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, 1 year ago
java.lang.IllegalArgumentException: Output List can't be null	at org.opencv.utils.Converters.Mat_to_vector_vector_Point(	at org.opencv.imgproc.Imgproc.findContours(	at fyp.hkust.facet.activity.ColorizeFaceActivity.detectRegion(	at fyp.hkust.facet.activity.ColorizeFaceActivity.access$1600(	at fyp.hkust.facet.activity.ColorizeFaceActivity$5.onClick(	at android.view.View.performClick(	at android.view.View$	at android.os.Handler.handleCallback(	at android.os.Handler.dispatchMessage(	at android.os.Looper.loop(	at	at java.lang.reflect.Method.invoke(Native Method)	at$	at