The hardware of the test platform as shown in Fig. 6a is composed of the illumination lighting, image capture devices such as camera, video card, count card and lens, the motion controller and electronic grating ruler etc.
Photographs were then linearised for radiance and calibrated (relative to the grey card) to account for differences in illumination between images [ 30].
The researchers have developed a handheld version similar to a card-scanning device that uses LED illumination and an ordinary camera.
The near visual acuity exams were conducted by senior nursing students from St .Mary's University of Health Sciences, who were members of the eye care team, at a standard distance of 40 cm in outdoor illumination, binocularly, using either the Rosenbaum or LEA near vision card, depending on patient preference and/or literacy level.
The correction of spatial non-uniformity of illumination should be implemented and/or specified using images of a uniform card (normally but not necessarily white) for each spectral band.
The buses were also fitted with extra internal and external mirrors, additional interior and exterior illumination at the rear doors, external loudspeakers, seat belt reminder stickers, security cards similar to the ones used in commercial aviation and booster cushions.
These four cards, among other interpretations, are symbolic of transformation, mysticism, and illumination.
The emergency candles would be collected from under the sink, Mum would crack open a packet of cards, or the Trivial Pursuit box, and in the newly low-lit illumination of our surroundings, we'd eat squares of chocolate and indulge low-tech amusements as if stolen into an unexpected, folksy holiday.
The book, which is bound in red velvet and has two golden clasps, is smaller than a credit card, and includes fifty-two folios, painted front and back with a hundred and thirty-two miniature illuminations drawn from the Bible and the lives of the saints.
Illumination never arrives.
