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The role of video analysis in self improvement

March 24th, 2009 | Quintic Video Software, Tuition

The commoditization of hardware has put digital movie-making within the grasp of everyone.

Consultancies such as Quintic specialize in capturing action images, and - with a combination of biomechanical knowledge and specifically developed software - clearly show how athletic performance can be optimized and risk of injury minimized.

But specifically how one can use this for best effect is something that not everyone appreciates. Humans have quite slow vision. The human eye can only separate a maximum of ten or twelve images per second. There are even some suggestions amongst scientists that events lasting less than a quarter of a second cannot usually be seen clearly, if at all.

Video cameras create the illusion of motion by ‘tricking’ the human eye. Video cameras play 25 flashing still pictures each second. As the eye cannot separate those pictures, we get the feeling of continuous movement. The use of a video camera is a very effective tool to help you improve sporting technique. Quintic video analysis software enables video capture at 25, 50 and 100fps. At 100fps each still image is 10ms apart, capable of capturing even the fastest of human movement. Add a second video camera, and the benefits of video have just doubled!

More and more athletes, coaches, scientists are using video feedback as a coaching aid. Video can very quickly help athletes to understand the basic fundamentals of a specific movement. Providing athletes with immediate performance feedback via Quintic video software is a very powerful analysis tool… the images are used to assist coaches in their task, as the athlete’s performance can be repeated afterwards and slowed down during critical phases.

“With the assistance of Quintic analysis software I’ve transformed my putting stroke. What you think you are doing, compared to what you are actually doing, can be two totally different things.”
David Howell

By comparing performances of previous movements, or even other athletes, Quintic software enables you to compare video images via the computer screen. Differences between the techniques can be identified (competition vs. training) and this information made available immediately to the athlete. The coach and the athlete can discuss what they see and plan a strategy for improvement, then repeat the process. How the feedback is presented to the athlete when using Quintic is highly dependent upon the skill of the coach or analyst.

By studying your technique in depth, (frame-by-frame), you can start to build a picture of what you’re trying to achieve. Seeing an improvement can boost your confidence. Normally it’s difficult to correct a fault, even if you know what you should be doing. This is because you don’t normally see yourself in action. You can learn a great deal from studying your own technique on video. The benefits of video apply to all levels of performance, from the beginner to the professional golfer.

Some simple tips will greatly enhance the value of your images… There are four basic operations, which can significantly influence the use of cameras and the quality of images:

· zoom
· focus
· iris
· shutter speed

Zoom
During set-up of your camera, it is important to be at right angles, or 90 degrees to the action. The zoom function in the camera changes the picture size and allows you to stand much further back from the action. It is important that the athlete is as large as possible in the camera view. The zoom allows you to have all the details of the performance on the camera, with the view restricted to show only the golfer and nothing else if possible.

Focus
The camera should be set up so that the entire body is contained within each frame. The correct distance between the camera and subject should be recorded, to allow comparisons in the future (Typically 8-10metres). Set the camera to automatic focus. Data collected using Quintic Biomechanics must have a repeatable and consistent set-up protocol. This will ensure the numeric & graphical representation of variables such as speed, distance, acceleration are accurate. Quintic also accounts for any Parallax error values during the calibration of any particular video.

However, if using a panning or moving camera often a manual focus will ensure correct images are recorded. Auto focus constantly checks and focuses based on what is at the centre of the picture. This, though, is not always practical when videotaping athletes. By learning to use manual focus, you can avoid this problem. Manual focus is set for a certain distance (you do not need to know the distance) and anything that distance away from the camera is in focus. This is another reason for you to stand far away from the athlete (and use the zoom function).

A good hint for manual focusing from a long distance is that you zoom in as close as possible, focus your camera using something like the text on an athlete’s clothing and then zoom out to a desired level so that the whole athlete can be seen in the picture. The image stays focused as zoom and focus are independent of each other.

“Quintic Performance Analysis Software provides comprehensive, easy to use, tools to allow me to analyze my full swing, chipping and putting in fine detail, whether I’m on the practice range, indoors or away on Tour.

I am able to immediately synchronize and compare my swing action and tempo, whilst the use of the drawing tools enables me to calculate the speed and acceleration of my club and arms.”
Padraig Harrington

Iris:
The iris is the function in your camera, which allows the light come into the camera through the lens. Many cameras have this only as an auto function and so you may not be able to change it. In any case, auto iris is not such a bad thing as the lighting conditions could change during the session, as happens when clouds go in the front of the sun. If you have a camera with a manual iris option, then you can test out its influence on the picture quality. Obviously, more light (smaller iris number) makes your picture brighter (but can also make it too bright), while closing the iris makes the picture darker.

