ImageGear for C and C++ on Windows v19.0
IG_IP_detect_area
| API Reference Guide > Core Component API Reference > Core Component Functions Reference > Image Processing Functions > IG_IP_detect_area |
Detects an area of pixels using a user-defined pixel checker and returns the area being detected as a ROI structure.
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AT_ERRCOUNT ACCUAPI IG_IP_detect_area(
HIGEAR hIGear,
AT_INT xPos,
AT_INT yPos,
LPAT_VOID detectStruct,
LPFNIG_CHECK_PIXEL detectFunc,
LPAT_RECT lpRect,
AT_NR_ROI_MASK* lpMask
);
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| Name | Type | Description |
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| hIGear | HIGEAR | Image to analyze. |
| xPos | AT_INT | X coordinate of a point inside the area to be detected. |
| yPos | AT_INT | Y coordinate of a point inside the area to be detected. |
| detectStruct | LPAT_VOID | A pointer to a user-defined structure that will be passed to the callback function. See LPFNIG_CHECK_PIXEL. |
| detectFunc | LPFNIG_CHECK_PIXEL | Callback function that checks whether specified pixel belongs to the area or not. |
| lpRect | LPAT_RECT | Rectangular area to apply the effect to, or NULL for whole image. |
| lpMask | AT_NR_ROI_MASK* | Returns the ROI mask. |
Returns the number of ImageGear errors that occurred during this function call.
All pixel formats supported by ImageGear for C and C++.
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Actual set of pixel formats supported by this function can be narrower, depending on the implementation of the user-defined callback function. |