Image sensor and operating method thereof

An image sensor, comprising:

• a pixel array in which a plurality of pixel groups are arranged, each of the pixel groups including color pixels and white pixels sharing a floating diffusion node;
• a readout circuit configured to receive, from each of the plurality of pixel groups, during a single frame period, a reset signal, a first image signal including a sensing signal of the color pixels, and a second image signal including sensing signals of the color pixels and the white pixels, and output color pixel values corresponding to the color pixels and white pixel values corresponding to the white pixels based on the received reset signal, first image signal, and second image signal;
• and
• an image signal processor configured to generate output image data based on the color pixel values and the white pixel values.

An operating method of an image sensor, the operating method comprising:

• reading out, from each of a plurality of binning areas of a pixel array, a plurality of pixel signals including a sensing signal of color pixels and a sensing signal of white pixels in a single frame period;
• generating first image data including color pixel values based on the plurality of pixel signals;
• generating second image data including white pixel values based on the plurality of pixel signals;
• and
• generating output image data by merging the first image data with the second image data.