The article considers the well-known methods for comparing graphic images. To improve the accuracy of comparison of low-informative images, which are used as formalized symbols of elements on topographic maps, the paper proposes a method for comparing low-informative graphic images, consisting of a set of image comparison methods - the root mean square deviation of the pixels of one image from another and the method of pixel-by-pixel comparison of images. The definition of a formalized graphic document is given. A detailed description of the proposed methodology is presented. By way of example of two data sets, consisting of graphic elements distributed by classes depending on their style, the operation of the technique was tested and the optimal parameters were experimentally selected in the context of solving the problem. The results of the computational experiments carried out in the paper showed the effectiveness of its application in comparison with known methods for solving the problem.

Keywords: image comparison, technique, formalized graphic document, root mean square deviation, pixel-by-pixel comparison, experiment, low-informative image, class, topographic map, image size