We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
144
BRITISH KINEMATOGRAPHY
Vol. 18, No. 5
attention, but to present the picture itself in the most attractive light. Considerable experience has convinced us that the advantage of a projected picture surround cannot be secured by any manually operated device, however flexible in lay-out and operation.
3. STEREOSCOPIC PICTURE
Present techniques have not reached the stage where it is possible to present a stereoscopic picture to a large audience without making some compromise between what is desirable and what is possible,4 and for the Telekinema that compromise involves the
light beams being polarised at right angles by Polaroid filters carried on the projectors.
Requirements of Stereoscopy
The requirements for a stereoscopic picture are that the picture should be seen in depth simultaneously by every member of the audience. This effect, either as in nature or accentuated for dramatic emphasis, must be apparent even in the marginal seats. The brightness of the screen should be adequate from all seats and the whole screen should appear equally bright. This requirement provides conditions which help to pro
Fig. 2. Diagram showing Principle of Projected Picture Surround.
audience wearing spectacles. Accepting this limitation as necessary, either two-colour spectacles or polarising spectacles can be chosen, and as the latter enable colour films to be presented they have obvious advantages. The right and left eye pictures can thus be kept separated right up to the eyes of the audience, and the basic remaining problem is to decide on how the two images should be stored on the film and projected. For reasons that will be discussed in a later paper it was decided to use two separate films, necessitating the synchronous operation of two projectors, the
duce the stereoscopic effect, which is really due to many factors. The picture projected to each eye must contain the difference due to its particular angle of view, and be so presented that the angular position of the eyes of the audience changes with the near and far objects in the scene.
As the picture appears on a single static screen the eyes of the audience must be focused on it whatever the apparent position of the object. Due to the limited focal depth and power of acccommodation of the eye, out-of-focus effects are obtained in ordinary life which aid the stereoscopic view; near