richarddmorey

#' Create cover images for talks from a folder of PDFs
#' 
#' Requires imagemagick to be installed and in the path for the convert command
#' @param pdf_dir Directory containing PDF files of papers
#' @param img_dir Directory to output all the image files
#' @param crop_height How big to make the cropped images, relative to full page
#' @param fade_height How much of the image to fade to transparent at the bottom
#' @param density resolution for PNG images
#'
create_covers = function(pdf_dir, img_dir, crop_height = .5, fade_height = .25, density = 300){