Digital Sports
Digital Sports
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Sony SPORTS DIGITAL AM/FM Radio Pulse WALKMAN SRF-M75PM $18.99 |
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New LED Luxury Date Digital Mens Sport Black Watch $0.99 |
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Mini DV DVR Sports Video Camera D005 HD Digital SpyCam $1.49 |
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Unique Blue LED Digital Mens Watch White Ladys Sports $8.19 |
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White RED LED Digital Date Sports Mens Ladys Watch NEW $0.99 |
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Military Mens Alarm Date LCD Digital Sport Analog Watch $12.75 |
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NEW MEN MILITARY ROYALE GREEN SPORT DIGITAL ARMY WATCH $9.92 |
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Dual Display Digital Alarm Light Men’s Sport Watch Red $1.49 |
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New Digital Wind Speed Gauge / Wind Sport Anemometer $9.99 |
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New Dual Time LCD Alarm Sport Digital Mens Wrist Watch $0.99 |
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New Date Alarm Digital Mens Amazing Sport Cool Watch $13.66 |
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Casio ANALOG & DIGITAL SPORTS WATCH BLK BAND AW80V-1BV $29.00 |
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New Pink Lady/Girl Date/Day Digital Alarm Sport Watch $0.95 |
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Waterproof Nightvision Light Men Digital Sport Watch Nr $0.01 |
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NEW Digital Sport Digital Mens Wrist Watch RED LED $1.49 |
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Dual Display Digital Alarm Light Men’s Sport Watch Red $1.49 |
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Ohsen New Black Dual Analog Digital Alarm Sport Watch $0.99 |
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NEW MEN MOUNTAIN SKI SNOWBOARD DIGITAL SPORT WATCH $9.99 |
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Analog Digital Dual Time Chronograph Men’s Sport Watch $0.01 |
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WATER RESISTANT DIGITAL FLASHLIGHT SPORT WATCH OHSEN US $0.01 |
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LCD Digital & Analog Quartz Wrist Watch Sport Men Mens $0.99 |
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New LED Light Digital Date Sport Style Lady Men Watch $0.01 |
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Mens Sport Diver Watch Red Quartz Digital Analog OHSEN $0.01 |
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Casio ANALOG & DIGITAL SPORT ILLUMINATOR WATCH AW81-7AV $27.99 |
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LCD Display Pinkish Sports Digital Removable Band Watch $9.12 |
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New Digital Wind Speed Gauge / Wind Sport Anemometer $9.99 |
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COOL RED LED Display Sport Digital Alarm Mens Watch $9.10 |
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Mini DV DVR Sports Video Camera D005 HD Digital SpyCam $1.49 |
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Black Digital Day Date Sport Wrist Watch Steel Yellow T $0.01 |
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AO Safety 90541 WorkTunes AM/FM Hearing Protector with Digital Tuning and MP3 Input $46.95 Listen to music instead of your power tools! The built-in AM/FM tuner in these comfortable headphones now features an easy-to-read LCD display, seek/scan tuning buttons, a low-battery indicator, and the ability to pre-set up to ten different stations. Everything is designed for convenient radio browsing. For even more options, use the stereo input jack (cord included) to connect your iPod or other… |
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SportDOG Rechargeable NoBark 10R Bark Control Collar $119.99 The SportDOG Waterproof Rechargeable Bark Control Collar lets you customize the type of bark control that words best for your dog. Features 10 levels of correction including temperament learning and progressive correction of user-selected correction modes. The PerfectBark technology provides firm, fair and consistent bark control, eliminating false corrections by requiring BOTH vibration AND sound… |
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Omega J8006 Nutrition Center Commercial Masticating Juicer, Black and Chrome $257.99 “Masticating-style” juice extractor for greater variety and nutrition. Turn nuts to nut butter, extrude pasta, grind coffee and spices, mince herbs, make baby food and whip up soy milk and wheatgrass in a flash. No clogging, foaming or heat build up.Features:Dual-stage juicing system for maximum efficiencyEasy to use and cleanLow-speed 80 RPMsExclusive Underwriters Laboratories Inc. (UL) Household… |
