Vr Mapping

ON-LINE REFERENCE DOCUMENTATION

CARDINAL SYSTEMS, LLC

www.cardinalsystems.net

Vr Mosaic

Type: Stand-alone Application (vrmosaic.exe)

 

Mosaicing Application.

 

See also: Tutorial Vr Mosaic

 

Mosaic

 

Overview

VrMosaic Basics

Using VrMosaic

Video Tutorials

Overview

This application creates mosaic images from multiple ortho images. Ortho images may come from any source that outputs TIFF (.tif) images with TIFF world (.tfw) files, such as VrMapping's VrOrtho software.

 

This is a sample workflow to create mosaics from raw photos using VrMapping software.

 

1.  Obtain raw photos in digital form.

2.  Create a new project using VrOrtho. Define project settings and add raw photos to project.

3.  Orient photos by using VrOrtho single photo resection or by importing orientation data.

4.  Define ortho areas using VrOrtho (using default settings or ortho area editor) or the OrthoLayout application in VrOne.

5.  Create ortho images using VrOrtho.

6.  Create a new Project in VrMosaic. Add the ortho images to the project.

7.  Use the VrMosaic application to define seam lines and create final output mosaic images.

VrMosaic Basics

VrMosaic will start by opening the Main Window and one Graphics window.

 

VrMosaic_image002

 

Starting an Application (Command)

Start commands by pulling down a menu and selecting an item. Alternatively, start commands with a key-in using the command name.

 

The Main Window

VrMosaic_image004

 

The Main Window in VrMosaic contains the command pull down menus, a key-in area, two information areas, a progress bar, and the coordinate display.

 

Command names may be entered into the key-in area at almost any time.

 

The active workspace is shown on the border of the Main Window. Workspaces are VrOne-compatible files used to store seam lines and sheet layouts.

 

Using VrMosaic

Overview

“Mosaic” should be the first application used upon starting a new VrMosaic project. "Mosaic" can be started by pulldown menu selection, or by entering the key-in "MOS".

 

The Mosaic application displays several windows:

clip0001

 

1.The Mosaic Steps dialog, which shows the main steps to create a mosaic.
2.The standard MenuKeys dialog, which displays all commands available during the mosaicing process;

NOTE: The Mosaic Steps dialog and the MenuKeys dialog share common commands. Anything that can be selected from the Mosaic Steps dialog can also be selected using the MenuKeys dialog. While the Main Steps dialog only gives a few basic commands and provides the user with a broad overview of the mosaic creation process, the MenuKeys dialog provides all available options at any given time.

3.The VrMosaic status dialog, which displays all images in the current project grouped by strip numbers. This dialog provides a quick view of the mosaicing status and can be used to set images as active or inactive and as complete or incomplete. The Mosaic Status Dialog, One dialog shows the “Main Steps” that will be followed when creating the mosaics. The other dialog is a standard Vr MenuKeys dialog. The Main Steps dialog and the MenuKeys share common commands.
4.The Overview graphics window (shown on the upper left), which displays an overview of the active ortho images. Images in this window are displayed at their true geographic location.
5.The Layout graphics window (shown on the upper right), which displays a simplified view of the active ortho images. Images in this window are not displayed at their true geographic location, but rather separated to avoid overlap.
6.The Main graphics window (shown on the bottom), used for detailed seam line creation and editing.

 

NOTE: The view in all graphics window can be changed using standard VrOne zoom commands such as Zoom All, Page Up, Page Down, etc. There is only one active window at a time, but the cursor (or cursors in layout view)  track in all windows.

 

Local Commands

The following key-in commands are available while the Mosaic application is running.

Key-in

Description

Range

SHOWSTATUS

Shows status dialog.

N/A

SHOWSTEPS

Shows steps dialog.

N/A

SHOWOVERVIEW

Shows overview window.

N/A

SHOWLAYOUT

Shows layout window.

N/A

HOLD=

Image number to hold.

Number of the image to hold when matching images

FEATHER=

Feathering status.

0=Feathering off

1=Feathering on

FEATHERMODE=

Feathering mode.

0=Use project feather width

1=Use Non-Graphics pointer

FEATHERWDT=

Feather width to use if FEATHERMODE=0.

0-255

FEATHERADJONLY=

Feather to adjacent images only?

0=No

1=Yes

FEATHERALLCOLORS=

Specifies whether to feather all colors or to exclude pure black and pure white.

