gesture-recognition

问题 I'd like to highlight a hand for real-time gesture recognition. I observed that the image of a hand gets highlighted differently for different colour channels using the cv2.imsplit function. But this split function is very costly in terms of time. I'm not able to perform the same functionality using Numpy indexing (as given on the official page) 回答1: You can use numpy's slice: import cv2 import numpy as np ## read image as np.ndarray in BGR order img = cv2.imread("test.png") ## use OpenCV

问题 Now, the image is smoothly rotating only from left to right when I make a gesture of 360 degree. Required result: Should rotate from right to left when we make a gesture of 360 degree. Done : Should rotate from right to left when we make a gesture of 360 degree. Once we start rotating from left to right at some point and again back to right to left it should rotate from either direction from which the gesture is made. import 'dart:math'; import 'package:flutter/material.dart'; class

问题 I have a Stack in which several widget can be dragged around. In addition, the container that the Stack is in has a GestureDetector to trigger on onTapDown and onTapUp. I want those onTap events only to be triggered when the user taps outside of the widget in the Stack. I've tried the following code: class Gestures extends StatefulWidget { @override State<StatefulWidget> createState() => _GesturesState(); } class _GesturesState extends State<Gestures> { Color background; Offset pos; @override

问题 I have implemented the Scale gesture for the container. Also, I have added onHorizontalDragUpdate and onVerticalDragUpdate. But when I try to add both, I get an exception saying can't implement both with Scale gesture. Even for Pan gesture, it throws the same exception. Below is my code: import 'package:flutter/material.dart'; import 'package:vector_math/vector_math_64.dart' hide Colors; import 'dart: math' as math; class HomeScreen extends StatefulWidget { @override State<StatefulWidget>

问题 I have implemented the Scale gesture for the container. Also, I have added onHorizontalDragUpdate and onVerticalDragUpdate. But when I try to add both, I get an exception saying can't implement both with Scale gesture. Even for Pan gesture, it throws the same exception. Below is my code: import 'package:flutter/material.dart'; import 'package:vector_math/vector_math_64.dart' hide Colors; import 'dart: math' as math; class HomeScreen extends StatefulWidget { @override State<StatefulWidget>

问题 Has anyone managed to get a UIGestureRecognizer to work on a UIView that is a subview of a UIScrollView? My callbacks never seems to get called. As a simple example, I want to have a paging scrollview and on the third page listen for a tap with a UITapGestureRecognizer. However I can not get it to work. Here's how I would do it: self.scrollView = [[[UIScrollView alloc] initWithFrame:self.view.frame] autorelease]; self.scrollView.pagingEnabled = YES; self.scrollView.contentSize = CGSizeMake

问题 I'm trying to write a game where the user can issue commands by drawing certain patterns with his fingers..for example, if he draws a circle, an 'S' letter, an expiral, etc. I'm already familiar with touch events and I'm capable of reading the coordinates... my problem Is in finding algorithms and information about the recognition of the patterns with some degree of error.... for example, If I'm supposed to detect a circle I should detect it even if the user didn't did a make perfect one. Any

问题 In Google Glass XE16 GestureDetector can detect several gestures like LONG_PRESS, SWIPE_DOWN, THREE_LONG_PRESS, TWO_SWIPE_DOWN , TWO_TAP & SOME OTHER GESTURES. In glass TWO_SWIPE_DOWN is like shortcut option to cancel everything and go to black screen. After that black screen it comes "ok glass" . But I need to override the TWO_SWIPE_DOWN TAP so that user can not go outside the application in this way. I want to show the user specific message in the time of tapping TWO_SWIPE_DOWN. I have code

问题 In Google Glass XE16 GestureDetector can detect several gestures like LONG_PRESS, SWIPE_DOWN, THREE_LONG_PRESS, TWO_SWIPE_DOWN , TWO_TAP & SOME OTHER GESTURES. In glass TWO_SWIPE_DOWN is like shortcut option to cancel everything and go to black screen. After that black screen it comes "ok glass" . But I need to override the TWO_SWIPE_DOWN TAP so that user can not go outside the application in this way. I want to show the user specific message in the time of tapping TWO_SWIPE_DOWN. I have code

问题 I'm using SwipeRefreshLayout in drawer. When I stat scrolling up and down in the listview the gesture should be straight up and down, If the finger moves just a little bit a side without lifting it up, the scroll gesture stops and starts the gesture for open close the drawer. If I'm not using SwipeRefreshLayout, the scroll gesture dose not stops until I lift my finger up. This is the layout: <android.support.v4.widget.SwipeRefreshLayout android:id="@+id/swipe_to_refresh_lisview_container"