THUMBNAIL(1)

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" is created. 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 width
        Specify the width of thumbnail images in pixels.

    -h height
        Specify the height of thumbnail images in pixels.

    -c contrast
        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:
        Curve | Description
        exp50 | 50% exponential curve
        exp60 | 60% exponential curve
        exp70 | 70% exponential curve
        exp80 | 80% exponential curve
        exp90 | 90% exponential curve
        exp | pure exponential curve
        linear | 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 (3tiff),

AUTHOR
LibTIFF contributors

COPYRIGHT
1988-2022, LibTIFF contributors