blend

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Contents: Description, Arguments, Usage, Examples, Images, Sub-Functions, Related Functions, Source

Supported Under Version: >1.02

Current .dvrc Version: 1.03

Description

Used to blend two images of equal x and y dimension together. They must be in v_object form. Primarily used in mosaics.

Last Updated: Thu May 4 16:56:59 MST 2006

Arguments and Return Values

Arguments: Two v_objects containing geometrically overlapping data to be blended together, a value designating the number of pixels from the edge of the data to blend and the numeric value of non-data points.

Return Value: The second v_object of the inputs will be altered containing a blended composite of the two input images.

Usage

Syntax: blend(src, dst [, stp = INT] [, ignore = VAL][, avg = VAL])

src - A v_object structure containing the image you wish to add to the other image.

dst - A v_object structure that will have the src image added to it.

stp - An optional numeric value for the algorithm to stop counting pixels from the edge of the image. The smaller the stp value the sharper/shorter the ramp.

ignore - The value of 'blank' pixels in the data. The numeric value of black space.

avg = 1 - average the overlapping sections where data is available (default)

avg = 0 - replace the src image where overlapping sections are available

The data elements of the two v_objects need not be the same size.

Examples

 dv> out
 struct, 7 elements
     x: -736
     y: 44521
     w: 1441
     h: 2141
     lines: 0
     samples: 0
     data: 1441x2141x1 array of short, bsq format [6,170,362 bytes]

 dv> d
 struct, 7 elements
     x: -314
     y: 44530
     w: 1018
     h: 2141
     lines: 0
     samples: 0
     data: 1018x2141x1 array of short, bsq format [4,359,076 bytes]

 dv> blend(src=d, dst=out, stp=00, ignore=ignore)

 dv>

Images