Specialized Usage : Working with Images : Working with Raw Images : Canon DC Raw Image & Thumbnail File
   
Canon DC Raw Image & Thumbnail File
Most cameras supporting Canon CRW files create additional thumbnail files. Along with a 160 x 120 JPEG thumbnail of the original image in the associated CRW file, these files contain the EXIF information and optionally IPTC information. They always have the same name as the original CRW file, but with a THM file extension.
Cumulus supports these THM files. If the Canon Raw Metadata Support is activated in the Asset Handling Set employed for the CRW image, the THM files are treated as follows:
If an image of this format is cataloged, the associated THM file will not be cataloged but the information it contains will be captured by Cumulus and stored in the record for the image.
NOTE: If the Canon Raw Metadata Support is activated when cataloging, you get a list displayed that informs you of the THM files that have not been cataloged.
If you employ Cumulus to manage the cataloged image (copy, move, email or delete), the associated THM file will be processed as well. Only when you employ the special copy function to select a category and then copying the associated assets by dragging this category on your desktop, the THM files will not be copied as well.
If you rename the assets employing the Cumulus Rename To function, the THM files will not be renamed as well.
The Canon Raw Metadata Support is activated by default. If you want to deactivate it for certain Asset Handling Sets, see “(De)activating Asset Handling­ Modules” .