ImageStitch
ImageStitch[{image1,image2,…}] gives a composed image from an unordered list of imagei.
ImageStitch[{{image11,image12,…},{image21,image22,…},…}] returns a stitched image from a matrix of images imageij, according to their array position.
ImageStitch[images,canvas] projects the stitched image onto the geometry specified by canvas.
Please visit the official Wolfram Language Reference for more details and examples on core symbols.