A device for time delay and integration imaging, said device comprising: an image sensor, which is arranged to acquire an image, said image sensor comprising: pixels, which are arranged in columns and rows forming a plurality of adjacent rows over an area of the image sensor, wherein each pixel comprises a photo-active region, which is arranged to accumulate an electric charge proportional to intensity of electro-magnetic radiation incident on the photo-active region, and a transmission region, which is arranged to receive the accumulated electric charge from the photo-active region, an optical element, which is aligned with rows of pixels and arranged to selectively pass different wavelengths of electro-magnetic radiation to different rows of pixels; a first control structure for controlling and timing transfer of accumulated electric charges from the photo-active regions to the transmission regions in pixels; and a second control structure for controlling and timing transfer of accumulated electric charge in the transmission region of each row of pixels to the adjacent row below, wherein the first and second control structures (26; 32) are configured to control the image sensor to alternately transfer accumulated charges in photo-active regions to the transmission regions of pixels and transfer the accumulated electric charge in transmission regions from one row to the adjacent row below whereby electric charges accumulated in photo-active regions in a column of pixels are added to each other, and wherein accumulated charges in a lower-most row of the image sensor are output to a read-out structure; wherein said first control structure comprises a plurality of row structures which are arranged to control whether the accumulated electric charge in the photo-active region of at least one row is to be output to the transmission region of said at least one row such that the row structures select whether the charge in the photo-active regions of respective rows are added to the accumulated electric charge in the transmission region; and wherein each row of pixels is controlled by one of the row structures of the first control structure to control whether the accumulated electric charge in the photo-active region of the row is to be output to the transmission region of the row. pixels, which are arranged in columns and rows forming a plurality of adjacent rows over an area of the image sensor, wherein each pixel comprises a photo-active region, which is arranged to accumulate an electric charge proportional to intensity of electro-magnetic radiation incident on the photo-active region, and a transmission region, which is arranged to receive the accumulated electric charge from the photo-active region, an optical element, which is aligned with rows of pixels and arranged to selectively pass different wavelengths of electro-magnetic radiation to different rows of pixels; a first control structure for controlling and timing transfer of accumulated electric charges from the photo-active regions to the transmission regions in pixels; and a second control structure for controlling and timing transfer of accumulated electric charge in the transmission region of each row of pixels to the adjacent row below, wherein the first and second control structures (26; 32) are configured to control the image sensor to alternately transfer accumulated charges in photo-active regions to the transmission regions of pixels and transfer the accumulated electric charge in transmission regions from one row to the adjacent row below whereby electric charges accumulated in photo-active regions in a column of pixels are added to each other, and wherein accumulated charges in a lower-most row of the image sensor are output to a read-out structure; wherein said first control structure comprises a plurality of row structures which are arranged to control whether the accumulated electric charge in the photo-active region of at least one row is to be output to the transmission region of said at least one row such that the row structures select whether the charge in the photo-active regions of respective rows are added to the accumulated electric charge in the transmission region; and wherein each row of pixels is controlled by one of the row structures of the first control structure to control whether the accumulated electric charge in the photo-active region of the row is to be output to the transmission region of the row.