Patent ID: 11893712
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A control method of an electronic device, comprising:
converting an input image to a first frequency domain signal;
obtaining, based on first energy information for each of a plurality of first pixel blocks included in the input image in the first frequency domain signal, first information indicating whether each of the plurality of first pixel blocks is a texture block;
obtaining first ratio information of the texture block among the plurality of first pixel blocks based on the first information;
performing noise removal processing on the input image;
converting the noise-removed image to a second frequency domain signal;
obtaining, based on second energy information for each of a plurality of second pixel blocks included in the noise-removed image in the second frequency domain signal, second information indicating whether each of the plurality of second pixel blocks is the texture block;
obtaining second ratio information of the texture block among the plurality of second pixel blocks based on the second information;
obtaining energy amount corresponding to each of the plurality of second pixel blocks by summing up energy amount of frequency bands having a value equal to or more than a first threshold value in the second frequency domain signal;
obtaining third information on maximum energy amount among energy amount of each of the plurality of second pixel blocks; and
identifying whether the input image is an upscaled image based on a difference between the first ratio information and second ratio information, the second ratio information and the third information.