0=Exclude black and white

1=Feather all colors

WRITEPYRA=

Write pyramids as images are created?

0=No

1=Yes

COMP=

Compress output images?

0=No

1=Yes

COMPQUAL=

Compression quality.

0-100

OUTFIL=

Default output file name.

Valid file name

BACKCOLOR=

Background color.

Color value

PYRALEVEL=

Output pyramid level.

0-6

SEGWDT=

Set width of current segment. Only valid during seam placement.

0-255

PARFIL=

Load parameter file.

Valid file name

TYPE=

Output image type.

0=Same as first image

1=RGB

2=Greyscale

SEAMLAY=

Layer for seam lines.

1-10001

BATCHSHEETLAY=

Layer for batch sheet lines.

1-10001

BATCHSHEETNAMELAY=

Layer for batch sheet names.

1-10001

BATCHSHEETPATH=

Path to which to output batch sheets.

Valid path name

PREVEDIT=

Preview mode on during editing?

0=No

1=Yes

PREVMODE=

Preview mode.

0=Clip only

1=Balance only

2=Clip and Balance

SHOWIMGEDGES=

Show image edges during editing?

0=No

1=Yes

IMGEDGESPEN=

Pen number to use when drawing image edges.

0-255

MATCH=

Match images before output?

0=No

1=Yes

HANDLESON=

Display handles during editing?

0=No

1=Yes

TICKSON=

Display ticks during editing?

0=No

1=Yes

HILITEMODE=

Active segment hilite mode during editing.

0=Solid

1=Dashed

HILITEPEN=

Pen to use when hiliting segments during editing.

0-255

OVERLAP=

Overlap amount for image layout.

Integer

SIDELAP=

Sidelap amount for image layout.

Integer

SEPCHAR=

Separator character between image strip and photo number.

0=None

1=Underline

2=Dash

3=Tilde

NUMSTRIPCHARS=

Number of characters in image name for strip number.

1-8

NUMPHOTOCHARS=

Number of characters in image name for photo number.

1-8

MANUALPROMPT=

Provide a prompt for image name and pixel size during manual output?

0=No

1=Yes

Mosaic Application Windows

VrMosaic Main Steps Dialog

 

 

VrMosaic_image008

Main Steps Dialog

 

 

Main steps:

 1. Project Setup

 2. Place Seams

 3. Create Mosaics

1. Define Project

Select "Project Setup" from the main steps dialog or select “7. Enter Params" from the MenuKeys dialog to display the project settings dialog box.

 

VrMosaic_image012

Project Dialog General Tab

Flight direction

Specifies the general angle of flight direction for the project. This is entered in degrees and represents a counterclockwise rotation from N-S or E-W. If the flight was close to N-S or E-W, this can be left at 0. To calculate this value, first determine the cardinal direction closest to the flight angle (either N, S, E or W) then calculate an approximate delta rotation from that cardinal direction. Enter this delta rotation angle as a positive number if the angle from the orthogonal direction to the flight direction is counterclockwise. Enter it as a negative number if the rotation is clockwise.

Seam line file

Defines the file in which to store the seam lines. This is a standard VrOne vector database file. The file is created if it does not already exist. This file may contain any other data that should be available during seam line collection(such as sheet layout lines). However, the layer chosen for “Seam line layer”should not contain any other entities.

Seam line layer

Specifies the the layer for all seam lines. Any automatically generated seam lines go on this layer.

Preview Mode

Specifies the mode to use when previewing mosaic images.

 

Clip Only

Images are clipped at the seam lines. This allows the user to see how the images fit together at the seam lines, but does not show tonal or color changes.

Match Only

Images are matched then displayed with tonal and color changes. This may significantly increase processing time when preview is turned on or when the Edit Seams routine is started.

Clip and Match

Images are clipped and matched as explained above.

Strip – Photo separator character

Mosaic uses image filenames to determine the strip and photo number for each image. This information is important for determining how images relate to each other and for correctly displaying images in the layout window. Select the character that separates the strip number from the photo number in the image filenames.

None

There is no separator between the strip and photo number.

Underbar _

There is an underline bar (_) between the strip and photo number.

Dash -

There is a dash (-) between the strip and photo number.

Tilde ~

There is a tilde (~) between the strip and photo number.

Number of digits for strip number

If there is no separator character between the strip and photo number in the image filenames, then you must specify how many characters occupy the strip number in the filenames.

