By default, parameters that improve processing of large images are disabled in ImageGear. Follow these steps to try ImageGear’s enhanced support for large images:
- Run the Image Processing sample.
- Go to Main menu > Settings > Parameters…
- Select “DIB.FILE_MAPPING.THRESHOLD” in the list of parameters and set its value to 500. This enables memory mapping file storage for DIBs that have uncompressed size of 500 Mb and more.
- Click Apply and close the dialog.
The sample is now ready to work with gigabyte-sized images.
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If you try loading a gigabyte-sized image into ImageGear without the file mapping being enabled, the system may become unresponsive because of excessive RAM usage by ImageGear. |
For additional convenience you can also enable the progress bar. Note though that ImageGear display operations do not trigger the progress bar.
- Go to Main menu > Settings > Progress Bar.
If you are not particularly interested in fine display for large images, you can turn the display interpolation off (after the image has been loaded). This will result in much faster image display.
- Go to Main menu > View > Anti-aliasing, and uncheck the Color Antialiasing and Use Resampling check boxes.