Press either the "Right" or the "Left" button to open the separate images.
|
GUG
Soft Home 3D Gugle Home |
|
| Attention
if you cannot see all the
images on this page you will need to "Refresh" it. Right-click with the mouse button and select"Refresh". |
|
|
Choose a language to translate this page |
Search in 3D Gugle User's guide |
3D Gugle
User's Guide
(Open Stereo Pairs)
>>
Main Dialogue
>>
Anaglyph LAB
>>
Stereo Pairs LAB
To create an Anaglyph, or to manage a Stereo Pair (Crossed (“X”) or Parallel (“P”) format), go to menu option "File/Open Stereo Pairs".
Press either the "Right"
or the "Left"
button to open the separate images.
Alternatively, press "Side by
Side" to open a stereo pair of images with a horizontal arrangement.
When the images are opened two
new buttons appear. These buttons select the task that you wish to perform ... the creation of anaglyphs or stereo pairs.
To load a copy of the screen image use the little gray buttons.
To load an image from the recent file use the little white buttons.
To load an image from Image acquisition
use the button "Acquisition" and then in the menu
select the device.
See also "Image
acquisition" tutorial
Please remember
that:
1) To hide/reveal the controls dialogue-box, click on the image to toggle.
2)
To move the scroll bars you can use the mouse wheel or the keys.
To use these functions select first the scroll bar by clicking with the mouse.
The active keys are the following "A" and "S" which move
one unit, "Z" and
"X" which move by several units while "Home" and "End"
bring the scroll to each extreme.
3) If your image is too big select the
appropriate "Zoom" level in the Zoom list box to reduce the displayed size. The
Zoom control is in the same dialogue.
If you set the Zoom option to
"Window" 3D Gugle automatically fits your image to the main window.
The zoom function is fast and high quality, providing a blur-free view with no retinal-rivalry.
4) To modify an already existing anaglyph, open the same anaglyph twice using
first the "Open Left" button and then the "Open Right" button.
5)To see any others functions not described on
this page, please consult "Common
functionality"
6)To hide the preview screen and the
controls dialogue-box use the standard "minimize"
button.
Pressing the "Go Anaglyph" button opens the "Anaglyph LAB" and a new dialogue-box will appear.
The scroll bars "Red X" and "Red
Y" move the "Shift Colour" either horizontally or vertically.
With the X-slider you can modify the general depth of your anaglyph.
With the Y-slider you can correct vertical errors.
Note
The Shift colour is selected from the RGB components, for example the "Shift Colour" is "Red".
3D Gugle can operate with any of the possible RGB colour combinations. To change the
"Shift Colour" select:
"File/Preference/Set Anaglyph Colours"
The "Zoom X" and "Zoom
Y" scroll bars increase or decrease the "Shift Colour" horizontally or
vertically.
This function is useful in many situations, such as reducing ghosting or tilting perspective
The vertical increase/decrease compensates for height differences when the images are unequal size or suffer
keystoning caused by 'toed-in' cameras.
The Zoom function algorithm is well-developed and precise.
The scroll bar "DeGhs" applies one of 3D Gugle's many deghosting methods.
To complete the deghosting (and for the best results) use the specific LABs from
the menu "Image/DeGhost by Contrast"
or "Image/DeGhost by Histogram".
For further information about
the anaglyph Ghost problem please consult the document "Ghost
and anaglyph"
The scroll bar "Rot" rotates the "Shift Colour" to the left or to the right.
If your original images have a rotation error,it
is best to have previously corrected the error with the specific LAB function "Rotate".
In the "Rotate"
LAB you can specify a precision of 0.01 of a degree and various interpolation
methods.
Pressing the check-box "Swap" switches the two original stereo images, left-for-right.
To complete anaglyph preparation and return to 3D Gugle main menu, press the “OK” button
Your basic images may now be enhanced by using one of 3D Gugle's many specialised features.
For example
"To crop" right-click on the image with the mouse and select "Selection Box",
draw the "Box" and then use the right button to select "Crop".
"To frame" select "Image/Special Functions/Frame Shop"
and use the "deghosting frame",
"To resize, select
"Image/Transform/Resize".
"To write, select "Image/Special Functions/Write", to
create stereoscopic text see "Stereoscopic
text procedure".
"To add a logo or copyright © mark, select "File/Open
Add" and then use the "Box" transparency function.
Other
suggestions
2) To test your anaglyph glasses with your monitor,
see this document: "Testing
anaglyph glasses and monitor".