Number of digits for photo number

If there is no separator character between the strip and photo number in the image filenames, then you must specify how many characters occupy the photo number in the filenames.

Define Images

Displays another dialog to define the images for the project.

VrMosaic_image014

 

"Add…" displays a standard image selection dialog where multiple images may be added to the project. "Remove" removes any highlighted images from the project.

Save Parameters

Saves current parameters to an ASCII file. Displays a file save dialog box and prompts for an output file name. The default file extension is .omp.

Load Parameters

Loads parameters from a previously saved ASCII file. Displays a file open dialog box showing files with the .omp extension.

Reset Parameters

Resets current parameters to default values.

Save As Default

Saves current project settings as the default settings for future projects. The specific images defined in the project are not included in the default settings.

VrMosaic_image016

Project Dialog Seam Editor Tab

Preview during seam editing

Specifies whether to enable image previewing during seam line editing. Uses the current Preview Mode. Enabling makes it possible to edit seam lines and instantly see how the images will fit together at the seam lines.

Show image edges during seam editing

Specifies whether to display image edges as solid lines during seam line editing.

Image edges pen number

Defines pen number to use when drawing image edges during seam line editing.

Seam hiliting pen number

Defines pen number to use when hiliting seam lines during seam line editing. Seam lines are hilited when the cursor moves near them during seam lines editing. Hiliting indicates which seam will be affected by the edit operation.

Seam hiliting mode

Controls how the hiliting is displayed ("Solid" or "Dashed") during seam line editing.

 

VrMosaic_image018

Project Dialog Layout Window Tab

 

VrMosaic_image020

Project Dialog Output Tab

Batch sheet line layer

Specifies layer for all sheet borders. When using the batch output mode, a sheet is determined by looking for closed lines on this layer.

Batch sheet name layer

Specifies layer for all sheet border file names. To assign file names incrementally based on the main output file name, set to 0. To control the file names used when outputting mosaic sheets in batch mode, place the file names (using VrOne text entities) inside each sheet border and set this layer to match the layer of the file name labels.

Batch sheet output path

Specifies path directory into which to place then the output files provided that a batch sheet name layer is defined.

Balance images during output

Determines whether balance adjustments should be applied while the images are written.

Hold image when matching

When creating output mosaics, images are color matched to each other using the image overlap areas. The matching process picks one image to remain unchanged then matches all surrounding images to the unchanged image. Images that actually overlap the hold image are matched first, then images that surround them will be matched. This cycle continues until all images are matched.

Use Feathering

Determines whether feathering should be used along seam lines. If set to "No", feathering is not used.

Feather Width Mode

Specifies method to determine feather width.  "Use specified value" uses the value entered in the "Feather Width" field. "Use non graphics pointer" uses the width of the seam line's non-graphic pointer.

NOTE: The width of individual segments can always be overridden.

Feather Width

Specifies width to use when feathering (in pixels) given that Feather Width Mode is set to "Use specified value". This value is overridden if individual segments are assigned different widths.

Feather adjoining seams only

Specifies whether only image data from adjoining seam lines should be used when feathering. If "No", all image data is used. Allowing all image data is faster but can cause problems with large overlaps.

Feather all pixel colors

Specifies whether to feather all pixel colors. If "No",  pixels that are solid white or solid black are not used when feathering.

Output Image Type

Controls the color mode of the output image.

"Same as first image" - Sets the output mosaic to RGB if the first image is RGB. Sets the output mosaic to grayscale if the first image is grayscale.
"Color" - Sets output mosaics to RGB color. (24-bit) .
"Grayscale" - Sets output mosaics to grayscale (8-bit).

Create image pyramids

Specifies whether image pyramids should be created as the mosaic image is written. This results in slightly longer processing times but eliminates the need for VrOne to create image pyramids the first time the mosaic is opened. If set to "No", old image pyramid files are deleted, but new ones are not created until the mosaic image is opened.

Compress output image

Specifies whether output mosaic images should use JPEG compression. If set to "No", output images will not use compression.  Output images will use this setting regardless of the file format of the input ortho images.

Output compression quality

Determines output image compression through a value from 0 to 100. Lower numbers result in greater compression but more loss of image quality. Higher numbers achieve greater image quality but larger file sizes. A good default value is 70, providing a compression ratio of ~8:1 for color images with a minimal loss of quality.

