/test/input/

• ../
• black.pgm
• gray-truncated.pgm
• gray.pgm
• real-world-image.0.pgm
• real-world-image.1.pgm
• real-world-image.2.pgm
• real-world-image.3.pgm
• real-world-image.4.pgm
• single-frame.pgm
• white-whiteval.pgm
• white.pgm