3) To emphasise image detail or contrast,you can use
"Image/Emboss/Holo Reconstruction" or "Emboss Depth Emphasise".
4) To modify the general depth you can use the Red and Blue
chrominances from the "Luminance"
LAB (Menu "Image")
5) To apply corrective transformations you can use the various 3D Gugle LAB's selected from the menu "Image/Transform" :
"Free
deformation" or "Sphere LAB"
or "Depth LAB", all of these
LAB's also work on a specific RGB colour.
6) To verify the real depth of your anaglyph you can use the "Stereo
Analysis" LAB from the menu "Movie".
7) To retouch or to erase a part of your image you can use the "Paint" LAB from the menu "Image".
8) If your image is intended for the web, or if you
want to send as an Email attachment, you can use the LAB "Jpeg Analysis"
from the menu "File/Preference".
In this LAB it is possible to verify in real time the result of the jpeg
compression and the file dimensions.
The algorithm used for the jpeg compression is high quality but the image dimensions are somewhat restricted.
For thumbnails, select "File/Save
Thumbnail", to set the main parameter of the thumbnail select from the
menu "File/Preference" and then "Set Thumbnail Size".
9) To print the entire anaglyph, or only one part, you can use the "Print"
LAB from the menu "File".
To make a set for the colours printing you can see the method described in the
luminance help: "Anaglyph
printing" and CMYK
print preview.
Top
Pressing the button "Go Stereo Pairs" opens the "Stereo Pairs Lab" and a new dialogue window will appear.
This LAB provides all the functions that you require to create perfect "Stereo Pairs" for free-viewing (crossed or parallel format) or with a stereoscope.
The LAB is not just intended for creating a side-by-side pair, it is also intended for
setting the stereo window and analysing all relevant parameters such as errors of size, position or rotation
The 'StereoLab' dialogue has four sectors.
The first sector, in orange, is associated with the left image.
The next sector, in green, is associated with the right image.
The two gray sectors control the inter-spaces(between the frames)
and the dimensions of the main stereo window.
Adding an interspace between the Left/Right images makes viewing easier and more comfortable .
The first two blocks can move,
resize (zoom) or rotate
the images.
To change the active function, select the corresponding radio button.
If your source images have a rotation error, it
is recommended that you have previously used the specific LAB "Rotate"
(menu "Image/Transform").
In the "Rotate"
LAB you can use a precision of 0.01 degrees and various interpolation
methods.
The button, "Back Colour", is for changing the
colour of the inter-spaces: normally, for stereo use, this colour is black.
By checking the function "Box", a rectangle in each
window will appear.
The rectangle can be moved and resized with the mouse.
The rectangle is of great
help when correcting misalignments and rotation errors.
The “Swap” function swaps images respectively
from left-to-right and right-to-left.
The “Together” function allows you to move the left and right images in unison.
The function is only available when the radio-buttons for both images 'Move' option are selected.
To complete the stereo work press the button “OK”.
Note
Remember to save your images in an uncompressed format such as "*.gna, *.png" or "*.bmp".
"*.gna" is preferred as it employs lossless compression and saves disk space.
Top
Some suggestions
To make good
Stereo Pairs
The most basic requirement is this: "a good stereo image requires good source images."
If you are new to stereo photography, we
recommend that you first read : "To
make a Stereo photo" or "Cha-Cha" for taking a pair of photos freehand with a single camera.
To verify the 'Stereo LAB' actions you need to freeview (crossed or parallel) the monitor or use a stereoscope.
If you do not know anything about freeviewing, read "Cross-eye/
Parallel-eye".
Vertical Alignment
If the image-pair are larger than the screen dimensions, you can view a selected area by using the 'Main Size' horizontal scrollbar.
Use the left and right image horizontal scrollbars to display the same area on each image.
Next, click "Box", (located at the lower-right of controls dialogue).
The outline of a transparent box will appear at top-left and you may click-and-drag it to a distinctive feature in the images.
If necessary, shift one of the images sideways so that both boxes enclose the same region-of-interest.
Use the vertical slider of one of the images to align the same feature vertically in both images.
Image magnification mismatch
Because of differences of focal-length and geometrical distortion, a pair of camera lenses cannot be perfectly matched.
There is often a small difference of magnification between the two images that may be eliminated by selecting the "Zoom" radio-button for one of the images and using the vertical slider to change image-size.
If necessary, select "Zoom - Window" to fit the images to the screen.
Use the horizontal scrollbars to position a distinctive region-of-interest in the displayed window.