Output pyramid level

Allows output mosaic images to be written out at a different pixel size than the input ortho images. The output file sizes and image quality decrease by powers of 2 for each higher pyramid level. This is useful for creating composite mosaics of very large areas that would require too much space if written out at full quality (pyramid level 1). It also provides a quick way to create low-res “thumbnail” mosaic images of large areas. When selecting the output pyramid level, the resulting pixel size is displayed for informational purposes only. The pixel size computation is always based in the pixel size of the first opened ortho image in VrOne. The pixel size is read from the TIFF world file (.tfw).

Background pixel color

Specifies the color to apply to background pixels.

Prompt for info during manual output

Determines whether to display a dialog when manual window is selected for image output. This dialog allows default output filename and pyramid level to be overridden.

Output mosaic image file name

Defines the name of the output mosaic image file. This file is overwritten if it already exists. A .tif extension is added to the filename if it is not already specified. When using batch output mode, this name is used as the prefix for all output images.

Advanced Balance Params

This button is only displayed if you have purchased the VrBalance module. Sets advanced parameters that affect the global image balancing process.

VrMosaic_image022

Intensity Adjustment Type

Sets the computation method to use to adjust the image intensity.

Additive mode works best on the widest range of images, but there are some cases where multiplicative may give better results. Multiplicative mode tends to increase image contrast. Only try multiplicative if additive yields poor results.

 

None

Do not apply any intensity adjustment.

Additive

Additive computation mode.

Multiplicative

Multiplicative computation mode

Color Adjustment Type

Sets the computation method to use to adjust the image color.

Additive mode seems to work best on the widest range of images, but there are some cases where multiplicative may give better results. Multiplicative mode tends to increase image contrast. Only try multiplicative if additive yields poor results.

 

None

Do not apply any color adjustment.

Additive

Additive computation mode.

Multiplicative

Multiplicative computation mode

Sample method

Sets the method to use to sample data.

Mean

Use the mean sample method.

Median

Use the median sample method.

Intensity computation level

Sets the computation level to use to compute the intensity adjustment. The medium setting does not fit the data as closely as full. In most cases, full is the best option. For an image with many lakes or other non-matching areas, medium may produce better results.

 

No adjustment

No adjustment is applied to the intensity.

Medium

A medium computation is used.

Full

A full computation is used.

Color computation level

Sets the computation level to use to compute the color adjustment. The medium setting does not fit the data as closely as full. In most cases, full is the best option. For an image with many lakes or other non-matching areas, medium may produce better results.

 

No adjustment

No adjustment is applied to the color.

Medium

A medium computation is used.

Full

A full computation is used.

Samples per image

Sets the number of samples to take from each image. The default value is 200. Increasing this value on very large images may produce better results because it will look at a larger percentage of the image. This has a direct relation with computation speed. A value less than 20 will likely yield unreliable results.

Sample size

Sets the square size of the area looked at for each sample. The default value is 50 (a 50x50 pixel sample).

Margin percentage

Sets how much of the outer image is ignored during processing. For images with areas around the edges with invalid image data (like fiducials), this setting can force those areas to be ignored. A value of 10 would result in the outer 10% of the image being ignored; a value of 0 would result in the full image being considered.

Std. Deviation Filter

Limits the pixels to those that fall around the mean of the sample. For example, the sample were normal and the filter set to 1.0, ~68% of the data (1 standard deviation about the mean in either direction) would be used for the computation. This can help filter out undesirable parts of an image.

0.0 = No filter.

1.0 std = 68% of a normal distribution,

2.0 std = 95% of a normal distribution

3.0 std = 99.7% of a normal distribution)

 

2. Place Seams

Pressing "Place Seams" displays the VrMosaic Place Seam Steps dialog and the Place Seams MenuKeys.

 

VrMosaic_image024

 

VrMosaic_image026

 

Two basic seam types can be used when defining seam lines: open and closed. Open seams place a common line between two images or two strips. Closed seams define polygonal regions that identify areas of image data to be taken from single images. The two methods may be combined on any image. The majority of seam line placement is accomplished using open seams. Closed seams are normally used only to patch image data in specific areas.

 

Placing Open Seams

 

There are three main steps to place open seam lines:

Step 1

First, determine which mode to use to insert the seam line. Seams may be inserted between strips or images. Selecting “Toggle Seam Mode” in the Steps dialog or activating “3. Tog Seam Mode” from the MenuKeys toggles between strip mode and image mode. It is common practice to place the strip-to-strip seam lines before defining the image to image seam lines

NOTE: When in the strip mode, a single line should be placed for the entire length of the strip.

