User Commands thumbnail(1)
NAME
thumbnail - create a TIFF file with thumbnail images
SYNOPSIS
thumbnail [options] input.tif output.tif
DESCRIPTION
The thumbnail command shows how to 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, an8-bit grayscale 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 pix-
els high. Pixels are calculated by sampling and filteringthe input image with each pixel value passed through a con-
trast curve. OPTIONS The following options are supported:-c Specify a contrast curve to apply when gen-
erating the thumbnail images. By default,
pixel values are passed through a linear contrast curve that simply maps the pixelvalue ranges. Alternative curves are as fol-
lows:exp50 50% exponential
curveexp60 60% exponential
curveexp70 70% exponential
curveexp80 80% exponential
curveSunOS 5.11 Last change: 26 Mar 2004 1
User Commands thumbnail(1)
exp90 90% exponential
curve exp pure exponential curve linear linear curve-h Specify the height of thumbnail images in
pixels.-w Specify the width of thumbnail images in
pixels. OPERANDS The following operands are supported: input.tif The name of the input TIFF file. output.tif The name of the output file.ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | image/library/libtiff ||_____________________________|_____________________________|
| Interface stability | Uncommitted ||_____________________________|_____________________________|
SEE ALSO
tiffdump(1), tiffgt(1), tiffinfo(1), libtiff(3)SunOS 5.11 Last change: 26 Mar 2004 2
User Commands thumbnail(1)
NOTES There are no options to control the format of the savedthumbnail images.
Updated by Breda McColgan, Sun Microsystems Inc., 2004.SunOS 5.11 Last change: 26 Mar 2004 3