OutlineMethod
Method the function uses when outlining the edges. For more information about filtering, refer to Chapter 5, Image Processing, of the NI Vision Concepts Manual.
Elements
| Name | Value | Description |
|---|---|---|
| IMAQ_EDGE_DIFFERENCE | 0 | The function uses a method that produces continuous contours by highlighting each pixel where an intensity variation occurs between itself and its three upper-left neighbors. |
| IMAQ_EDGE_GRADIENT | 1 | The function uses a method that outlines contours where an intensity variation occurs along the vertical axis. |
| IMAQ_EDGE_PREWITT | 2 | The function uses a method that extracts the outer contours of objects. |
| IMAQ_EDGE_ROBERTS | 3 | The function uses a method that outlines the contours that highlight pixels where an intensity variation occurs along the diagonal axes. |
| IMAQ_EDGE_SIGMA | 4 | The function uses a method that outlines contours and details by setting pixels to the mean value found in their neighborhood, if their deviation from this value is not significant. |
| IMAQ_EDGE_SOBEL | 5 | The function uses a method that extracts the outer contours of objects. As opposed to the Prewitt filter, the Sobel filter assigns a higher weight to the horizontal and vertical neighbors of the central pixel. |
| IMAQ_OUTLINE_METHOD_SIZE_GUARD | 0xFFFFFFFF | Reserved |