Overview
Delegate used to receive notifications for a detected item over time.
Inherits <NSObject>.
Instance Method Summary | |
| (void) | - dataOutput:detectedFeature: |
| Called to initially inform the delegate that a new item has been detected. More... | |
| (void) | - dataOutput:updateFocusingFeature:forResultSet: |
| As a feature is detected over time, this method is called to give an update for the feature in the context of the overall detection. More... | |
| (void) | - dataOutput:updateMissingFeatures: |
| Called if either the tracked feature was not detected at all in a frame, or if the specific feature identity associated with the delegate is not present in the current frame. More... | |
| (void) | - dataOutputCompletedWithFocusingFeature: |
| Called to indicate the feature associated with the tracking ID previously reported via dataOutput:detectedFeature: has been assumed to be gone forever. More... | |
Method Detail
| - (void) dataOutput: | (GMVDataOutput *) | dataOutput | |
| detectedFeature: | (GMVFeature *) | feature | |
Called to initially inform the delegate that a new item has been detected.
The tracking ID will remain constant for all calls to dataOutput:updateFocusingFeature:forResultSet: until dataOutputCompletedWithFocusingFeature: is called. dataOutput:updateFeatures:focusingFeature: is always called immediately following this method call, with the same item that was passed into this method.
- Parameters
-
dataOutput The GMVDataOutput object requesting the call. features The newly detected GMVFeature.
| - (void) dataOutput: | (GMVDataOutput *) | dataOutput | |
| updateFocusingFeature: | (GMVFeature *) | feature | |
| forResultSet: | (NSArray< __kindof GMVFeature * > *) | features | |
As a feature is detected over time, this method is called to give an update for the feature in the context of the overall detection.
Each feature that is received has the same tracking ID as it had in the most recent call to dataOutput:detectedFeature:. That is, it has been determined to be the same tracked feature initially seen.
- Parameters
-
dataOutput The GMVDataOutput object requesting the call. feature The GMVFeature associated with the delegate. features The full detection results.
| - (void) dataOutput: | (GMVDataOutput *) | dataOutput | |
| updateMissingFeatures: | (NSArray< __kindof GMVFeature * > *) | features | |
Called if either the tracked feature was not detected at all in a frame, or if the specific feature identity associated with the delegate is not present in the current frame.
It's possible that the feature may be missed for a few frames, and will reappear later, depending upon the detector settings. dataOutput:updateFocusingFeature:forResultSet: would then be called.
- Parameters
-
dataOutput The GMVDataOutput object requesting the call. features The full detection results.
| - (void) dataOutputCompletedWithFocusingFeature: | (GMVDataOutput *) | dataOutput |
Called to indicate the feature associated with the tracking ID previously reported via dataOutput:detectedFeature: has been assumed to be gone forever.
- Parameters
-
dataOutput The GMVDataOutput object requesting the call.