Image - Create Thumbnails

This option will create thumbnails for the selected images. The location and naming of the images depends on whether "Local Thumbnails" or "Thumbnails with main image" is selected. You will be asked to specify the maximum width and height for your thumbnails. These will default to the current thumbnail display dimensions also specified in View - Options. In this option any images in your selection that have already got thumbnails will have those thumbnails overwritten, whereas the auto create thumbnails option (below) will only create thumbnails for images that do not currently have them. This option therefore allows you to overwrite existing thumbnails possibly to make them smaller (or larger). Note as well that this option will never use the thumbnail data already in memory and will always reread the main image file. this is necessary in case you have modified the image externally and this will update the thumbnail. This option can be used to change the selected thumbnails between "local thumbnails" and "thumbnails with main image".

Local Thumbnails
Each thumbnail will be given a name corresponding to the image's internal ID number (this number can be viewed in Image Properties) and will be stored in the database local thumbnail folder (see View - Options).

Thumbnails with main image
Each thumbnail will be named with the same name as the image along with a prefix/suffix as defined in View - Options, and stored in the same location as the main image.  

Image - Auto Create Thumbnails

This option will scan all the images in your database and automatically create thumbnails for any images that do not already have them. The location and naming of the images depends on whether "Local Thumbnails" or "Thumbnails with main image" is selected. You will be asked to specify the maximum width and height for your thumbnails. These will default to the current thumbnail display dimensions also specified in View - Options. If you wish to overwrite existing thumbnails then use the Create Thumbnails option above. This option will use the thumbnail image data in memory if appropriate - ie if the image data in memory is at least as big as the required thumbnail dimensions. This option can be used to change all thumbnails between "local thumbnails" and "thumbnails with main image".

Local Thumbnails
Each thumbnail will be given a name corresponding to the image's internal ID number (this number can be viewed in Image Properties) and will be stored in the database local thumbnail folder (see View - Options).

Thumbnails with main image
Each thumbnail will be named with the same name as the image along with a prefix/suffix as defined in View - Options, and stored in the same location. 

Important Notes
ImageDB does not actually require thumbnails in order to run, however without them it must read all the complete image files when it is loaded before it can display them as thumbnails. This can make the loading of a database take considerably longer so the use of thumbnail files is strongly recommended especially if your image files are large (high resolution). Also thumbnail images are required for all images used in  generating web sites.

You may prefer to use your own thumbnail generation program. Should you do this they must have the same name as the main image file along with a prefix/suffix as defined in View - Options, and stored in the same location.

Selecting a larger size than the current display dimensions will result in very slow thumbnail generation as the full image file will have to be re-read for each thumbnail.

If no thumbnail file is available the displayed thumbnail will have a thin red border. When browsing this is probably normal but when viewing database images it is an indication that you should probably create thumbnails for efficiency.

Locally stored thumbnails will be displayed with a black border and thumbnails stored with the main image will be stored with a dark green border. See Thumbnail Surrounds.

 

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