Update tensorflow.markdown (#10183)

* Update tensorflow.markdown

Update with examples of scan interval and callng the scanning process based on state from an entity

* ✏️ Tweak

source/_components/tensorflow.markdown

@@ -160,3 +160,25 @@ image_processing:
 ## Optimising resources
 
 [Image processing components](/components/image_processing/) process the image from a camera at a fixed period given by the `scan_interval`. This leads to excessive processing if the image on the camera hasn't changed, as the default `scan_interval` is 10 seconds. You can override this by adding to your config `scan_interval: 10000` (setting the interval to 10,000 seconds), and then call the `image_processing.scan` service when you actually want to perform processing.
+
+```yaml
+# Example advanced configuration.yaml entry
+image_processing:
+  - platform: tensorflow
+    scan_interval: 10000
+    source:
+      - entity_id: camera.driveway
+      - entity_id: camera.backyard
+```
+
+```yaml
+# Example advanced automations.yaml entry
+- alias: Tensorflow scanning
+  trigger:
+     - platform: state
+       entity_id:
+         - binary_sensor.driveway
+  action:
+    - service: image_processing.scan
+      entity_id: camera.driveway
+```