Drag and move the "Box" to a suitable location and compare the height of matching features.
If they are different, use the "Zoom" vertical scrollbar to change the size of one of the images.
Select "Move" and use the vertical scrollbar to reposition the altered image within the box.
Repeat until the image sizes are equalised.
Correcting Rotation errors
Detecting and correcting rotation errors is a complex procedure that requires practice and patience.
Two reference points are required, one in the upper part of the image, the other in the lower part.
If necessary, select "Zoom - Window" to fit the images to the screen.
Stretch the alignment-box so that it fits the width and height of the displayed part of the images.
Now, display the images life-size by selecting "Zoom 100% normal".
Position the top-left part of the box over the first distinctive feature and then use the right-image horizontal scrollbar to bring the corresponding feature into alignment.
Scroll the main window (using the vertical scrollbar) until the bottom part of the images are visible.
If a rotation adjustment is required, click on the right image's "Rot" radio-button and rotate using the scrollbar.
If the rotation is greater than 0.25 degrees it will be necessary to recheck vertical alignment and image-size.
Attention
The above is a general method merely described as an example because it is often preferable to apply these operations to the main subject rather than to the entire image.
Only experience will determine what procedure you use.
The Stereo Window
The "Stereo Window" frames your view of the stereoscopic scene and is represented by 3D Gugle's main window.
The term "Stereo Window" is long-established but in the past was something of a hit-or-miss affair.
The arrival of the computer with the 'digital age' made things easier and now 3D Gugle allows you to achieve accurate results quickly and easily.
Certain "Stereo Window" parameters influence the three-dimensional perception of the resultant scene.
The parameters are these:
1) Width differences
Different image-widths produce annoying "retinal rivalry"
This never happens with 3D Gugle because the widths are made identical.
2) Global depth
The position of the scene, with respect to the stereo window, can be altered inwards or outwards by simply using the horizontal scrollbar of one of the images.
If the scene is pushed too far into the window, the result will be uncomfortable.
Unless there are artistic reasons, positioning the scene in front of the window is normally considered undesirable and is termed a
"Window Violation" or "WV".
Below are two examples in cross-eyed format :
|
Behind window |
 |
|
Through window |
 |
2) Interspace (frame)
The interspace is the empty space or frame that horizontally separates the left and right images.
The interspace plays an active role and contributes to the general stereo effect.
If you freeview using the cross-eyed method, as the images become further separated they seem to become smaller and the 3D effect decreases.
Simply use the "Space" control horizontal scrollbar to set the optimum spacing.
It is good practice to use the interspace to enhance the 3D effect of your image and not just for decorative colouring.
In 3D Gugle's "Frame Shop" LAB
it is possible to vary the frames interspace and see the effect, in stereo, in real time.
To improve your Stereo image
1) To emphasise image detail, use the filter "Image/Sharpen".
2) To give more 'body' and 3D to the subject, you can use
"Image/Emboss/Holo Reconstruction" or "Emboss Depth Emphasise".
3) To manual modify the depth of single details use the 3D conversion LAB "2D to 3D/Direct Stereo Pairs".
4) To apply corrective transformations you can use the various 3D Gugle LAB's selected from the menu "Image/Transform" :
"Free
deformation" or "Sphere LAB"
or "Depth LAB", all of these
LAB's also work on a specific RGB colour.
5) To verify the real depth of your anaglyph you can use the "Stereo
Analysis" LAB from the menu "Movie".
6)To retouch or to erase a part of your image you can use the "Paint" LAB from the menu "Image".
7) To frame and to use the special deghost-frame, select "Image/Special Functions/Frame Shop".
8) To resize select Image/transform/Resize".
9)To write, select "Image/Special Functions/Write", to
create stereoscopic text see "Stereoscopic
text procedure".
10) To add a logo or copyright © mark, select "File/Open
Add" and then use the "Box" transparency function.
11) To balance the colour intensity use the function "left\Right Equality" .
12) If your image is intended for the web, or if you
want to send as an Email attachment, you can use the LAB "Jpeg Analysis"
from the menu "File/Preference".
In this LAB it is possible to verify in real time the result of the jpeg
compression and the file dimensions.
The algorithm used for the jpeg compression is high quality but the image dimensions are somewhat restricted.
For thumbnails, select "File/Save
Thubnail", to set the main parameter of the thumbnail select from the
menu "File/Preference" and then "Set Thumbnail Size".
13) To print the entire image, or only one part, you can use the "Print" LAB from the menu "File".