An image processing device, comprising: a first image acquisition unit (421, 521) that is configured to acquire an image of a driver of a vehicle at a first frame rate; a region determination unit (423, 702) that is configured to determine a region including eyes of the driver in the image acquired by the first image acquisition unit; a second image acquisition unit (424, 524, 703) that is configured to acquire an image of the region at a second frame rate higher than the first frame rate; a processing unit that is configured to process an image of the region acquired at the second frame rate to recognize or discriminate a consciousness level of the driver; and a control unit that is configured to control switching of a driving mode of the vehicle according to the consciousness level of the driver recognized or discriminated by the processing unit, wherein the processing unit is configured to recognize or discriminate the consciousness level of the driver according to a tracking result of eye movement of the driver on a basis of the image in the region, wherein the processing unit is configured to track at least one action of saccade and microsaccade of the eyes of the driver, and wherein the processing unit is configured to recognize or discriminate the consciousness level of the driver on a basis of a comparison result between the eye movement of the driver and a saliency map by detecting the correlation between the direction of the visual line of the driver and the saliency map, wherein the saliency map is a two-dimensional distribution map that represents the probability distribution of positions naturally seen by the driver due to the visual characteristics of a target. a first image acquisition unit (421, 521) that is configured to acquire an image of a driver of a vehicle at a first frame rate; a region determination unit (423, 702) that is configured to determine a region including eyes of the driver in the image acquired by the first image acquisition unit; a second image acquisition unit (424, 524, 703) that is configured to acquire an image of the region at a second frame rate higher than the first frame rate; a processing unit that is configured to process an image of the region acquired at the second frame rate to recognize or discriminate a consciousness level of the driver; and a control unit that is configured to control switching of a driving mode of the vehicle according to the consciousness level of the driver recognized or discriminated by the processing unit, wherein the processing unit is configured to recognize or discriminate the consciousness level of the driver according to a tracking result of eye movement of the driver on a basis of the image in the region, wherein the processing unit is configured to track at least one action of saccade and microsaccade of the eyes of the driver, and wherein the processing unit is configured to recognize or discriminate the consciousness level of the driver on a basis of a comparison result between the eye movement of the driver and a saliency map by detecting the correlation between the direction of the visual line of the driver and the saliency map, wherein the saliency map is a two-dimensional distribution map that represents the probability distribution of positions naturally seen by the driver due to the visual characteristics of a target.