NIST Special Database 4

Fingerprint Database

CJ. Watson and C.L. Wilson

National Institute of Standards and Technology
Advanced Systems Division
Image Recognition Group
March 17, 1992

Users' Guide Appendices

CONTENTS

Appendix A: Database Fingerprint Image Samples

Appendix B: Database Reflectance and Resolution Calibration

Appendix C: Chart of Referenced Fingerprints

Appendix D: Manual Pages for Database Source Code

 

 

Appendix A: Database Fingerprint Image Samples

Fig. A1

 

Fig. A2

 

 

Appendix B: Database Reflectance and Resolution Calibration

Fig. B1

Database Resolution Calibration

The resolution of the scanner used to create the database was calibrated using a NBS lOlOA resolution chart1. A portion of this image is shown below (Figure B.2) after being magnified for viewing (Note: Printing has reduced the overall quality of this image.). The scan of the table showed that the vertical resolution was approximately 8.0 line pairs/mm and the horizontal resolution was approximately 6.3 line pairs/mm.

Fig. B2

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Appendix C: Chart of Referenced Fingerprints

p.18

 

p.19

 

p.20

 

p.21

 

p.22

 

p.23

 

p.24

 

p.25

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Appendix D: Manual Pages for Database Source Code

DCPLLJPG(l)      USER COMMANDS      DCPLLJPG(l)

  NAME
          dcplljpg - jpeg loss less decompression for Ihead 8 bit gray scale images

SYNOPSIS
          dcplljpg ihdrfile

DESCRIPTION

Dcplljpg takes an 8 bit gray scale ihead image, which was compressed using jpegcomp4, and decompresses it using techiques from the committee draft ISO/IEC CD 10198-1 for "Digital Compression and Coding of Continuous-tone Still images" with modifications to the draft image header.

NOTE: dcplljpg does not allow more than 8 bits/pixel input precision

OPTIONS
          ihdrfile
               Any 8 bit gray scale ihead raster image
              (previously B+c compressed using jpegcomp4).

EXAMPLES
          dcplljpg foo.pct

FILES
          ihead.h           NIST's raster header include file

           jpeg.h           Include file for jpeg algorithm

SEE ALSO
          dumpihdr(l),          ihdr2sun(1),           ReadIheadRaster(3),
           writeihdrfile(3)

DIAGNOSTICS
          dcpllppg exists with a status of -1 if an error occurs.

BUGS
           dcplljpg only handles gray scale images up to 8 bits per pixel precision.


  Sun Release 4.1 Last change: 14 November 1991 1 27

 

DUMPIHDR(l)                USER COMMANDS                DUMPIHDR(l)

 

NAME
          dumpih - takes an NIST IHead image file and prints its header content to stdout

SYNOPSIS
           dumpihdr ihdrfile

 

DESCRIPTION

Dumpihdr opens an NIST IHead rasterfile and formats and prints its header contents to stdout.

OPTIONS
          ihdrfile
                    any NIST IHead image file name

EXAMPLES
          dumpihdr foo.pct

FILES
          ihead.h           NIST's raster header include file 3
SEE ALSO
          ihdr2sun(1),     ReadIheadRaster(3),      writeihdrfile(3),
          writeihdr(3),     readihdr(3),     printihdr(3)

DIAGNOSTICS
          Dumpihdr exits with a status of -1 if opening ihdrfile fails.

BUGS


Release 4.1          Last change: 15 March 1990

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IHDR2SUN(1)          USER COMMANDS          IHDR2SUN(1)

NAME
          ihdr2sun - takes a NIST ihead image and converts it to a Sun rasterfile

SYNOPSIS
           ihdr2sun [ -o outfile] ihdrfile [ mapfile ]

  DESCRIPTION

Ihdr2sun converts a NIST ihead rasterfile to a Sun raster-file. If the optional argument mapfile is included on the command line and the input image is multiple bitplane, the colormap in mapfile will be inserted into the Sun raster-file, otherwise a default colormap gray.map will be used when necessary. The Sun image file created will have the root name of ihdrfile with the extension .ras appended, unless an alternate outfile is specified.

OPTIONS
          ihdrfile
                     any ihead raster image
           mapfile
                     optional colormap file

EXAMPLES
            ihdr2sun foo.pct gray.map

FILES
           /usr/include/rasterfile.h
                     sun's raster header include file
          ihead.h
                    NIST's raster header include file

SEE ALSO
          dumpidhr(l), sunalign(l), rasterfile(5)

DIAGNOSTICS
          Ihdr2sun exits with a status of -1 if opening ihdrfile fails.

  BUGS
          i Ihdr2sun does not currently support multiple bit levels per
          pixel other than depth 8.

Sun Release 4.1      Last change:      08 March 1990 1 29

 

SUNALIGN(l)          USER COMMANDS           SUNALIGN(l)

NAME
          suna1ign - takes a sun rasterfile and word aligns its scan lines

SYNOPSIS
         sunalign sunrasterfile

DESCRIPTION

Sunalign takes the file sunrasterfile and determines if the stored scan lines in the file require word alignment. If so, the command overwrites the image data making scan lines word aligned. This command is useful when taking clipped images from the HP Scan Jet and importing them into Frame Maker.

OPTIONS
          sunrasterfile
                    any sun rasterfile image

EXAMPLES
          sunalign foo.ras

FILES
            /usr/include/rasterfile.h
                     sun's raster header include file

SEE ALSO
          rasterfile(5)

DIAGNOSTICS
          Sunalign exits with a status of -1 if opening sunrasterfile fails.

