An image sensor which operates in a global shutter mode is provided. The image sensor includes a pixel array comprising a plurality of pixels arranged in a plurality of rows and columns, a timing generator configured to generate row driver control signals which controls an integration period of a pixel of the plurality of pixels to include at least two sub integration periods, and a row driver configured to generate a plurality of row control signals which controls each of the rows in the pixel array based on the row driver control signals, wherein the timing generator is further configured to control a single image frame to include the integration period and a readout period of the pixel, based on the row driver control signals.