Open Stereo Image...(W)
To increase the size of the File Open dialog, simply drag the bottom-right corner with the mouse left button depressed.
File types directly supported by SPM are GIF, animated GIF, JPS,DAS,BMI,JPG,STJ,BMP,TIF, MPO and PNG.
SPM supports uncompressed and compressed (see below) TIFF files.
The 'Susie' plugin may be used to support the following additional filetypes :-
Windows Metafile (wmf), Sun Rasterfile(ras,rs), PICT(pict,pct) and
- JPS files are JPG-compressed images that normally have the left-eye view on the right and the right-eye view on the left.
The initial VRex specification proposed a four-byte value in the JPG APP3 marker to define stereo format.
Originally, the defined formats were anaglyph, side-by-side, above/below and interleaved (interlaced).
The overwhelming majority of JPS files on the Internet use cross-eyed side-by-side.
However, SPM makes no assumptions and the user should explicitly state the stereo format, including whether parallel or cross-eyed.
- DAS files are SPM's own format that saves the Left and Right images in an uncompressed form together with thumbnails and embedded horizontal and vertical-alignment information.
Image quality is retained and the original may be restored.
- BMI files are interlaced images saved in the uncompressed bitmap format.
- JPG files are compressed images in parallel (left-eye view on left) or cross-eyed (left-eye view on the right) format.
- STJ files are a special format for Japanese 3D mobile phones which are
made by NTT DoCoMo. It is similar to JPS.
- BMP files are uncompressed images in parallel (left-eye view on left) or cross-eyed (left-eye view on the right) format.
- TIF files are uncompressed or compressed (lossless) images in parallel (left-eye view on left) or cross-eyed (left-eye view on the right) format.
SPM will open TIFF files with packbits, LZW or ZIP compression.
- MPO are multiple picture format files, first used with the Fuji Real 3D W1 camera.
They contain two separate JPG images.
- PNG files are losslessly compressed and SPM will open indexed (1, 4 or 8-bit) or 'TrueColor' formats.
- GIF files use Lempel Zev Welch (LZW)compression and are 256 colors or less.
- Animated GIF files are 256 colors or less and SPM treats them as side-by-side even if you enter an incorrect stereo-format.
Although by convention each file-type normally implements the stereo-formats stated above, in SPM it is not a requirement as file-type and stereo-format
are specified separately.
Interlaced JPS for example would be unusual but perfectly acceptable to SPM.
The stereo-image formats supported are Side-by-side, Above/Below, Interlaced, Anaglyph, SIS and Tri-Delta.
Side-by-side format may have the images arranged in parallel or cross-eyed view.
Above/below format may have the Left image on the top or bottom.
Interlaced format may have the left image in the odd or even lines.
Anaglyphs may be monochrome or color.
For Anaglyph(Gray), the left and right views are converted to grayscale.
For Anaglyph(Color), the left/right views are displayed in a special way that makes them easier to use with 'Easy Adjustment'.
After adjustment, you can display them in other anaglyph modes except half-color.
That is because half-color mode uses a grayscale value computed from the RGB values and those values are not available.
This mode is only intended to aid the editing of anaglyphs and not for viewing.
'Tri-Delta' is the name normally given to the 'Prism Stereo' attachment
originally made by Tri-Delta Engineering (New Jersey, USA). Similar attachments
based on mirrors and/or prisms are now available or are often custom-built.
Further information at 'Tri-Delta Prism Stereo Camera Adapter'.
The images may be aligned top-to-top (TT) or bottom-to-bottom (BB). See figures 3 and 4 for examples.
figures 3 Tri-Delta(TT)
figures 4 Tri-Delta(BB)
Obviously, choosing the wrong stereo-format for the selected-image will result in the image being incorrectly displayed.
'Swap Left/Right' may be applied to the stereo-pair.
For example, if your stereo-images are in cross-eyed format and you normally view in Anaglyph mode or use Easy Adjustment (with its anaglyph view) a lot.
'Show Preview' may be checked to show a thumbnail image of a browsed file and information regarding its file-type,image-width and height and color-depth.
SIS is a proprietary format.
'Open as Normal size' may be checked to open the image at its native size.
If the window is smaller than the image, only part of it is displayed and the horizontal and vertical slider-bars are used to navigate the image.