message: 16bit bitdepths for tiff
diff: @@ -63,7 +63,9 @@ impl From<tiff::ColorType> for ColorType {
  tiff::ColorType::GrayA(8) => ColorType::LA,
  tiff::ColorType::GrayA(16) => ColorType::LA16,
  tiff::ColorType::RGB(8) => ColorType::RGB,
  + tiff::ColorType::RGB(16) => ColorType::RGB16,
  tiff::ColorType::RGBA(8) => ColorType::RGBA,
  + tiff::ColorType::RGBA(16) => ColorType::RGBA16,
  tiff::ColorType::CMYK(_) => unimplemented!(),
  _ => unimplemented!(),
  }
  