Unterschiede
Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
Beide Seiten der vorigen Revision Vorhergehende Überarbeitung Nächste Überarbeitung | Vorhergehende Überarbeitung | ||
projekte:vector_graphics_adapter_en [2015/12/13 11:40] – da1l6 | projekte:vector_graphics_adapter_en [2017/03/01 19:19] (aktuell) – Externe Bearbeitung 127.0.0.1 | ||
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* The edgedetect filter from ffmpeg/ | * The edgedetect filter from ffmpeg/ | ||
- Follwing the edge detection a second filter is used to extract the contours from the image. The FindContours function from openCV takes the image and extracts its contours as paths of vectors (--vf vector). | - Follwing the edge detection a second filter is used to extract the contours from the image. The FindContours function from openCV takes the image and extracts its contours as paths of vectors (--vf vector). | ||
- | * The same filter iterates over these paths to create a " | + | * The vector |
* The availiable " | * The availiable " | ||
* The ffmpeg edgedetect filter provides an intensity value in its output depending on how sharp an edge is. | * The ffmpeg edgedetect filter provides an intensity value in its output depending on how sharp an edge is. | ||
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* With ffmpeg edge detection:< | * With ffmpeg edge detection:< | ||
* With openCV edge detection:< | * With openCV edge detection:< | ||
- | * The optimal values for t1 (bzw. low) and t2 (bzw. high) can depend on source video. Just try a few. | + | * The optimal values for t1 (or low) and t2 (or high) can depend on source video. Just try a few. |
* The canny edge detection is a CPU hog. Because of this '' | * The canny edge detection is a CPU hog. Because of this '' | ||
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< | < | ||
+ | ==== Screen Capture ==== | ||
+ | {{ : | ||
+ | |||
+ | This works with both raster and pure vector mode. The Image on the right is made using raster mode. | ||
+ | |||
+ | < | ||
+ | |||
+ | Video input devices like TV, Webcams and more can be accessed as well: | ||
+ | < | ||
===== Digital oscilloscopes ===== | ===== Digital oscilloscopes ===== | ||
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* Use a low memory depth (e.g. ~7kPoints). | * Use a low memory depth (e.g. ~7kPoints). | ||
* Try adjust the DSO sample rate to find the spot of minimal noise. | * Try adjust the DSO sample rate to find the spot of minimal noise. | ||
+ | |||
+ | ===== Our other VGA to Oscilloscope Projects ===== | ||
+ | * [[https:// | ||