Integration Period and Scanning Mode
Each scanning line corresponds to the signal of that line or row of the sensor array. In progressive scanning mode, a frame is formed by one field, therefore the frame information is equal to that of the field. A vertical blanking interval then follows to complete one frame of scanning. One serial output starts with the first scanning line, that is, the signal of the first line of the pixel array. Before the second scanning line, a horizontal blanking interval appears, which was necessary for the electron beam from the end point of the first line to the top of the second line in image pickup tubes and CRT displays. The resolution of a still image does not depend on the number of the scanning field, because exposure time is controlled by an optical shutter to capture in progressive mode.