# Does PVR image format support indexed image?

**URL:** <https://forums.imgtec.com/t/does-pvr-image-format-support-indexed-image/2140>\
**Category:** PowerVR Insider\
**Tags:** pvrtextool\
**Created:** [August 12, 2014, 12:11pm UTC](https://forums.imgtec.com/t/does-pvr-image-format-support-indexed-image/2140 "2014-08-12T12:11:22Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![xpol-2](https://avatars.discourse-cdn.com/v4/letter/x/bcef8e/32.png) [@xpol-2](https://forums.imgtec.com/u/xpol-2)\
**Post date:** [August 12, 2014, 12:11pm UTC](https://forums.imgtec.com/t/does-pvr-image-format-support-indexed-image/2140/1 "2014-08-12T12:11:22Z")

</div>

Does PVR image format support indexed image?  
  
  
  
What’s the different between ‘i’ and ‘l’ channel names in PVRTexTool Command-Line tool?

---

<div class="post-metadata">

**Author:** ![pauls](https://avatars.discourse-cdn.com/v4/letter/p/b3f665/32.png) [@pauls](https://forums.imgtec.com/u/pauls)\
**Post date:** [August 13, 2014, 8:11am UTC](https://forums.imgtec.com/t/does-pvr-image-format-support-indexed-image/2140/2 "2014-08-13T08:11:52Z")

</div>

Hello Xpol,  
  
  
  
indexed images, also know as palette images are not supported by PVR Image formats.  
  
  
  
The ‘i’ channel stands for intensity which is calculated as i=(R+G+B)/3.  
  
The ‘l’ channel stands for luminosity which is calculated as L=0.2126 R + 0.7152 G + 0.0722 B.  
  
  
  
Thanks,  
  
Paul