BUGS

Sun Release 4.1            Last change: 08 March 1990

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READIHEADRASTER(3)           C LIBRARY FUNCTIONS           READIHEADRASTER(3)

NAME
           ReadIheadRaster - loads into memory an ihead structure
           corresponding image data from a file

SYNOPSIS
           #include <ihead.h>

           ReadIheadRaster(file, head, data, width, height, depth)
           char *file;
           IHEAD **head;
           unsigned char **data;            int *width, *height, *depth;

DESCRIPTION

ReadIheadRaster() opens a file named file and allocates and loads into memory an ihead structure and its corresponding raster image data. If the image data is compressed, ReadIheadRaster will uncompress the data before returning the data buffer. This routine also returns several integers converted from their corresponding ASCII entries found in the header. The source is found in the source code file rasterio.c.

          file - the name of the file to be read from

          head - a pointer to where an ihead structure is to be allocated and loaded

          data - a pointer to where the array of binary raster image data is to be allocated and loaded

          width - integer pointer containing the image's pixel width upon return

          height - integer pointer containing the image's pixel height upon return

          depth - integer pointer containing the image's Bits Per Pixel upon return

SEE ALSO
          printihdr(3), readihdr(3), writeihdrfile(3), writeihdr(3), dumpihdr(l)

DIAGNOSTICS
          ReadIheadRaster() exits with -1 when opening file fails.

BUGS

 

Sun Release 4.1          Last change: 05 March 1990


 

JPGLLDCP(3)          C LIBRARY FUNCTIONS          JPGLLDCP(3)

NAME

jpglldcp - takes a jpeg lossless compressed input data buffer (with modified data header) and writes the uncompressed data to the passed output buffer

SYNOPSIS

          void jpglldcp(indata, width, height, depth, outbuffer)
          unsigned char *indata, *outbuffer;
          int width, height, depth;

DESCRIPTION

jpglldcp() takes the input buffer indata and decompresses it writing the uncompressed data into the output buffer outbuffer with length equal to the original image dimensions given. This procedure was developed using techniques from the committe draft ISO/IEC CD 10198-1 for "Digital Compression and Coding of Continuous-tone Still Images" with modifications to the draft image header. The source is found in the source code file jpglldcp.c.
          indata - the compressed data input buffer

          width - the pixel width of the image from which the input data came

          height - the pixel height of the image from which the input data came

          depth - the pixel depth of the image from which the input data came

          outbuffer - the output buffer in which the uncompressed data is to be returned

SEE ALSO
          dcplljpg(l), ReadIheadRaster(3), writeihdrfile(3)

BUGS

NOTE: jpglldcp will only work with gray-scale images that were compressed using a modified data header (not the standard lossless jpeg data header).

Sun Release          4.1 Last change: 14 January 1992

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PRINTIHDR(3)          C LIBRARY FUNCTIONS          PRINTIHDR(3)

NAME
           printihdr - prints an ihead structure to the passed file pointer

  SYNOPSIS
          #include <ihead.h>

          printihdr (head, fp)
          IHEAD *ihead;
         FILE *fp;

DESCRIPTION

Printihdr() takes a pointer to an ihead structure and prints the ihead structure to the file pointed to by fp. The source is found in the source code file ihead.c.
          fp - an open file pointer

          ihead - a pointer to an initialized ihead structure

SEE ALSO
          writeihdrfile(3), writeihdr(3), readihdr(3), ReadIheadRaster(3), dumpihdr(l)

BUGS

 

Sun Release 4.1          Last change: 15 January 1992

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READIHDR(3)         C LIBRARY FUNCTIONS READIHDR(3)

 

NAME

readihdr - allocates and reads header information into an ihead structure and returns the initialized structure
SYNOPSIS
          #include <ihead.h>

         readihdr(fp)
         FILE *fp;

DESCRIPTION

        Readihdr() takes a file pointer to an ihead structured file. Then allocates and reads the header information from the file into an ihead structure. The source is found in the source code file ihead.c.

          fp - an open file pointer

SEE ALSO
          ReadIheadRaster(3), writeihdrfile(3, printihdr(3), writeihdr(3), dumpihdr(l)

BUGS


Sun Release 4.1         Last change: 16 January 1992

WRITEIHDRFILE{3)         C LIBRARY FUNCTIONS         WRITEIHDRFILE(3)

NAME
          writeihdrfile - writes an ihead structure and corresponding date to a file

SYNOPSIS
          #include <ihead.h>

          writeihdrfile(file, head, data)
          char *file;
          IHEAD *head;
          unsigned char *data;

DESCRIPTION

Writeihdrfile() opens a file name file and writes an ihead structure and it corresponding image data to it. The source is found in the source code file rasterio.c.
          file - the name of the file to be created

          head - a pointer to an initialized ihead structure

          data - the array of raster image data

SEE ALSO
          writeihdr(3), printihdr(3), ReadIheadRaster(3), readihdr(3), dumpihdr(l)

DIAGNOSTICS
          Writeihdrfile()) exits with -1 when opening file fails.

BUGS

 

Sun Release         Last change: 16 January 1992

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WRITEIHDR(3)         C LIBRARY FUNCTIONS         WRITEIHDR(3)

NAME
          writeihdr - writes an ihead structure to an open file

SYNOPSIS
          #include <ihead.h>

          writeihdr(fp, ihead)
          FILE *fp;
          IHEAD *ihead;

DESCRIPTION

Writeihdr() takes a pointer to an ihead structure and writes it to the open file pointed to by fp. The source is found in the source code file ihead.c.
           fp - an open file pointer

          ihead - a pointer to an initialized ihead structure

  SEE ALSO
          writeihdrfile(3), printihdr(3), readihdr(3), ReadIheadRas- ter(3), dumpihdr(l)

BUGS

Sun Release 4.1         Last change: 02 March 1990

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