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Brazilian Jiu Jitsu- Ultimate winning techniques $8.93 This 2 DVD set presents the most effective fighting systems that really work in uncertain environments and on hard surfaces. Instructed by the leading American author of Brazilian Jiu-Jitsu books and internationally recognized instructor Gene Simco who uses his expertise and years of experience in multiple martial arts disciplines to help both beginners and advanced students regardless of style an… |
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Sporty Baby:Golf $9.66 Move over Tiger Woods! Sportybaby “Golf” introduces the world of Golf to your child by showing repetitive motions of professional swinging, chipping and putting, as well as other important aspects of the sport. Our animated Sporty Mascot™, Turner the Tiger™, leads the way into an adventure on a beautiful real golf course backdrop focusing on the nature and surroundings found there. Real … |
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Baby Basketball $9.77 A Playful Introduction to Sports (Ages 0-4) Introduce your babies and toddlers to the wonderful world of sports with these fun athletic-themed videos. Involvement in team sports can help build confidence, improve social skills and lead to a lifetime of physical fitness. Choose from Baseball, Soccer, Basketball, Football and Golf…. |
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Rocky 5 [VHS] $1.76 The “Italian Stallion” rediscovers his roots in this exciting, thrill-packed drama that reunites Sylvester Stallone with the Oscar(r)-winning* director of the original Rocky(r). Upon returning home from his latest triumph, Rocky Balboa (Stallone) learns that all his money has been lost by an unscrupulous financial advisor. To make matters worse, his fight-relatedinjuries force his retirement from… |
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Rocky 3 [VHS] $0.99 Rocky must cope with the realities of his success, wealth and the responsibilities of marriage, but his main focus is on his second shot at the boxing title against Apollo Creed.Genre: Feature Film-Action/AdventureRating: PGRelease Date: 8-FEB-2005Media Type: DVD… |
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Kid Galahad [VHS] $0.39 Elvis Presley tries on boxing gloves for Kid Galahad, one of his post-Army pictures that still has some fresh air and innocence in it. First spotted crooning from the back of a pickup truck, Elvis plays an ex-G.I. newly returned to his foresty birthplace, where shifty Gig Young runs a boxing camp. Naturally the kid turns out to have talent with the gloves, and a gamblers/mobsters/boxing formula so… |
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Fenix LD 20 6 Level High Performance Cree LED Flashlight, Black, 6- Inch, Maximum 180 Lumens $50.50 ATTRIBUTES No Bulb: LED Burn Time: 2/5/13/71 Hours Carry System: Lanyard Holster Finish: Olive Green Material: T6 Aircraft Grade Aluminum Output (lumens): 180/94/47/9 Overall Length (inches): 5.90 Power Source: AA x 2 Special Features: Glass Lens Digitally Regulated Submersible: Yes to IPX-8 Standards Switch: Tail Cap On/Off/SOS/Strobe… |
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Victorinox Swiss Army Champion Plus Pocket Knife $29.95 From the renowned company that created the Swiss Army Knife a century ago comes the Champion Plus, a complete set of tools for campers, hikers, hunters, fishers, picnic enthusiasts, and people all trades–all neatly contained in a single implement. Measuring just 3-1/2 inches long, the Champion Plus is stylishly cased in the famous red Swiss Army body that’s recognized around the world. More impor… |
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Xanadu – Magical Musical Edition (With Complete Soundtrack CD) $9.99 Studio: Uni Dist Corp. (mca) Release Date: 06/24/2008 Run time: 96 minutes Rating: Pg… |
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Jari Love: Get Ripped 4-Pack, Includes Get Ripped, Ripped to the Core, Ripped 1000, Slim & Lean $19.96 Studio: Razor Digital Ent Release Date: 01/15/2008 Run time: 246 minutes… |
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Billabong Odyssey $6.65 No Description Available.Genre: Sports HighlightsRating: NRRelease Date: 20-APR-2004Media Type: DVD… |
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Omron HJ-112 Digital Pocket Pedometer $20.95 An advanced technology pedometer that can be carried in your pocket, bag or be attached to your beltCounts every step, remembers 7 days of information, has a clock, separately counts aerobic steps, measures distance and calories burned.Unique Dual Sensortechnology lets you carry it discreetly:pocketbagbeltLarge display, resets itself at midnight so it’s ready to go every morning.Clock, shows time … |
Video Analysis Of Sports – The Camera Specs
Planning to pick up a new DV camera that can be used to film the kids and your Tennis serve too? Then getting the right camera is important to help you obtain excellent sports analysis footage and make your video analysis of sports performance clearer. We have picked out some of the most important camera specifications for sports analysis and listed them in this article.
Speed and Size
Like most sports, a good sports analysis camera needs speed and size. There are a few different speed and size measures of a camera and they are discussed below.