Step 2

Next, identify the images or strips between which that the seam line is to be inserted. Use the mouse or digitizing device to point to images or strips in the Layout window.

 

If in Image mode, pressing the MenuKeys button 1 ("Select Image 1") while pointing to an image causes it to be highlighted and set as Image 1. The next image over on the same strip is automatically highlighted and set as Image 2. Pressing the MenuKeys button 2 ("Select Image 2") while pointing to an image allows Image 2 to be identified manually if the automatic identification was incorrect. Pressing MenuKeys button 2 while pointing to the an already-identified Image 1 removes the selection of Image 2. This is useful for inserting a seam line that defines the edge of a single image without another image beside it.

 

If in Strip mode, pressing the MenuKeys button 1 ("Select Strip 1") while pointing to an image in a strip will cause that strip to be highlighted and set as Strip 1. The next strip over is automatically be highlighted and set as Strip 2. Pressing the MenuKeys button 2 ("Select Strip 2") while pointing to an image in a strip allows Strip 2 to be identified manually if the automatic identification was incorrect. Pressing MenuKeys button 2 button while pointing to an image in the already-identified Strip 1 removes the selection of Strip 2. This is useful for inserting a seam line that defines the edge of a strip without another strip beside it.

Step 3

The third step is to insert the seam line. Selecting “Place Seam”  in the Steps dialog or pressing “4. Place Seam” in the MenuKeys starts the seam placement process.

 

VrMosaic_image028

 

At this point, the main graphics window (Window 1) should be used to digitize points along the seam line. The graphics window can be zoomed in as close as needed while the Overview window can be left at a higher zoom level to monitor where the seam line falls within the overlap area. The images will automatically update as the seam line is placed, showing exactly how the seam line affects the images.

NOTE: When strip-to-strip seam lines are being placed, at first not all of the images in the strip will be visible. The images will appear as needed as the seam line is placed along the strip to strip overlap area.

 

When the seam line is complete, use the “4. End” command to save the seam line. This saves the seam line in the current VrOne file and returns to the Define Seams MenuKeys dialog. VrMosaic automatically selects the next two image or strips and highlights them in the Layout window. If these are the next two images or strips that between which a seam line should be placed, repeat Step 3 and digitize a new seam line. If not, follow steps 1 and 2 as needed to identify the correct images and strips then place the next seam line.

 

Placing Closed (Polygon) Seams

 

Closed seam lines are only assigned to a single image. They are useful for taking individual features from one specific image for use in the mosaic output. There are three main steps to place closed seam lines:

Step 1

Select “8. Polygon Mode” from the Define Seams MenuKeys dialog.

 

VrMosaic_image030

Step 2

Next, identify the image to which to assign the seam line. A default image should already be highlighted in the Layout window. If this is not the correct image, use the mouse or digitizing device to select a different image in the Layout window. The image will be highlighted.

Step 3

Insert the seam line. Select “4 Place Seam” from MenuKeys to start the seam placement process.

VrMosaic_image032

 

At this point, the main graphics window (Window 1) should be used to digitize points along the seam line. The graphics window can be zoomed in as close as needed, while the Overview window can be left at a higher zoom level to monitor where the seam line falls within the image.

 

When the seam line is complete, use the “4. End” command to save the seam line. This saves the seam line in the current VrOne file and returns to the Define Seams MenuKeys dialog. VrMosaic automatically selects the next image and highlights it in the Layout window. If this is the correct image on which to place a seam line, repeat Step 3 and digitize a new seam line. If not, follow step 2 to identify the correct image, then repeat Step 3 to place the next seam line.

 

 

3. Create Mosaics

Press “Create Mosaics” in the Main Steps dialog or select “5. Create Mosaics” from MenuKeys to start the Mosaic creation.

 

VrMosaic_image034

Manual

Choose option “1. Manual” to manually select a single output window.

 

VrMosaic_image036

 

Select the lower left hand corner of the output window.

 

VrMosaic_image038

 

As the cursor is moved, a box representing the output area will display in the graphics window. The VrMosaic main window displays the width, height, pyramid level, and approximate file size of the output image.

VrMosaic_image040

 

Select the upper right hand corner of the output window.

 

If manual prompt mode is disabled, then the following MenuKeys dialog will be displayed.

