Image processing apparatus and operating method of the same

An image processing apparatus comprising:

• a memory storing one or more instructions;
• and
• a processor configured to execute the one or more instructions stored in the memory to:
• obtain first frequency coefficient information by converting a first image into a frequency domain in units of blocks having a preset size;
• obtain correlation information indicating a correlation between at least one block of the first frequency coefficient information and a first kernel;
• obtain first feature information by performing a convolution operation between the correlation information and a second kernel;
• generate a weight corresponding to the first frequency coefficient information based on the first feature information, wherein the weight indicates reliability of quality information indicated by the at least one block;
• generate second frequency coefficient information by rearranging coefficients included in the first frequency coefficient information, wherein one or more of the coefficients having a same frequency is arranged into a same group;
• and
• obtain quality information of the first image based on the weight and the second frequency coefficient information.