Shutter Speed:
Shutter speed options are essential for good quality video taping of athletics performance, particularly when the speeds are fast… In a normal situation, the picture is taken over 0.04 seconds (25 pictures in a second). During even that short time, however, an athlete can move a great deal and thus you see a blurred image in your slow motion tape (like TV slow motion repetitions of a tennis ball in a close line call - often you do not really see the ball at all, just a trace of blurred ball images). Shutter speed allows you to reduce the time over which the individual picture is taken. The majority of camcorders today have automatic settings for various filming projects (refer to manufacture’s guidelines). However, the sports setting - typically a picture of a golfer or runner will provide you with the highest shutter speed setting.

Note: That does not allow you to take any more pictures: there are still only 25 / 50 or 100 fps frames per second (as this is pre-determined by the camera and computer software), but each picture is taken over a shorter period of time. A shutter speed of 1/500s means that each picture is taken over a time frame of 0.002s. The down side of increasing the shutter speed is that you need much more light. This is not usually a problem outdoors, and it is recommended to use at least 1/1000s shutter speed for athletics movement if possible, shutter speeds of 1/10,000 can be used for particular sharp and clear images. However, sometimes when filming indoors you need to compromise and use a lower shutter speed. Additional lighting may well be required.

Quintic would recommend you to make a verbal report to the camera after each shot, throw, jump… for example; commenting on the flight, distance, result… Without this information, the subsequent viewing of the tape will not give the best possible information. Finally, remember that the videotapes always rewind slightly at the end of the recording, so be careful not to cut away the end of the performance when you stop the recording. Film a few seconds prior to and after the actual performance. This also makes easier viewing, as there are distinct sequences on the tape.

Ensure that the camera is a 3CCD - CCD stands for Charged Couple Device - it’s the device that colours the pixels (little dots on your screen - comes from the words ‘picture element’). The majority of cameras only have one CCD using a filter to split the colours to RGB (Red Green and Blue). However a 3CCD camera boasts a CCD for each colour, resulting in better picture quality as the colours are more defined and accurate.

For further details please visit www.quintic.com

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GEL Makes its Mark… the Story So Far

March 10th, 2009 | GEL Golf, Putting Biomechanics, Quintic Video Software

It hardly seems possible that it is just two years since GEL Golf launched its first range of groove putters, such has been the huge impact that GEL has made on the fiercely competitive international golf putter market.

Groove Equipment Ltd (GEL) was set up by former Hong Kong amateur representative and now Hong Kong businessman, Alec Pettigrew, based on the strong belief that groove technology is set to revolutionize the putter marketplace.

“In the not too distant future, all putters will use groove technology given the proven benefits of grooves which reduce skid on the ball and gets the ball to start rolling straighter and sooner and therefore ensures more putts are holed,” explains Alec, CEO of GEL Golf.

Alec first came across grooved putters when he witnessed Goosen’s putting display in the 2001 US Open and was intrigued by the South African’s innovative, if obscure, putter.

Goosen it appeared was using one of the first groove-faced putters to appear on Tour, a Yes! model designed by renown putting guru, Harold Swash. The concept of a grooved putter face was created by Swash when he discovered that grooves at a slight angle grip the golf ball better at impact to improve the forward roll of the ball. The angular grooves allow the golf ball to achieve the desired topspin roll in less time and distance than a flat-faced putter, thereby being more effective at preventing the ball from skipping, skidding or spinning sideways.

Convinced by the groove technology, Alec seized the opportunity to distribute Yes! groove putters in Asia, Africa and the Middle East. It wasn’t long before he had created demand that far out-stripped the company’s supply capabilities, so he also took control of global production. Quickly he expanded the men’s range, brought in a ladies range and introduced the distinctive yellow, black and white grips by which the brand is now immediately recognizable.

Yes! putters fast became the second-most played putter on the Asian Tour, and even more telling, first among golfers without a putter contract. Top golfers like KJ Choi, Colin Montgomerie, Nick Faldo and David Howell were all converting to grooved putters. With Yes! sales and profits spiraling skywards the company was in a better position to take its production in-house. Alec made a clean and amicable break from Yes.

Now out on his own and in no doubt about the benefits of grooves in putters, Alec set out to form a new brand of groove putters that he believed would out-perform his rival’s range. It was Alec’s belief that not only could the grooves be improved but there were other technologies that could be incorporated into putters.

And so GEL began operating in Hong Kong in 2006 and its groundbreaking GEL putters, complete with USGA and R&A approval, were launched at the Orlando PGA Merchandise Show in January 2007, closely followed by their European launch in London in March.

The GEL putter range, comprising six models, took the golf trade by storm with their innovative groove technology that boasted inserts of horizontal, multi-layered aluminium grooves for a more responsive feel and enhanced sweet spot. Whilst on the back of feedback from Tour pros GEL has made their putters larger, heavier and more balanced heads, encouraging an even smoother and more rhythmical putting stroke.

Alec ensured that the GEL putters were easily distinguishable by using bright yellow and blue grips for men, and pink and blue grips for women, and electric blue and pink face inserts.

