Image File Formats

This chapter provides an overview of the image formats supported by PhotoZoom Pro 4, and their specifications.

Note that this overview concerns the stand-alone version of PhotoZoom Pro 4. The Automation Plug-in and Export plug-in versions can process a wider range of image formats, including PSD, EPS, and Raw formats. The Automation plug-in also supports HDR images. When using the Export plug-in, you can save your files only with a supported format (such as TIFF). The Automation plug-in does not have any such restriction.

    Format:
 TIFF JPEG PNG TGA BMP GIF
Features:
Max resolution (pixels) 1 million x 1 million 32767 x 32767 1 million x 1 million 65535 x 65535 32767 x 32767 32767 x 32767
Max file size 4 gigabyte 2 gigabyte 16 exabyte 2 gigabyte 2 gigabyte 1 gigabyte
Compression yes1 yes (lossy) yes (lossless) yes2 yes2 yes (lossy)
Color models:
RGB yes yes yes yes yes yes3
CMYK yes yes n/a n/a n/a n/a
Lab yes n/a n/a n/a n/a n/a
Grayscale yes yes yes yes yes n/a
Channel types:
8 bit channels yes yes yes yes yes yes
16 bit channels yes n/a yes n/a n/a n/a
Alpha channel yes (multiple) n/a yes yes n/a n/a
Profiles / metadata:
ICC profiles yes yes yes n/a n/a n/a
Exif profiles yes yes n/a n/a n/a n/a
IPTC profiles yes yes n/a n/a n/a n/a
XMP profiles yes yes n/a n/a n/a n/a

n/a: This option is not supported by the image format.

1: The TIFF format supports both lossless and lossy (JPEG-based) compression. When saving images as TIFF, you can choose what kind of compression you prefer.

2: The format supports run-length compression. PhotoZoom Pro 4 can open them, but saves uncompressed images.

3: The GIF format supports palette colors only, and is typically used for low-quality (256 color) images. PhotoZoom Pro 4 can open GIF images (and treats them as RGB), but does not save them as GIF.