| 8.3. Edge | ||
|---|---|---|
|
8. Filtre til kantdetektering |  |
| 8.3. Edge | ||
|---|---|---|
|
|
8. Filtre til kantdetektering | |
![[Bemærk]](images/note.png)
|
Bemærk |
|---|---|
|
Disse indstillinger er beskrevet i Afsnit 2, “Fælles funktioner”. |
Edge detector offers several detection methods:
Here, this method has no options and so is less interesting than the specific Sobel.
After applying the filter (Sobel option)
Result doesn't look different from Sobel.
After applying the filter (Prewitt compass option)
Edges are thinner, less contrasted and more blurred than Sobel.
After applying the filter (Gradient option)
No evident difference from Sobel.
After applying the filter (Roberts option)
Edges less bright.
After applying the filter (Differential option)
Less interesting than the specific one.
After applying the filter (Laplace option)
A low value results in black, high-contrasted image with thin edges. A high value results in thick edges with low contrast and many colors in dark areas.
Where the edge detector will get adjoining pixels for its calculations when it is working on the image boundaries. This option will only have an effect on the boundaries of the result (if any). Clamp is the default and the best choice.
