A flat ordinary image with no depth information. Example: a normal photograph.
An image containing depth information which can be extracted by the human brain as the image is arranged to isolate
Left-eye, Right-eye information by one of a series of methods: lenticular screen, hologram, anaglyph, cross-eyed,
parallel-eyed, stereogram, ChromaDepth.
2D to 3D Process
The method of converting a single flat 2D image into a 3D image - normally by creating the non-existent depth information
and adding it to the 2D image. Several methods can be employed: grey-scale depth map, shifting red/cyan channel
The process of align the image data strips with the micro-lenses in the Lenticular Screen.
A series of fine lines printed around the border of your image to assist in aligning the Lenticular Screen
to the final Interlaced Image.
Viewer can perceive depth without artificial aid like 3D glasses or Lenticular Screen.
An autostereoscopic image, for example a cross-eyed 3D pair of images.
Banding may be commonly caused in an image by partially blocked inkjets. If Banding appears in your Lenticular
Image only when viewed under the Lenticular Screen, it is caused by incorrect Interpolation either when sizing
your images with your image editor or when setting the Print Parameters in PhotoProjector. Try
'Bilinear Interpolation' to avoid banding issues!
The right Interpolation setting to use is 'Bilinear' and not 'By neighbor' if you wish to avoid banding! Also see
Two eyed vision. Human being have binocular vision. The brain perceives depth information by comparing the image
in the left eye with the image from the right.
Ghosting in a 3D or Flip image caused by the right and left eyes seeing information in the image aimed at the other
eye. Both eyes see left and right channel information instead of each channel being isolated for the left or the
right eye. If cross-talk or ghosting is severe, the 3D, Flip, or animation effect is reduced or breaks down completely.
The human brain uses several cues to perceive depth (3D) information. The strongest one is binocular vision but
we also use light-level - where things further away become less distinct and hazy, size - where objects loser to
us appear larger, perspective - where objects appear to recede along lines converging to a vanishing point, and
shadows - both their perspectives and intensity.
Flat 3D or Cardboarding
A process where images are cut and put into layers for 3D or Flip image creation. Each flat picture is seen in
the final image at a different depth but because there is no depth information in each flat image, the overall
effect is like looking at cardboard cutouts. Not true Stereo-3D!
The point or position where a lens can accurately focus all the parallel rays of light.
The distance between a lens and the focal point for that lens.
The human brain automatically fuses information from Left and Right channels (eyes) and creates depth
information from the parallax. When we create 3D, we fool the brain into recreating the depth information.
The bigger the parallax, (distance between left and right views in a 3D image) the greater the 3D effect. Every
person will have different parallax limitations so if we increase the parallax too much - thus making a hyperstereo
effect too much stereo - some people will be unable to fuse the information together in their brain to see
a 3D image!
Image Resolution and Printer Resolution
Printed Images are made up of tiny points of colour. The resolution of the image defines the amount of data (dots)
used to describe the image. The more dots used (if kept to the same micro-size) - the higher the definition and
accuracy of the image. The Image resolution is quoted as Dots Per Inch (DPI) and images used on your computer will
normally range from 72DPI (for viewing on a computer monitor) up to 4880DPI for printing on a high-end printer.
Typical values for images are 300dpi, 600dpi, 1200 dpi or 360dpi, 720dpi, 1440dpi.
More dots can be given to an image by increasing its size but this is only making the dots bigger and does not
impart any addition resolution to an image.
Printers for home and semi-professional use are normally ink-jet printers (best for photographic images) and their
DPI printing resolution varies according to the price, brand, and cost of the printer.
Epson Printers use a print resolution defined in multiples of 360dpi, thus their printers have resolutions of 360,
720,1440, 2880, DPI etc.,
Canon, HP, and Lexmark printers use a print resolution defined in multiples of 300dpi, thus their printers have
resolutions of 300, 600, 1200, 2400, 4800 DPI etc.,
The Printer resolution is across the page and the vertical resolution is typically 50% of the horizontal resolution.
Interlacing (sometimes referred to as weaving)
The process (normally done by a computer and interlacing software) of combining a series of images into a single
image for printing and viewing under a Lenticular Screen. Each image in the series is scanned by the software and
strips of image data are taken from each image and 'laced' together to form a final image. The strips of image
data are arranged so they align precisely with the Lenticular Lenses in the Lenticular Screen. PhotoProjector is
an interlacing software program.
Interpolation (sometimes called resampling) is an imaging method to increase (or decrease) the number of pixels
in a digital image. Virtually all image editing software supports one or more methods of interpolation. How smoothly
images are enlarged without introducing jaggies depends on the sophistication of the algorithm.
Common Interpolation methods are: by neighbor, bicubic, bilinear!
Key Plane or Zero Parallax Plane
The point or layer in a 3D image where no depth is perceived because both the left and right eye receive the same
information. Try holding your hand in front of your eyes about 6 inches away. Shut left-eye, open it, shut right-eye
open it and keep repeating whilst moving hand slowly forward or backward. The point where no change in the viewing
of your hand is perceived by left or right eye is the zero parallax plane or 'key plane' for your eye parallax.