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--- settings_image [2022/03/28 19:00]
yves
+++ settings_image [2022/03/28 19:53]
yves [Cache settings]
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 In the image settings section image compression and tile related values can be configured.
-{{ :image.png?nolink&400 |}}
+{{::settings_img_menu.png?200|}}
+==== Image settings ====
-{{ :image2.png?nolink&600 |}}
+{{::settings_img.png?400|}}
+^ Field ^ Description ^
+| Tile size | The size of each side of the served tiles in pixels. A value of 400 indicates that resulting tiles will be 400 x 400 pixels in size |
+| Image format | The image format for all the served images (tiles, thumbnails, snapshots etc.). This can be JPEG ([[https://en.wikipedia.org/wiki/Lossy_compression|lossy compression]]) or PNG ([[https://en.wikipedia.org/wiki/Lossless_compression|lossless compression]]) |
+| Tile quality | A value in the 1 to 100 range. This number defines the image quality for lossy compression schemes. Default value is 100 (equal to 100% quality). The parameter does //not// apply when the image format is set to PNG. [[impact_of_tile_quality_on_data_traffic|See what impact this has on data traffic]]. |
+Don't forget to press the "Save" button before navigating away from this page.
+==== Cache settings ====
+{{:settings_img_cache.png?400|}}
+In the cache settings section the cache strategy of the system can be defined.
+The learn more about what kind of data is cached in general, see [[caching|this page]].
+^ Field	^ Description ^
+| Use cache | Indicates whether or not the system caches requested tiles. By default, caching is turned off. |
+| Cache path | The directory where cache files are stored. This is a web application relative path |
+| Retention days | The number of days after which a cache file is automatically erased by the system |
+| Tile cache | Indication of current space consumption of cached tiles |
+| S3 cache | Indication of current space consumption of cached chunks of slides that reside on S3 storage |
+| Total cache size | Accumulated cache space consumption |
+=== Operations ===
+^ Operation ^ Description ^
+| Empty cache older than retention days | Erase cache files that haven't been consulted recently |
+| Empty cache for orphan slides | Erases cache files for slides that do not exist anymore |
+| Empty all cache | Erases all cache files |
+| Save | Saves the cache settings |
+Don't forget to press the "Save" button before navigating away from this page.
+==== Barcode settings ====
+{{:settings_img_barcode.png?400|}}
+^ Field ^ Description ^
+| Try harder to read barcode texts | ... |
+| Disable barcode scanning | ... |
+Don't forget to press the "Save" button before navigating away from this page.

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