On Canon Powershot cameras that don't have the super-fine quality feature, you can enable it as a CHDK quality override.

Here is a 100% cropped region of two JPEG images. The image on the left was shot at normal quality and the image on the right was shot at super-fine quality.

Normal Quality vs Super-Fine Quality - Click to view at 100%.

CHDK Menu

1.Enable CHDK
2.Turn on ALT mode. Press the menu button to open the CHDK Menus.
3.Open the Extra Photo Operations menu and scroll down to the bottom of the menu.
4.Change the Quality Override to Super-fine.

4. Quality Override

Now JPEG images will be taken at the highest quality possible. If you want an uncompressed image you should try shooting with CHDK DNG RAW images.

Here is a file size comparison of the same scene shot at 3 different quality settings:

• Normal Quality 745 KB
• Fine Quality 2.1 MB
• Super-Fine Quality 3.5 MB

One Response to “Enabling Super-Fine Quality JPEG using CHDK”

1. Ed says:

   October 2, 2011 at 11:35 pm

   Thank you, thank you, thank you -- through this blog post, I just tested, and I can take my Powershot S95 from fine (quality level 88) to superfine (qual. level 95)!

   this is great --