Articles
Meeting standards in 3D
N/A It has been said that poor quality stereoscopic TV will poison the water for everyone. This was because in the past 3D was made to quite poor and uncontrolled production and delivery standards. But since BSkyBs Technical Guidelines for Plano Stereoscopic 3D Programme Content were published over two years ago programme makers have had specific quality limits to meet.
Tags: iss072 | 3d | del-soft | cel-scope 3d | N/A
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The highs and lows of histograms
N/A Histogram displays for video analysis probably followed those found in common computer graphics programs such as Adobe Photoshop. This can be very useful in finding video signal problems that would be difficult or impossible to see with a conventional waveform display.
Tags: iss071 | cel-soft | histogram | cel-scope | rell-check solo | N/A
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Wibbly Wobbly Waveforms
N/A The very first analytical electronic instrument, developed in the late 1890s, was the oscilloscope. This used a cathode ray tube (CRT) to paint a graph of voltage on the Y axis versus time on the X axis. Once television became a practical reality in the 1930s, the same instrument was applied to the video output from the camera and became the very useful waveform monitor.
Tags: iss070 | cel-soft | cel-scope3d | waveform | monitoring | vectorscope | N/A
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Pointing out the right colours
N/A In the old days of PAL and NTSC analogue television, a vectorscope was an essential tool for examining chroma at every part for the programme production and transmission chain. This was because the colour information was carried as a phase and amplitude modulation which could be sensitive to a variety of transmission or recording non-linearities and problems. These could cause colour degradation or be completely wrong. In the digital age, colour information is carried in digits which do not usually get corrupted at each regeneration or link. So why would you want to look the chroma (colour information), portrayed on the same analogue style instrument?
Tags: iss069 | cel-soft | cel-scope 3d | celsoft | celscope | vectorscope | N/A
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Watch out for dead pixels
N/A A dead pixel in a camera imaging sensor can manifest itself in a number of ways. Implying black, 'dead' is not necessarily the correct term for a pixel failure. This is because imager defects include hot pixels, sparkles, noisy or lazy pixels. These problems usually arise during the chip manufacturing process.
Tags: iss068 | dead pixels | cel-soft | Pixelfantastic | reel-check | soloqc | cel-scope3d | N/A
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Are you out on the range
N/A The main parameters to worry about in any stereoscopic scene are the most negative and positive disparity values. These numbers are usually expressed in percentage terms rather than in actual screen pixels. The distance between the numbers is the depth range. The depth budget is the maximum value this range can be allowed without being too uncomfortable for the viewer.
Tags: iss064 | bskyb | cel-scope 3d | 3d production | cel-soft | N/A
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Light weight 3D side-by-side production
N/A Whenever you see a typical publicity picture of a 3D production shoot, it invariably includes a very bulky and expensive-looking mirror rig. This can look daunting for the new initiate coming into 3D production and is not the sort of kit you might not want to risk using outdoors.
Tags: iss063 | cel-soft | 3d | toshiba ik-hd1 | cel-scope3d | N/A
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Headache-free 3D
N/A Whatever display technology is used to deliver the 3D images, it is obviously important not to send viewers home with a headache, particularly before they have actually invested in a 3D system of their own. It helps a lot if 3D programme producers understand what causes such headaches because only then can they take effective measures to avoid them.
Tags: iss060 | 3d diaires | cel-soft | cel-scope3d | stereoscopic signal analyser | N/A
Contributing Author N/A Click to read
Getting close to the edge?
N/A 'Edge Violation A visual artifact that can arise when part of an object near the edge of the display is represented in the left-eye image but is not represented in the right-eye image or vice versa.' So says the 3D glossary given by 3D@Home.
Tags: edge violation | 3d | cel-scope3d | iss058 | N/A
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Keeping both eyes on the ball
N/A It goes without saying that spectator sports are made for television; of course they are, as can easily be proved by trying to follow a football match on radio. A skilled radio commentator can describe key aspects of the action fairly well but television actually gives viewers the impression that they are sitting in the stadium.
Tags: 3d | iss056 | cel-soft | cel-scope | N/A
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On the level
N/A In shooting 3D you naturally have two cameras and two lenses: albeit, there are some weird and wonderful single lens/single sensor contraptions out there. This usually means there are any number of ways each camera lens combination could be producing images with minor are major signal level differences. If these level differences are not dealt with on-set or in post-production, they could lead the visually objectionable artefacts in 3D portrayal.
Tags: 3d | iss054 | camera filters | dual stream | monitoring | test and measurement | cel-scope | cel-soft | N/A
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BVE 2011 retrospect
N/A BVE 2011 had much of the buoyancy and buzz of an IBC. The organisers claimed an attendance of over 15,500 visitors and 240 exhibiting companies. Many of the UK-based stalwarts who make the annual pilgrimage to Amsterdam could be seen exploring the show, confirming that BVE is now taken seriously by mainstream broadcasters.
Tags: iss051 | bve2011 | show review | aspen media | atg broadcast | cel-scope | dolby | evs | eyeheight | gekko | holdan | marquis | newtek | pag | polecam | pyser-sgi | teranex | bve north | N/A
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One Eyed 3D
N/A The illusion of a single 3D image is created within the brain based on the spacial displacement of our two eyes. So how can you make a 3D production with one camera?
Tags: 3d | frame animation | iss051 | 3d rig | cel-scope 3d | N/A
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Eyeballing 3D errors
N/A Standard-issue human eyeballs are very adaptive and clever. Of course its the massively powerful image processing in the visual cortex of the brain that really allows us to resolve 3D images.
Tags: 3d | iss050 | 3d errors | cel-soft | stereographer | cel-scope3d | N/A
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Dont lose the 3D plot
N/A As was mentioned in the sixth article of this series, depth budget is the single most important parameter in stereoscopic 3D TV. As well as observing the practical and desirable limits to which the depth parameters can be pushed, making a good 3D production required careful management of depth dynamics.
Tags: 3d | iss049 | depth budget | 3d production | cel-scope | N/A
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Anaglyph, old hat but still useful
N/A There are now many technologies for viewing 3D on television or the cinema. The oldest, dating from the 1850s, is the anaglyph glasses. Im sure everyone is familiar with the red and green style of old, though those particular single colours are hardly used these days.
Tags: anaglyph | 3d | iss048 | anaglyph glasses | cel-scope | N/A
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Total Articles: 16 [1-16]