Abstract: The present invention relates to a computer-implemented analysis of spatial abundance of poly-A containing RNA in a tissue sample, comprising the steps of: (i) obtaining imaging data and the sequencing data, (ii) registering the imaging data and detecting the beads, and employing a first machine learning method to obtain a first barcode set from the imaging data, (iii) processing the sequencing data to obtain a second barcode set from the sequencing data, (iv) processing the first and second barcode sets by an optimal transport framework and/or supervised machine learning to match the data sets to each other and to obtain matched barcodes, (v) outputting based on the matched barcodes a matrix holding the expression values for each gene that was identified in each bead found in the data.