Frame Speed
Most off the shelf DV cameras have a standard frame speed of 30 frames per second or fps(NTSC) in the North America and 25 fps (PAL) in most of the rest of world. What this means is that the camera records 30 pictures every second, one picture every 0.03333 seconds. 30 frames per second is the speed at which most regular television is recorded and viewed. When these 30 frames are played back at full speed every second, our brain is unable to distinguish between the individual pictures and we see a flowing video.
However, if we want to analyze a tennis serve then we need to slow down our video and look at each one of these 30 frames of every second and this is where a problem may arise. As the serve is generally a quick motion, we will probably find that if we only record 30 fps then the arm will look like a blur during the serve motion and we will be unable to analyze it properly. To solve this problem we can record the motion at a higher frame rate, say 60 fps and get double the amount of pictures every second. This will give us more data to analyze and reduce the possibility that the motion will be blurred.
In general the more frames we can capture per second the better our analysis can be. Luckily though there is a limit. In most sports when analyzing the human body movement 250 fps is sufficient. If we then want to include say the golf club or tennis racket and analyze its movement, we once again need higher speeds maybe up to 500 fps.
Unfortunately though there are very few off the shelf, commercial cameras that can record high frame rates. You can find some cameras that can record 60 fps, but if you want to go higher, costs can increase substantially. We think a 60fps camera is a perfect start for doing your own analysis.
Shutter Speed
We can get away with the usual 30 fps as long as we have a high shutter speed. Shutter speed determines exposure time, or how long the cameras sensor is open to receive light and therefore record the frame. In sports analysis the higher the shutter speed the less blurred our image will be. However there is a trade off – a faster shutter speed will allow less light onto the cameras sensor and therefore if we use a high shutter speed we need to make sure that we have sufficient lighting as we discussed in the last blog. When looking at a camera for sports analysis, look at the shutter speed and whether it is manually adjustable. A camera that automatically adjusts its shutter speed to the lighting conditions can make you forget the importance of ensuring good lighting on your subject.
Resolution
We all know about resolution from high def televisions. High def television can only display those high definition images if they were recorded by a high definition video camera. The resolution of a video camera is a measure of how many pixels our camera sensor has. Luckily for us most video camera manufacturers are now making HD cameras with about 1920×1080 pixels or 2.3 Mega pixels. Of course a higher resolution is always better just like it is on our TVs.
Lens Choice
There are 2 important aspects of a lens for sports performance capture, aperture (f-stop) and focal length and optical zoom.
Aperture
The aperture or f-stop is a measure of the amount of light the lens of the camera will allow through. A lower number will allow more light into the camera and a higher number less light. Most DV cameras have f-stops as low as 2.5 which is good enough for sports analysis purposes. Once again just like with shutter speed there is a trade off. A lower f-stop can often result in a lower resolution image. This does not mean that the cameras sensor has less resolution but that there is a trade off with lighting and quality. Once again this points to making sure you have a good light source for your recordings. With a good light source you can use a lower f-stop and therefore obtain a better resolution image.
Focal Length
The focal length is the distance from the lens to the camera’s sensor. A smaller focal length means that the camera will capture a wider angle of view and see more in the frame, while a large focal length allows the camera to see more details further away. Focal length and optical zoom therefore are linked. Optical zoom of course allows us to zoom in or away from an athlete.
Most DV cameras come equipped with optical zoom and will read something like 49-735mm, which is the range of focal lengths that can be achieved with this camera.
The more optical zoom we have the further away we can be while still recording excellent footage for analysis. Now its up to us to use that optical zoom effectively by positioning our athlete correctly in the field of view. Check out http://videosportsanalysis.blogspot.com/ for details.
Also don’t get tricked by digital zoom. Digital zoom is not our friend and if used can reduce our actual sensor resolution considerably. It is far better to reposition our camera closer to the athlete than make use of digital zoom.
We hope these tips help if you are looking to choose a new DV camera for sports analysis. Remember though, any camera can work; but if you want more detail you need to ensure that you recorded the detail with your camera. You cannot analyze details you do not have.
About the Author
Dudley Tabakin is Co-Founder of Sadaka, LLC http://videosportsanalysis.blogspot.com, a motion capture and biomechanics consultancy. Clients include FootJoy, Titleist, Warrior Hockey, Vicon Motion Systems, Innovision Systems Inc. and other Sports and Motion capture and biomechanics software companies