ringsautomos

This program uses a text-based list of cubes, all in the same map projection and equivalent projection parameters (PixelResolution, CenterRingLongitude, etc), to generate a mosaic. By default, The program automatically determines the size of the mosaic by examining each cube. The user also has the option of entering their own ring radius and ring longitude range to use for the mosaic.

There are four different ways/priorities (ONTOP, BENEATH, BAND and AVERAGE) for how the input image can be placed on the mosaic. In case of special pixels and the special pixel flags being enabled, the details for each priority is described in the tables below.

The TRACK feature creates a separate tracking cube in addition to the mosaic cube, and contains information for the source files of every pixel within the output mosaic. The tracking cube will have the same base-name as the mosaic cube, but will end in "_tracking.cub", and must always reside in the same directory as the mosaic cube to be properly accessed. The tracking cube will always be of type unsigned integer. Depending on the bit-type of the mosaic cube and/or the number of bands it contains, the tracking cube may be as much as four times the size of the mosaic cube itself.

The tracking cube can be used appropriately through the QVIEW-AdvancedTracking tool. As the user pans across the displayed mosaic, for every mosaic pixel location, QVIEW-AdvancedTracking will interactively report the index, the filename and the serial number of the input cube that was input to ringsautomos for that specific pixel location. Since the tracking cube is of bit-type unsigned integer, the DN values of 0, 1 and 2 are reserved for NULL, LRS and LIS, respectively, so valid pixel DN values will begin at an offset of 3. In other words, a pixel of DN value 3 in the tracking cube means that this same pixel within the mosaic was taken from the first input image. The tracking cube cannot be used outside of the QVIEW-AdvancedTracking tool except as a visual representation of the source cubes for the different pixels.

The TRACK feature works differently depending on the Priority options and whether you are using single- or multi-band cubes:

• For single band cubes, you can specify PRIORITY as ONTOP and BENEATH.
• For multiband cubes, you can use PRIORITY=BAND.
• For multiband cubes, you can use PRIORITY=ONTOP only when the NULL, HIGHSATURATION and LOWSATURATION options are set to true.
• This feature is NOT supported for any single- or multi-band cubes when using PRIORITY=AVERAGE.

Please Note: Prior to ISIS version 3.6.0, tracking for the various mosaicking apllications was being handled with an internal tracking band. Tracking is now being handled by an external tracking cube that contains the associated tracking information. This application can no longer add to mosaics of the old format. In order to continue to use these older mosaics with the updated mosaicking applications, you must first use the trackextract utility application to extract the tracking band and the associated tracking information into an external tracking cube.

Tracking can be set at the time of Mosaic creation only and cannot be turned on after the mosaic is created. For multiband mosaics, if PRIORITY=ONTOP and all the Special Pixel flags are not set to true, or if PRIORITY=BENEATH, tracking will be turned off even if it was turned on while creating the mosaic. ONTOP priority places all the valid input pixels onto the mosaic unless the special pixel flags are turned on or if the mosaic has a NULL pixel. In a multi band scenario, a pixel origin within a particular line and sample will not be the same in all the different bands.

WARNING: If Tracking is turned on in a mosaic, any subsequent applications that modify DN values will corrupt the Tracking cube.

Priority BAND can track the origin for multiband input cubes. The input cube pixels will be placed in the output mosaic based on the "Lesser" or "Greater" criteria of a priority band defined by the user. Band can be implemented with the TYPE, BANDNUMBER or KEYWORD options.

• If BANDNUMBER is chosen then the band number can be entered in the NUMBER field.
• If KEYWORD is chosen then PVL key name and value from the BANDBIN group can be entered in the KEYNAME and KEYVALUE fields.

Multiband input example with BAND priority and example parameters:

• BAND = Emission Angle band(EMA)
• Input pixels = (30,30,30) in EMA Band for some sample and line
• Corresponding pixels in the EMA band in the mosaic = (75, 75, 75)
• Criteria = GREATER than

Expected Result:

Since input pixels are not GREATER than corresponding mosaic pixels, then the input pixels are not copied to the mosaic, so also the corresponding pixels in all the other bands in the input. Hence the origin for those pixels remains unchanged.

Given this same example with CRITERIA=LESSER than:

All corresponding pixels in all the input bands will be copied to the mosaic and the origin for those pixels is the current input cube.

MATCHBANDIN, if set, requires the specified input bands to match the mosaic bands and the bands can be anywhere in the mosaic but must be contiguous for multi-band. If MATCHBANDIN is not set then any input image can be placed on the mosaic within its boundaries.

HIGHSATURATION, LOWSATURATION and NULL options, if set, will cause the the input pixels with these values to be copied to the mosaic for ONTOP and BAND priorities regardless of the CRITERIA for the BAND priority. These options are not supported for BENEATH priority.

Currently Tracking can be viewed in the Advanced Tool Tracking option of the qview application. Following are the Tracking info:

Index: Zero based and is in the order in which the image was placed on the mosaic. No origin is represented as -1.

FileName: File name of input image

Serial Number: Serial Number of the input image

The following table describes how the program will determine the pixel value in the output mosaic for areas of image overlap.

Each of the following priority option tables indicates the resulting output pixel for a particular input pixel, given the selected special pixel options (parameters HIGHSATURATION for HRS, HIS; LOWSATURATION for LRS, LIS; and NULL) in each table row.