4. The non-transitory computer readable medium according to claim 2 , the process further comprising: calculating a reliability degree of each of the text regions on the basis of the content of the original text extracted from a corresponding text region; and estimating a new text region candidate on the basis of an area of a new text region obtained by merging text regions for which the reliability degree is calculated to be lower than a predetermined threshold and on the basis of a total area of the text regions which have not been merged, wherein the estimated new text region candidate is displayed.
2. The non-transitory computer readable medium according to claim 1 , wherein, in the editing of the text regions, in accordance with a divide instruction received on the display device, a single text region displayed on the display device is divided so as to be displayed on the display device as two or more separate text regions.