11-20-2017
Probability is high that ALL your code can be combined into one single awk script. Unfortunately your min works only if the first line in output.txt has non-null value, so with your sample data the rest of the algorithm (which I don't really understand) doesn't work out, always printing the input line followed by a zero.
Any corrections to the algorithm?
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LEARN ABOUT OPENSOLARIS
ppm2tiff
ppm2tiff(1) User Commands ppm2tiff(1)
NAME
ppm2tiff - create a TIFF file from a PPM image file
SYNOPSIS
ppm2tiff [options] [input.ppm] output.tif
DESCRIPTION
ppm2tiff converts a file in the PPM image format to TIFF. By default, the TIFF image is created with data samples packed (PlanarConfigura-
tion=1), compressed with the Lempel-Ziv and Welch algorithm (Compression=5), and with each strip no more than 8 kilobytes. These character-
istics can be overridden or explicitly specified with the options described below.
If the PPM file contains grayscale data, the PhotometricInterpretation tag is set to 1 (min-is-black). Otherwise, the PhotometricInterpre-
tation tag is set to 2 (RGB).
If no PPM file is specified on the command line, ppm2tiff reads from the standard input.
OPTIONS
The following options are supported:
-c Specify a compression scheme to use when writing image data:
-c jpeg Baseline JPEG compression algorithm.
-c lzw Lempel-Ziv and Welch algorithm. This is the default algorithm.
-c none No compression.
-c packbits PackBits compression algorithm.
-c zip Deflate compression algorithm.
-r Write data with a specified number of rows per strip. By default, the number of rows per strip is selected so that each
strip is approximately 8 kilobytes.
-R Mark the resultant image to have the specified X and Y resolution, in dots per inch.
OPERANDS
The following operands are supported:
input.ppm The name of the input file that contains PPM data.
output.tif The name of the output file that contains TIFF data.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWTiff |
+-----------------------------+-----------------------------+
|Interface stability |Uncommitted |
+-----------------------------+-----------------------------+
SEE ALSO
tiffinfo(1), tiffcp(1), tiffmedian(1), libtiff(3)
NOTES
Updated by Breda McColgan, Sun Microsystems Inc., 2004.
SunOS 5.11 26 Mar 2004 ppm2tiff(1)