresponding one of the plurality of areas.