Image processing device and blurred image generation method

An image processing method comprising:

• extracting a background area of an image based on pixel data received from an external device;
• generating a low-resolution sub-image in which a downscaling operation is performed on the background area;
• performing a blur operation on the low-resolution sub-image;
• upscaling an intermediate image on which the blur operation is performed to original resolution;
• and
• compositing the upscaled intermediate image and a foreground area of the image.

An image processing system comprising:

• an image sensor configured to generate pixel data including brightness information and depth information;
• and
• an image processing device configured to generate a blurred image in which a background area of an image is blurred based on the pixel data,
• wherein the image processing device comprises:
• a pre-processor configured to extract the background area of the image based on the depth information and generate a low-resolution sub-image for the background area based on an intensity of a blur operation;
• a background blur component configured to generate an intermediate image in which the blur operation is performed on the low-resolution sub-image and increase resolution of the intermediate image;
• and
• an image compositer configured to composite the intermediate image of which resolution is increased to a foreground area of the image.