Saturday, December 7, 2013

Which smartphone should i buy?

sports video analysis camera
 on Digital High Speed Video Cameras for Slow Motion Analysis - SportsCam
sports video analysis camera image



ariane


I reaserched between the sony xperia c & samsung galaxy grand. I found out that the xperia has a 0.3 mp front cam wheras the grand has a 2mp front cam.The xperia has a 4gb memory whereas the grand has 8gb. I dont have budget prblms but which one do you think is better? Please help!


Answer
Sony has given the Xperia C its signature design aesthetic with its well defined rectangular shape, barely there curves and its premium build quality. The handset is slimmer, sleeker and lighter than its competitor and thus more portable.

The Galaxy Grand Duos looks like a typical Samsung handset with its curved edges, large body and plasticy casing. Though not as light and portable as the Xperia C, the handset is convenient to hold and use.

Display
The Xperia C packs in a 5-inch TFT qHD display that comes with a resolution of 960 x 540 pixels and a pixel density of 220ppi. The screen is clear and quite sharp, and its size makes it ideal for communication and entertainment on the go.

The Galaxy Grand Duos sports a 5-inch TFT LCD screen with a resolution of 480 x 800 pixels and a pixel density of 187ppi. Its size makes it useable for media and entertainment and its screen is clear and easy on the eyes, though it lacks the sharpness of its competitor.

Sony wins the display round with its sharper display.

Camera


The Xperia C comes with an 8-megapixel rear camera with LED Flash, Exmor R sensor which allows user to capture images in challenging light conditions. In addition the phone is also capable of shooting videos in full-HD (1080p) mode. The camera comes with features like face detection and Sweep Panorama. The phone also sports a 0.3-megapixel front camera. Also, the phone body comes with a dedicated camera button that lets you access it in a jiffy.

Samsung Galaxy Grand also has a 8 MP primary camerathat comes with an LED flash and a very powerful BSI sensor. The smartphone comes with features such as geo-tagging, touch focus, face and smile detection and image stabilization. The camera allows HD filming at 30 frames per second. The phone has a 2 MP secondary camera. The primary or the rear camera comes equipped with picture modes catering to user requirements. The user can also adjust the brightness of the shooter to take clearer and brighter images with the camera even in dull indoor conditions. Some great camera modes in the camera include the Burst, Smile and Panorama. The Panorama mode provides a maximum angle 180 degree for the panorama pictures.

The analysis suggests that the Xperia C fares better in terms of having a quad-core processor, powerful battery and better resolution. On the other hand, Samsung scores in terms of storage capacity and better front facing camera.

video camera suggestions for action movies?

Q. Hi, I am searching for good videocamera that got 1080p and high-speed so there won't be any motionblur. So I was looking at the HR-115CX and wondering if it is any good? come with more suggestions if you know wanother good one. (It HAS to be atleast 60FPS so I can make slow motion ffects)


Answer
you won't like what i have to say, but it is based on experience.

first motion blur has nothing to do with the frame rate. almost every CCD video camera ever made has independent shutter speed ranging from 1/100 to 1/1000 second. the only limitation on shutter speed is available light, but normal daylight will allow for a pretty fast shutter.

second is the fact that ALL digital video except for miniDV uses "Group of Frames" architecture. Only movie cameras and miniDV take video as successive frames, making accurate slo motion analysis possible. The most common HD codec, AVCHD uses a fixed GOF of eight. That means an effective frame rate of 4 FPS, the missing frames are guessed at on playback. The interpolation process can be very inaccurate with action sports. i think that is the source of what you are calling motion blur. Going to 60 FPS won't help, you will still have 7 missing frames for each actual one.

third is datarate. the more data, the better the quality. miniDV is 25 Mbps, your camera is 6 Mbps, which wins? if you must go with HD, then HDV is the best solution. It has high datarate and MPEG2 codec which allows for variable GOF to keep up with action.

These are the most essential reasons that professional action sports is almost universally done with miniDV format camcorders.




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