ANSI-C program: ras_linear.c
NAME
ras_linear - Converts a real valued input data file (float) to an
(8-bit) SUN raster or BMP format image using linear scaling.
SYNOPSIS
ras_linear <pwr> [width] [start] [nlines] [pixavr]
[pixavaz] [min] [max] [LR] [raster] [inverse] [channel]
| <pwr> | intensity image (float) |
| <width> | samples per row of pwr |
| [start] | starting line of pwr (default=1) |
| [nlines] | number of lines to display (default=0: to end of file) |
| [pixavr] | number of pixels to average in range (default=1) |
| [pixavaz] | number of pixels to average in azimuth (default=1) |
| [min] | minimum value for display (default=0.0) |
| [max] | maximum value for display (default=1.0) |
| [LR] | left/right flipping flag, (default=1: normal, -1: mirror image) |
| [rasf] | output (or input) rasterfile (default=*.ras: SUN raster format, *.bmp: BMP format) |
| [inverse] | inverse flag (default=1: float_to_raster, -1: raster_to_float) |
| [channel] | RBG channel flag (default=1:red, 2:green, 3:blue) |
EXAMPLES
ras_linear 1825_1868.cc 2500 1 0 3 3 0.0 1.0
1825_1868.cc.ras
Generates an (8-bit) SUN raster (gray-scaled) from the input coherence file using linear scaling between 0.0 and 1.0, with a 3x3 average.
ras_linear 1825_1868.hgt 2500 1 0 1 1 400.0 1200.0 1825_1868.hgt.ras
Generates an (8-bit) SUN raster (gray-scaled) from the input height map using linear scaling between 400 and 1200.
DESCRIPTION
ras_linear generates an 8-bit SUN raster or BMP format
image from a real valued input data file (float) using linear
scaling.The output is an 8-bit image, the gray-scale correspond
to values between the minimum value specified (--> 0, black)
and the maximum value specified (-> 255, white).
The inverse operation can also be performed that converts the input raster file back to floating point data. If the input image is 24 bits/pixel, one of the 3 color channels can be selected for the inverse operation. In the case of 8 bits/pixel images, the channel value is derived from one of the channels of the associated color table entry.
OPTIONS
Multi-looking and the selection of a reduced number of lines may
be applied. For the generation of a raster image using
logarithmic scaling the program ras_dB,
and for power law scaling the program raspwr (is part of the
interferometric SAR processor, ISP), may be used.
NOTES
None.