ImageGear Professional DLL for Windows
Region of Interest Processing
| ImageGear Professional v18.2 > User Guide > Using ImageGear > Processing Images > Region of Interest Processing |
This group of functions allows you to apply image processing and special effects functions on an arbitrary region of interest (ROI). You can specify a shape, such as ellipse, polygon, or freehand, or a 1-bit mask for identifying which pixels to include/exclude from image processing algorithms.
To apply an image processing function on a non-rectangular ROI, create the ROI using IG_IP_NR_ROI_to_HIGEAR_mask(), or use a 1-bit image, and associate it with the HIGEAR handle on which you are going to apply the processing function, using IG_IP_NR_ROI_mask_associate(). Consequent calls to image processing functions on this image will only affect the area specified by the ROI.
| IG_IP_NR_ROI_control_get() | Returns the current ROI control settings. |
| IG_IP_NR_ROI_control_set() | Detects an area of pixels using a specified threshold. |
| IG_IP_NR_ROI_mask_associate() | Associates a mask HIGEAR, as specified by the AT_NR_ROI_MASK structure, with the image referenced by hIGear. |
| IG_IP_NR_ROI_mask_delete() | Deletes the mask HIGEAR created by IG_IP_NR_ROI_to_HIGEAR_mask(). |
| IG_IP_NR_ROI_mask_dilate() | Dilates ROI mask by the specified number of pixels. |
| IG_IP_NR_ROI_mask_erode() | Erodes ROI mask by the specified number of pixels. |
| IG_IP_NR_ROI_mask_unassociate() | Removes the non-rectangular ROI information from a HIGEAR image, but does not delete the mask HIGEAR. |
| IG_IP_NR_ROI_to_HIGEAR_mask() | Builds a non-rectangular ROI mask from a set of segment descriptors that you pass in. |