Before I go on, let me congratulate the Coppermine developers for a fine product. This is just one warning that could catch the unaware…
I noticed this problem when adding a bunch of new pictures to my Coppermine Gallery. There were a few pictures that needed rotation, so I used the built-in features to scale them. I did not carefully select all the options provided, and got burned as a result. The pictures that I rotated were reduced to super poor quality, as if the JPG filter had a quality setting of “None”.
This happened because I didn’t fiddle with all the dials available… On the editing screen for Coppermine, they provide the output resolution for the picture in a drop down list (see below). The drop down list is entitled “JPEG Output Quality” and I personally recommend picking the highest quality available (100%) to avoid losing further resolution during the cropping or rotating process.
![](https://feistymeow.org/wp-content/uploads/2018/10/coppermine_jpeg_quality_selector.png)
If you carefully remember to dial up the resolution when you modify your pictures, then everything’s great. Forget this, and you get fuzzy blurry nothing pictures as a result. So, clearly it is better to remember to change the resolution!
This post is to serve as a warning to those who hadn’t encountered this issue yet and also as a Note to Self for me to remember to change that quality setting every time I mess with pictures in Coppermine Gallery.