EXIF_THUMBNAIL(3) 1 EXIF_THUMBNAIL(3)exif_thumbnail - Retrieve the embedded thumbnail of a TIFF or JPEG imageSYNOPSIS
string exif_thumbnail (string $filename, [int &$width], [int &$height], [int &$imagetype])
DESCRIPTION exif_thumbnail(3) reads the embedded thumbnail of a TIFF or JPEG image.
If you want to deliver thumbnails through this function, you should send the mimetype information using the header(3) function.
It is possible that exif_thumbnail(3) cannot create an image but can determine its size. In this case, the return value is FALSE but
$width and $height are set.
PARAMETERS
o $filename
- The name of the image file being read. This image contains an embedded thumbnail.
o $width
- The return width of the returned thumbnail.
o $height
- The returned height of the returned thumbnail.
o $imagetype
- The returned image type of the returned thumbnail. This is either TIFF or JPEG.
RETURN VALUES
Returns the embedded thumbnail, or FALSE if the image contains no thumbnail.
EXAMPLES
Example #1
exif_thumbnail(3) example
<?php
if (array_key_exists('file', $_REQUEST)) {
$image = exif_thumbnail($_REQUEST['file'], $width, $height, $type);
} else {
$image = false;
}
if ($image!==false) {
header('Content-type: ' .image_type_to_mime_type($type));
echo $image;
exit;
} else {
// no thumbnail available, handle the error here
echo 'No thumbnail available';
}
?>
SEE ALSO exif_read_data(3), image_type_to_mime_type(3).
PHP Documentation Group EXIF_THUMBNAIL(3)
Check Out this Related Man Page
THUMBNAIL(1) General Commands Manual 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. 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% exponen-
tial 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)
September 26, 1994 THUMBNAIL(1)
How do you make video thumbnails like this in Linux? The only program I know of that can do this is Media Player Classic. I hope there is a way to do this in Linux. What would these types of thumbnails be called?
http://i255.photobucket.com/albums/hh133/COKEDUDEUSF/barcelona.jpg (2 Replies)
hi,
I am trying to embed an image to the body of the email, but the image is not visible.
echo "<html>
<body>
<style>
body {background-color:blue}
</style>
<h1>hello</h1>
<center>
<img... (1 Reply)