function resolve(path)
    if (not(pandoc.path.is_relative(path))) then
        return path
    end
    local input_path = PANDOC_STATE.input_files[1]
    local dir_path = pandoc.path.directory(input_path)
    return pandoc.path.join({dir_path, path})
end

function Image(img)
    local path = resolve(img.src)
    local size = pandoc.pipe('xargs', {'identify', '-format', '%wx%h'}, path)
    local width, height = size:match("(%d+)x(%d+)")
    img.attributes.width = width
    img.attributes.height = height
    return img
end