 

VrMosaic_image042

 

Choose the “1. Accept” option to create a single output image with the name defined in the “Output mosaic image file name” parameter. A “scanline” will be displayed in the graphics window representing the progress as the output image is created.

 

Choose “2. Reject” to return to the “Dig Lower Left” MenuKeys dialog.

 

If manual prompt mode is enabled, then the following dialog will be displayed:

 

VrMosaic_image044

 

At this point, default project settings for Output filename and Pyramid level can be overridden. Press "OK" to create the output image using the filename and pyramid level specified. A “scanline” will be displayed in the graphics window representing the progress as the output image is created.

Batch

Choose “2. Batch” to create multiple mosaic output images in batch mode. This requires an existing sheet layout in the current workspace. The sheet layout consists of closed lines containing text labels that represent the output image names. These sheets may be definee using VrOne or VrMosaic standard commands like Insert Line and Insert Text.

 

The following dialog will be displayed. This lets you know where the Mosaic application will look to find sheet lines and sheet labels. In this case, the parameters were defined such that sheet borders and sheet labels (image names) are both on layer 3.

 

VrMosaic_image046

 

Press "Yes" to find all output sheet borders and names. They are displayed in a dialog.

 

VrMosaic_image048

 

This dialog can be used to select any combination of sheets to output. Sheets that do not exist yet or that exist but have a different pixel size are automatically selected for output.

 

Pressing "Ok" begins the output process. VrMosaic balances the images, applies seam line cuts and feathering, and cuts out images into the provided sheet layout. Depending on the size and number images, this process can take anywhere from several minutes to several hours to run.

Miscellaneous Menu Keys Options

This section documents MenuKey options not included as part of the main Mosaic process documentation.

 

VrMosaic_image050

Main Menu Keys dialog box

 

Place Seams

Displays Place Seam MenuKeys dialog.

Edit Seams

Displays Edit Seam MenuKeys dialog.

Adjust Layout

Displays layout adjustment MenuKeys dialog.

Tog preview

Toggles preview mode on/off. If seam lines have been placed, this whether images are displayed in preview mode (clipped and balanced) or in standard mode (original images).

Create Mosaics

Displays Create Mosaic MenuKeys dialog.

Adjust Images

Displays image adjustment dialog for controlling image brightness and contrast.

Enter Params

Displays project settings dialog.

Rebuild preview

Rebuilds image preview. Some edit operations may result in a state where preview mode does not display the latest changes. This option rebuilds the image previews from the current seam lines.

More Options

Displays the More Options MenuKeys dialog.

 

VrMosaic_image052

Edit Seam Menu Keys dialog box

 

Id Seam

Use mouse button 1 to select an existing seam line to enter single seam editmode

Dynamic Edit

Displays the Dynamic Edit MenuKeys dialog.

 

VrMosaic_image054

Adjust layout Menu Keys dialog box

 

Move Photo

Displays the Move Photo MenuKeys, which allows a single photo to be moved to a new location in the layout window.

Move Strip

Displays the Move Strip MenuKeys, which allows a strip of photos to be moved to a new location in the layout window

Adjust Spacing

Display a dialog that where a horizontal and vertical spacing factor may be entered, allowing the images to be easily spread apart or pulled together.

Reset Layout

Resets the images to their original layout positions.

 

VrMosaic_image056

More Options Menu Keys dialog box

 

Reset Windows

Resets the main Mosaic display windows to default locations.

Show Status

Displays the Mosaic status dialog if it has been closed.

Show Steps

Displays the Mosaic steps dialog if it has been closed.

Show Layout

Displays the Mosaic overview window if it has been closed.

Show Steps

Displays the Mosaic layout window if it has been closed.

Export Seams

Places all seams as closed polygons on a user-defined layer.

Check for Dups

Checks for duplicate seam lines (more than one seam line on the same side of an image). Normally, there is only one seam line representing a particular side of an image. If more than on is found, there is probably a problem with seam line collection.

Edit Seam Props

Allows a single seam line to be selected and edited using a dialog box to change the seam line properties.

Compute Balance

Global image balancing is a two-step process. The first step is computing the balance parameters by comparing all images in the project. The second step is applying the balance adjustments during image output or preview display mode. Normally, the first step is completed automatically the first time balance parameters are needed by VrMosaic. Once balance parameters are computed, they are not computed again unless the list of images in the project is changed. You can use this to force the balance parameters to be re-computed even if the list of images did not change.