KitPlus | Articles

Meeting standards in 3D

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 BSkyB’s “Technical Guidelines for Plano Stereoscopic 3D Programme Content” were published over two years ago programme makers have had specific...

Submitted by Bob Pank#

Published 01 January 2013

The highs and lows of histograms

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. The histogram is a way of showing statistical results as a bar-chart. The range...

Submitted by Kieron Seth#

Published 01 December 2012

Wibbly Wobbly Waveforms

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 u...

Submitted by Bob Pank#

Published 01 November 2012

Pointing out the right colours

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 an...

Submitted by Bob Pank#

Published 01 October 2012

Watch out for dead pixels

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. Defective pixels can appear as unusual...

Submitted by Bob Pank#

Published 01 September 2012

Are you out on the range

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 uncomfor...

Submitted by Will Strauss#

Published 01 May 2012

Light weight 3D side-by-side production

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. The mirror rig arrangement allows two (usually large) cameras to be p...

Submitted by Bob Pank#

Published 01 April 2012

3D Diaries Cameras: more for less

http://www.tv-bay.com/imag/issue062/files/44.htmlCameras: more for less?There is plenty of guidance available about how to shoot ‘good’ stereo 3D and the principles are quite easy to understand. Achieving good results takes good equipment and, maybe, the assistance of a stereographer and even a convergence puller... unless you are using one of thos...

Submitted by Bob Pank#

Published 01 March 2012

Unconvincing conversion?

There have appeared in the last year or two an amazing array of 2D to 3D conversion boxes and software processors. Also nearly every major manufacturer of high end 3D sets has its own proprietary built-in processor allowing the user to view any ordinary TV broadcast or DVD instantly as a 3D rendition. The production of genuine 3D is expensive compa...

Submitted by Bob Pank#

Published 01 March 2012

Headache-free 3D

With over 30 broadcast channels now offering 3D programmes, and cinemas in practically every major town and city equipped to show 3D films, demand for stereoscopic content is increasing rapidly. Display manufacturers are now responding to this growing market with various new technologies intended to improve the viewing experience. A useful show for...

Submitted by Bob Pank#

Published 01 January 2012

3D Five years on

For me, IBC2006 was the beginning of the modern 3D era. At an invitation-only presentation, 3ality’s CEO Steve Schklair described what his company was achieving with S3D. Suddenly it all made sense. With the accuracy of digital shoots and computer technology replacing difficulties and expense of working with film, 3D could now be viable. Unlike the...

Submitted by Bob Pank#

Published 01 December 2011

Capturing a slice of the 3D market

The capture card is an essential bit of hardware glue that connects the professional TV studio world to the IT world of the modern high-performance PC.A bewildering range of models and options are offered. Some features are poorly specified or not even mentioned in the product specs. Where there is analogue to digital conversion going on, you reall...

Submitted by Bob Pank#

Published 01 December 2011

Getting close to the edge?

'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. Figure 1 shows an example of edge violation. A street lamp post is located on the extreme right in the for...

Submitted by Bob Pank#

Published 01 November 2011

Doing 3D by the book

'3D TV and 3D Cinema: Tools and Processes for Creative Stereoscopy' (ISBN: 978-0-240-81461-2) is Bernard Mendiburu’s latest book, published this summer by Focal Press. It follows on from his previous success ('3D Movie Making') which has had several reprints to keep up with demand. Since the first book came out two years ago, the art of 3D media, t...

Submitted by Bob Pank#

Published 01 October 2011

Keeping both eyes on the ball

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. Widescreen high def...

Submitted by Bob Pank#

Published 01 September 2011