ImageGear Professional DLL for Windows
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.

 

 


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