ImageGear provides several functions whose specific purpose is to correct an image's appearance. The functions in this group include:
| IG_IP_despeckle() | Removes noise from a 1-bit image, using a 3x3 median filter on the image. |
| IG_IP_median() | Uses a median filter to reduce noise in 8-bit gray level and 24-bit images. |
| IG_IP_deskew_auto() | De-skews a 1-bit image that was created by reading a text file. You can specify a threshold angle below which de-skewing should not be performed. |
| IG_IP_deskew_angle_find() | Will analyze a 1-bit image and report to you the angle at which it is skewed. |
In general, you would use the image correction functions with images that have been obtained by scanning text documents or graphical images.