The table lists benchmarked wall-clock execution times for separate runs of the original Matlab implementation of image preprocessing for seafloor image classification. Specific timed tasks include (1) image load from JPEG files, (2) image enhance and color correct, (3) calculation of image red, green, and blue histograms, (4) calculation of a grayscale image and DCT coefficients, and (5) image save for the enhanced image. All benchmarks run on a 6-core 3.33 GHz Intel processor with 12 Gbytes of DDR3 memory.