Automatic analysis of microscopic photo-pictures of undeveloped and developed nuclear emulsions

Methods of automatic computer analyses of images have large impotence in numerous physical problems with different kinds of radiations, which use such solid-state detectors as nuclear photographic emulsions, plastics and others. We described a method of expanding boundaries of dark areas for such computer analyses of micro-pictures. We demonstrated effectiveness of this method by the example of the search of microcrystals size distributions in two undeveloped nuclear emulsions and similar distribution of background grains in the developed emulsion. - Highlights: • This work deals with automatic analysis of micro-images in nuclear photoemulsions. • A simple method of expanding regions for micro-image analyses was described. • Its efficiency was tested for measurement of distributions of AgBr microcrystal sizes. • Either its efficiency was tested for measurement of distributions of developed grains. • This method is designed for numerous physical problems of nuclei and particles.