The HTTP handler use data that cached on server side. Cache parameters can be changed in the Web site's application settings (web.config file):

• The "VintasoftWebImaging_UploadDirectoryName" parameter defines name of directory where uploaded files must be stored. By default parameter has value "UploadedImageFiles" and uploaded files are stored in "/UploadedImageFiles" directory.
• The "VintasoftWebImaging_ResourcesDirectoryName" parameter defines name of directory where global resources must be stored. By default parameter has value "Resources" and global resources are stored in "/Resources" directory.
• The "VintasoftWebImaging_CacheDirectoryName" parameter defines name of directory where cached data must be stored. By default parameter has value "VintasoftCache" and cached data are stored in "/VintasoftCache" directory.
• The "VintasoftWebImaging_CachedThumbnailsDirectoryName" parameter defines name of directory where cached thumbnails must be stored. By default parameter has value "Thumbnails" and cached data are stored in "/VintasoftCache/Thumbnails" directory.
• The "VintasoftWebImaging_CachedImageTilesDirectoryName" parameter defines name of directory where cached image tiles must be stored. By default parameter has value "Tiles" and cached data are stored in "/VintasoftCache/Tiles" directory.
• The "VintasoftWebImaging_CacheLifeTime" parameter defines a value that determines how long, in minutes, cached object will be stored on server. By default parameter has value 60.

System.Object
   Vintasoft.Imaging.ImageProcessing.Web.HttpHandlers.VintasoftImageProcessingHandler

Target Platforms: .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

Reference

VintasoftImageProcessingHandler Members
Vintasoft.Imaging.ImageProcessing.Web.HttpHandlers Namespace