an image sensor which generates image data; and

an image processor which processes the image data,

wherein the image sensor comprises:

a pixel array comprising a plurality of pixels repeatedly disposed along a row direction and a column direction,

wherein the plurality of pixels comprises every pixel disposed along the row direction and the column direction,

wherein each of pixels from among the pixels belonging to a first row of a plurality of rows of the pixel array comprises a plurality of sub-pixels, the sub-pixels within a same one of the pixels belonging to the first row are disposed along the row direction relative to each other, and each sub-pixel within the same one of the pixels belonging to the first row is connected to a different one of a first transmission metal line, a second transmission metal line, and a third transmission metal line,

wherein, in response to signals respectively applied to the first to third transmission metal lines, at least a part of charges integrated at the sub-pixels of the pixels belonging to the first row is diffused to corresponding floating diffusion areas,

wherein each of pixels from among the pixels belonging to a second row of the rows of the pixel array comprises a plurality of sub-pixels, the sub-pixels within a same one of the pixels belonging to the second row are disposed along the row direction relative to each other, and each sub-pixel within the same one of the pixels belonging to the second row is connected to a different one of a fourth transmission metal line, a fifth transmission metal line, and a sixth transmission metal line,

wherein a first pixel of the pixels belonging to the first row comprises a first sub-pixel connected to the third transmission metal line and a second sub-pixel connected to the second transmission metal line,

wherein a second pixel of the pixels belonging to the second row comprises a first sub-pixel connected to the fourth transmission metal line or the fifth transmission metal line and a second sub-pixel connected to the sixth transmission metal line,

wherein the second sub-pixel of the first pixel and the first sub-pixel of the second pixel are located in different columns,

wherein the image processor performs auto focus processing based on one of a first mode and a second mode, and

wherein, in the second mode, the image processor performs the auto focus processing based on a pixel voltage corresponding to the second sub-pixel of the first pixel and a pixel voltage corresponding to the first sub-pixel of the second pixel among pixel voltages output from the first and second rows of the pixel array.