Print TIFFs to web images

Product photos usually start as print masters: CMYK, sometimes layered, sometimes 16-bit, often with a clipping path. A naive conversion gives dull or inverted colours, white holes in the product, or files ten times too big.

Rules before any batch

• Masters are read-only. Read from the master folder or share, write to a separate output folder, and never write next to the source.
• Call magick, never convert. In ImageMagick 7 the command is magick in out; magick convert is the deprecated v6 form. On Windows a bare convert can resolve to the system's convert.exe, a disk filesystem converter. Use the full path to magick from an environment variable or config.
• Take one sample per source type (CMYK, RGB, layered, with clipping path) through the pipeline and look at the results before running the whole set.

Colour