In this paper. the problem of segmentation of halftone images is considered. in which areas of local maxima and minima (extrema) are distinguished with a monotonic change in the brightness of pixels from local extrema to the boundaries of areas. To solve this problem. https://qkfoujxa2756.blog2freedom.com/34913993/mycophagous-drosophilidae-diptera-guild-and-their-hosts-in-the-brazilian-amazon