Image processor and image processing system including the same

An operating method of an image processor including a high dynamic range (HDR) synthesis circuit, the method comprising:

• obtaining a plurality of images corresponding to a plurality of exposure times;
• synthesizing a first HDR image, based on a first image and a second image having different exposure times among the plurality of images;
• and
• applying a first weight including weight values respectively corresponding to pixels of the first HDR image to the first HDR image, and applying a second weight including weight values respectively corresponding to pixels of a third image to the third image to synthesize the second HDR image,
• the plurality of images including the third image,
• an exposure time corresponding to the third image being shorter than an exposure time corresponding to the first image and an exposure time corresponding to the second image.

An image processing system comprising:

• an image sensor configured to generate a plurality of images corresponding to a plurality of exposure times;
• and
• a processor configured to
• receive the plurality of images from the image sensor,
• synthesize a first high dynamic range (HDR) image, based on the plurality of images,
• synthesize a second HDR image, based on the first HDR image and any one of the plurality of images,
• apply a first weight including weight values respectively corresponding to pixels of the first HDR image to the first HDR image, and
• apply a second weight including weight values respectively corresponding to pixels of the any one of the plurality of images to the any one of the plurality of images to synthesize the second HDR image.