File formats
Learn the differences between commonly used Photoshop image file formats!
Main file format attributes:
PSD
PSB
TIFF
JPEG
PNG
GIF
PDF
EPS
Layers
Alpha channels
Spot channels
Clipping paths
Transparency
Color profile
Dither
Embedded XMP metadata
Control Compression
BMP
WBMP
Mac only
Options specific to file formats:
PSB - Large Document Format
PDF - Portable Document Format
EPS - Encapsulated Post-Script
- max number of pixels is 300.000 by 300.000
- can be secured to view but not print and/or copying content
- when opened in Photoshop the vector data is rasterized
- Photoshop CS and later can open it
- text layers are maintained provided Preserve Editing
- encoding options are ASCII, Binary and JPEG
Capabilities is selected
- DCS 2.0 is a version of EPS
JPEG - Joint Photographic Experts Group
PNG - Portable Network Graphics
TIFF - Tagged Image File Format
- Progressive - enables low quality quick preview in the
- PNG-8 supports dither, PNG-24 does not
- three compression methods (LZW, Zip and JPEG)
browser and image is downloaded in multiple passes
- Interlace - file size is increased and image is downloaded in
- maximum image size is 4 GB
- Save for Web > Blur can reduce the file size
multiple passes
- can save high dynamic range images (HDR) as 32-bits per
- lossy compression (quality setting on a scale of 13, 0 to
channel files
12, with 12 being the highest quality and biggest file size)
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