Tennis Serve Tracker

中国
开发者
2117497 Ontario Inc.
App ID
分类
体育
价格
免费
最新版本上线日期
2020年04月02日 
App Store打开 
版本记录
更新内容对比
  • 全球最早版本上线日期
    2015-05-14
  • 最新版本
    2.2.1
  • 最新版本上线距今
    1年297天22小时
  • 近1年版本更新次数
    -

版本时间线

T鼠标悬停“更新节点”,查看更新内容。点击“更新节点”可查看更新前后内容对比
版本更新
显示内容
日期
  • -
2021年
10月
26
27
28
29
30
31
11月
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
12月
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
2022年
1月
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

版本记录

  • 版本2.2.1
    2020-04-02
    更新日志

    App re-build with iOS 13.0 SDK to comply with latest App Store requirements.

    截图
    视频
    应用描述

    “Tennis Serve Tracker” measures tennis serve speed using video processing and image recognition technologies. Why is it worth trying it when there are similar apps on market? Because all these apps can be split on 2 categories - first are the ones that do it very, very bad or simply invent measured speed and won’t be mentioned here at all. The others do measure the serve speed, but it’s a lot of manual interactions with setting multiple parameters, like choosing deuce/ad serve type, server height, marking server and ball positions on the standard court image template that has no resemblance to the actual court we see with our eyes. These actions drastically increase an error margin, time and effort required to perform a single serve speed measurement - does it match fast pacing tennis game we all love?
    So how “Tennis Serve Tracker” measures tennis serve speed? The fundamental difference is that it processes every single frame in the video feed and recognizes the court on the image frame. It allows to reconstruct 3D world coordinates of the server and ball from the image coordinates. Application provides constant feedback by highlighting court lines, net and a ball on the screen. Now having the time measurements from the video and ball world coordinates application can calculate your serve speed with a great accuracy, most times way better than a commercial speed gun (see doppler effect cosine factor error)! Visit “Demo Videos” application website page for videos with real time side by side comparison between speed radar gun and the app.
    Final speed display is unlocked by lifetime "Premium" upgrade just for a price of a single tennis balls can. This app is a valuable tool for every tennis player who would like to improve their game and have a great serve!

  • 版本2.1.6
    2016-07-18
    更新日志

    - Added short camera flash just before recognition starts to provide visual feedback to the server;

    - Added recognition delay feature to start service tracking after predefined timeout in settings. Combined with "Burst" mode allows recognitions taken in the loop automatically without user interaction - single person can use the app with a tripod now.

  • 版本2.0.1
    2015-11-18
    更新日志

    - Re-implemented parts of the recognition algorithm to significantly increase successful automatic recognition rate;

    - Added "demo" recognitions into the new app installations;

    - Fixed "Help & FAQ" web links in iOS 9;

    - Multiple bug fixes and application functionality improvements.

  • 版本1.3.7
    2015-09-12
    更新日志

    - Added app screenshots and website videos with real time side by side comparison between speed radar gun and the app;

    - Performance improvements and bug fixes.

  • 版本1.3.6
    2015-07-04
    更新日志

    - Added website videos with real time side by side comparison between speed radar gun and the app;

    - Added automatic video pre-roll to the ball touch court frame in manual recognition when available;

    - Added recognition video file name in video player title.

  • 版本1.3.4
    2015-06-13
    更新日志

    - Tablets support added;

    - Full 1080HD video recording and playback implemented;

    - Subscription is removed;

    - Advertising is removed;

    - Performance improvements and bug fixes.

  • 版本1.2.7
    2015-06-04
    更新日志

    - Tablets support added;

    - Full 1080HD video recording and playback implemented;

    - Performance improvements and bug fixes;

    - Subscription is removed.

  • 预订版本1.0.4
    2015-05-14