Display apparatus and image processing method thereof

An image processing apparatus, comprising:

• a memory configured to store at least one instruction;
• and
• a processor electrically connected to the memory,
• wherein the processor, by executing the at least one instruction, is configured to:
• apply an input image to a training network model, and
• obtain a texture patch outputted from the training network model to correspond to a pixel block included in the input image,
• apply the texture patch to the pixel block to obtain an output image,
• wherein the training network model stores a plurality of texture patches corresponding to a plurality of classes classified based on a characteristic of a pixel block, identifies a class among the plurality of classes, based on a characteristic of the pixel block included in the input image, outputs the texture patch corresponding to the identified class, and updates at least one texture patch, among the plurality of texture patches, based on the input image.