Imagick::getImageProperties

(PECL imagick 2, PECL imagick 3)

Imagick::getImagePropertiesDevuelve las propiedades EXIF de la imagen

Descripción

public Imagick::getImageProperties(string $pattern = "*", bool $include_values = true): array

Devuelve todas las propiedades de la imagen que cumplen con un patrón. Si se pasa false como segundo argumento, solo se devuelven los nombres de las propiedades. Este método está disponible si Imagick ha sido compilado con la versión 6.3.6 o superior de ImageMagick.

Parámetros

pattern

El patrón para los nombres de propiedades.

include_values

Si se deben devolver únicamente los nombres de las propiedades. Si se proporciona false, entonces solo se devolverán los nombres de las propiedades.

Valores devueltos

Devuelve un array que contiene las propiedades de la imagen, o sus nombres.

Ejemplos

Ejemplo #1 Ejemplo con Imagick::getImageProperties()

Ejemplo de extracción de información EXIF.

<?php

/* Crea un objeto */
$im = new imagick("/path/to/example.jpg");

/* Lee las informaciones EXIF */
$exifArray = $im->getImageProperties("exif:*");

/* Recorre las propiedades EXIF */
foreach ($exifArray as $name => $property)
{
echo
"{$name} => {$property}<br />\n";
}

?>

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User Contributed Notes 4 notes

up
1
holdoffhunger at gmail dot com
13 years ago
The getImageProperties function in PHP returns an array of property keys available for an image. To get these property values, you use getImageProperty function, giving it one of the available keys provided by the getImageProperties function result. For some images, you may have a lot of properties and for some, you may have few. The two that almost every image seems to have are "date:create" and "date:modify", but some images may have forty or more properties, some titled "exif:Compression", "photoshop:Credit", "jpeg:colorspace", "rdf:Alt", "stRef:documentID", and "xap:CreatorTool." PNG files will also have properties like "png:IHDR.bit_depth" and "png:IHDR.width,height." So far, it appears generally that GIF and BMP files, being simpler, have fewer properties, whereas JPEG and PNG files, being more complicated, have much wider array of properties. It seems incredibly useful in document management.

And now, some sample code and results :

<?php

// Author: holdoffhunger@gmail.com

// Imagick Type
// ---------------------------------------------

$imagick_type = new Imagick();

// Open File
// ---------------------------------------------

$file_to_grab = "image_workshop_directory/test.png";

$file_handle_for_viewing_image_file = fopen($file_to_grab, 'a+');

// Grab File
// ---------------------------------------------

$imagick_type->readImageFile($file_handle_for_viewing_image_file);

// Get Image Properties
// ---------------------------------------------

$imagick_type_properties = $imagick_type->getImageProperties('*', FALSE);

// Print Image Properties
// ---------------------------------------------

print("<pre>");

print_r($imagick_type_properties);

// Print Each Individual, Image Property
// ---------------------------------------------

foreach($imagick_type_properties as $value)
{
print(
"$value --- ");
print(
$imagick_type->getImageProperty("$value"));
print(
"<br><br>");
}

print(
"</pre>");

?>

Results of this done on a standard PNG image :

Array
(
[0] => date:create
[1] => date:modify
[2] => png:cHRM
[3] => png:gAMA
[4] => png:IHDR.bit_depth
[5] => png:IHDR.color_type
[6] => png:IHDR.interlace_method
[7] => png:IHDR.width,height
[8] => png:sRGB
)
date:create --- 2012-05-19T18:26:45-05:00

date:modify --- 2012-05-19T18:26:45-05:00

png:cHRM --- chunk was found (see Chromaticity, above)

png:gAMA --- gamma=0.45455 (See Gamma, above)

png:IHDR.bit_depth --- 8

png:IHDR.color_type --- 2

png:IHDR.interlace_method --- 0

png:IHDR.width,height --- 320, 320

png:sRGB --- intent=0 (See Rendering intent)
up
0
benkuhl at gmail dot com
12 years ago
The output of this method on a PDF:

Array
(
[date:create] => 2013-01-24T13:27:37-05:00
[date:modify] => 2013-01-24T13:27:37-05:00
[pdf:HiResBoundingBox] => 1089x396+0+0
[pdf:SpotColor-0] => PANTONE 697 C
[pdf:SpotColor-1] => Black
[pdf:SpotColor-10] => PANTONE 504 M C
[pdf:SpotColor-2] => Strike_Thru
[pdf:SpotColor-3] => PANTONE 7421 C
[pdf:SpotColor-4] => PANTONE 697 C
[pdf:SpotColor-5] => PANTONE 873 C
[pdf:SpotColor-6] => PANTONE 504 M C
[pdf:SpotColor-7] => Die
[pdf:SpotColor-8] => PANTONE 697 C
[pdf:SpotColor-9] => PANTONE 504 M C
[pdf:Version] => PDF-1.5
[signature] => 4d871b27b26537c523326f92454ecb2e19fa9e0e86e2a075f97354ad4f3bf122
)
up
0
mhufford
15 years ago
ImageMagick only supports setting a very small number of EXIF properties.

See http://www.imagemagick.org/discourse-server/viewtopic.php?t=14234
up
-2
www dot query at gmail dot com
13 years ago
To access a photograph's EXIF data an alternative method is the normal PHP Exif function.

<?php

$exif_data
= exif_read_data($pic1);
$edate = $exif_data['DateTime'];

?>

See: http://php.net/manual/en/book.exif.php
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