But it was not just the attention-grabbing colourways that made the GEL putters stand out. Independent testing by The Quintic Consultancy on a variety of big name putters (including PING, Titleist, TaylorMade and Odyssey) confirmed GEL as the number one performer.

In July, Alec made his way up to Carnoustie to attend The Open Championship where GEL made its debut on the practice putting green whilst the signing of former Australian Amateur Champion David Gleeson that week gave the innovative GEL Putter its debut appearance in one of golf most prestigious tournaments. That week, the 29-year-old Australian teed off with a GEL Ruby model in his golf bag in the 136th staging of the prestigious Major.

In a momentous week for the brand, GEL also celebrated an agreement reached with Dr Paul Hurrion, one of the world’s leading sports biomechanists and a renown putting coach, to design a second range of putters under the GEL brand.

With over 10 years of research and development in biomechanics and putting, Alec recognized that Paul’s experience would perfectly complement GEL’s groove and insert technology.

At the time, Paul was giving advice to a number of top European Tour and Ryder Cup players and later that week he was personally thanked by Open champion, Padraig Harrington, in his acceptance speech for his contribution to the Irishman’s first Major title.

By September that year, GEL had appointed Caesar Bayliss as its fulltime representative on the Asian Tour with immediate success; GEL quickly became the number three putter on tour and in December was celebrating its first Tour win when American Bryan Saltus won the Johnnie Walker Cambodian Open on the Asian Tour. Having thrown his regular putter into the lake during a practice round, Saltus played the tournament with a GEL Sapphire in his bag and went on to capture his first major tour title. Asian Tour statistics show that Saltus’ putting average prior to Cambodia had been 30.4 per round but using his GEL Putter, his average that week plummeted to 28.5 putts per round.

“My putting has been the winning formula this week. I had a good start with three birdies and my confidence carried on after that. Quite simply, GEL has changed my life,” were the immortal words used by Saltus to explain his win.

By the end of 2007, GEL was pleased to announce that it had generated first year sales of over 12,000 putters. Not bad for a company barely a year old and entering into a fiercely competitive market made up of a number of big brand names.

After a roller-coaster ride for GEL in its debut year, GEL teed off 2008 with the launch of the GEL Paul Hurrion Signature Range at the PGA Show in Orlando.

Shortly afterwards in May GEL recorded its second Tour win at the Shanghai Championship on the Omega China Tour when Taiwan’s Hsu Mong-nam secured the title at the Orient Golf & Country Club using a GEL Jade model (two other players in the top five were also using a GEL Putter). That week GEL secured its position at the top of the putter leaderboard by becoming the number one putter on the China Tour.

GEL has also been making its mark on the opposite side of the world in North America. In early September GEL celebrated its third Tour win when American Tom Stankowski carded a final round 69 thanks to a birdie on the final hole to capture the Canadian Tour Championship in Ontario. Using a GEL Emerald putter, the American finished the tournament 272, 16 under par, to earn himself US$37,600 along with his first Canadian Tour title.

Over on the LPGA Tour, Tracy Hanson, who discovered GEL putters at the PGA Show earlier this year, has placed her confidence in a GEL Paul Hurrion putter when competing on the top ladies tour in the world. Meanwhile a host of other LPGA players have been flirting with GEL putters though constrained by manufacturers’ contracts that prevent them from using them in actual tournaments.

More recently, GEL once again broke new ground when it secured its first European Tour win when American Anthony Kang clinched the Malaysian Open title in February at the Saujana Golf & Country Club in Kuala Lumpur.

“I actually dreamt last night that I won the tournament but I have those sorts of dreams quite often!” said Kang, who had swapped his GEL putter from the original range for a Rego model in the Paul Hurrion Signature Range at the start of the week. “It feels great to have beaten a strong field here - it hasn’t quite sunk in yet but it is an amazing feeling.”

Kang recorded his first victory in eight years and by winning the Malaysian Open, which was co-sanctioned by the Asian Tour, he earned the biggest pay cheque of his career with the first prize of US$333,330.

These developments marked yet more landmarks in the short history of GEL Golf which has quickly set out its stall as one of golf’s most innovative technology manufacturers. Six months into 2008 and GEL confirmed that sales had already increased substantially on 2007, with over 15,000 putters sold worldwide by June – another significant milestone in the history of GEL which reflected the giant leap in terms of the impact that the brand has made in such a short space of time.

As of July 2008, GEL Putters are now available at retail in USA, Canada, Australia, Korea, Holland, Belgium, France, Hong Kong, Singapore, Philippines, Malaysia, Indonesia, Thailand, China, India, Pakistan, Taiwan, Macau and the UK with the number of countries where GEL is available growing all the time.

And in another major development, GEL Golf has Tour representatives on five professional golf tours; namely The European, Canadian, Asian, Japanese and China Tours. All in all, it hasn’t taken long for GEL to get into the groove and make its mark in the world of golf; no doubt just the start of even greater things to come…

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The role of video analysis in self improvement

GEL Makes its Mark… the Story So Far

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