1. An image reading control apparatus which causes an image sensor to read an image from an original placed on an original platen, comprising: an input unit configured to input a size of the original; a setting unit configured to set a reading range of the image sensor based on the size input by the input unit; a control unit configured to control the image sensor to read an original in the reading range set by the setting unit; and a comparison unit configured to compare characteristics of images in a plurality of areas in a reading area obtained by the reading, wherein the control unit controls the image sensor to interrupt reading of the reading range set by the setting unit in accordance with a comparison result obtained by the comparison unit; the image reading control apparatus further comprising a determination unit configured to determine whether to read a remaining image in accordance with the comparison result obtained by the comparison unit, wherein the control unit controls the image sensor to read the remaining image in a case where it is determined by the determination unit that the remaining image is to be read, and controls the image sensor to interrupt reading in a case where it is determined by the determination unit that the remaining image is not to be read.