# THUMBNAIL

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
BUGS
SEE ALSO

## NAME

| thumbnail - create a TIFF file with thumbnail images

## SYNOPSIS

| thumbnail [ options ] input.tif output.tif

## DESCRIPTION

| thumbnail is a program written to show how one might use the SubIFD tag (#330) to store thumbnail images. thumbnail copies a TIFF Class F facsimile file to the output file and for each image an 8-bit greyscale thumbnail sketch. The output file contains the thumbnail image with the associated full-resolution page linked below with the SubIFD tag.

| By default, thumbnail images are 216 pixels wide by 274 pixels high. Pixels are calculated by sampling and filtering the input image with each pixel value passed through a contrast curve.

## OPTIONS

| -w

| Specify the width of thumbnail images in pixels.

| -h

| Specify the height of thumbnail images in pixels.

| -c

| Specify a contrast curve to apply in generating the thumbnail images. By default pixels values are passed through a linear contrast curve that simply maps the pixel value ranges. Alternative curves are: exp50 for a 50% exponential curve, exp60 for a 60% exponential curve, exp70 for a 70% exponential curve, exp80 for a 80% exponential curve, exp90 for a 90% exponential curve, exp for a pure exponential curve, linear for a linear curve.

## BUGS

| There are no options to control the format of the saved thumbnail images.

## SEE ALSO

| tiffdump(1), tiffgt(1), tiffinfo(1), libtiff(3)