A method of operation of an optical character recognition pre-localization system, comprising receiving an image having an original frame to be pre-processed for optical character recognition, applying a pyramid filter to the original frame in order to create a filtered image containing blobs to be analyzed as potential regions of interest that may contain characters, tiling the filtered image into a set of tiles of a defined tile size, and for each tile, determining a contrast, a module value and a gradient angle, identifying a first tile of the set of tiles of the filtered image, wherein the contrast and the module values of the first tile are higher than a respective contrast threshold and module threshold, and generating at least one region of interest of the original frame to be passed to an optical character recognition decoding module based on the first tile, and related systems.