使IPTC数据可搜索 [英] making IPTC data searchable

问题描述

我有关于IPTC元数据的问题。是否可以通过其IPTC元数据（关键字）搜索不在数据库中的图像并显示它们，我将如何进行？我只需要一个基本的想法。

I have a question about IPTC metadata. Is it possible to search images that aren't in a database by their IPTC metadata (keywords) and show them and how would I go about doing this? I just need a basic idea.

我知道PHP有iptcparse（）函数。

I know there is the iptcparse() function for PHP.

我已经写了一个函数来获取图库文件夹中所有图像的图像名称，位置和扩展名，以及所有子目录的.jpg扩展名。

I have already written a function to grab the image name, location, and extension for all images within a galleries folder and all subdirectories by .jpg extension.

我需要找出如何提取元数据而不存储在数据库中，以及如何搜索它，抓取与搜索标签匹配的相关图片（他们的IPTC关键字应该匹配）以及如何显示它们。我知道在这一点，我有最后的结果（后搜索），我可以回声与src =$ filelocation>如果我有一个数组中的最终结果的一个imagetag。

I need to figure out how to extract the metadata without storing it in a database and how to search through it, grab the relevant images that match the search tag (their IPTC keywords should match) and how to display them. I know at the point that I have the final results (post search) i can echo an imagetag with src="$filelocation"> if i have the final results in an array.

基本上，我不知道我是否需要将所有的图像存储到一个mysql数据库，并提取关键字，并将它们存储在数据库中，以便在实际搜索和显示结果之前。

Basically, I am not sure if I need to store all my images into a mysql database and also extract the keywords and store them in the database as well before I can actually search and display the results. Also, if you could guide me to any gallery that already is able to do this, that could help as well.

感谢您对这个问题的任何帮助。

Thanks for any help regarding this issue.

推荐答案

这不清楚是什么给你的问题，但也许这将给你一些想法：

It is not clear what in particular is giving you problems, but perhaps this will give you some ideas:

<?php
# Images we're searching
$images = array('/path/to/image.jpg', 'another-image.jpg');

# IPTC keywords to values (from exiv2, see below)
$query = array('Byline' => 'Some Author');

# Perform the search
$result = select_jpgs_by_iptc_fields($images, $query);

# Display the results
foreach ($result as $path) {
    echo '<img src="', htmlspecialchars($path), '">';
}

function select_jpgs_by_iptc_fields($jpgs, $query) {
    $matches = array();
    foreach ($jpgs as $path) {
        $iptc = get_jpg_iptc_metadata($path);
        foreach ($query as $name => $values) {
            if (!is_array($values))
                $values = array($values);
            if (count(array_intersect($iptc[$name], $values)) != count($values))
                continue 2;
        }
        $matches[] = $path;
    }
    return $matches;
}

function get_jpg_iptc_metadata($path) {
    $size = getimagesize($path, $info);
    if(isset($info['APP13']))
    {
        return human_readable_iptc(iptcparse($info['APP13']));
    }
    else {
        return null;
    }
}

function human_readable_iptc($iptc) {
# From the exiv2 sources
static $iptc_codes_to_names =
array(    
// IPTC.Envelope-->
"1#000" => 'ModelVersion',
"1#005" => 'Destination',
"1#020" => 'FileFormat',
"1#022" => 'FileVersion',
"1#030" => 'ServiceId',
"1#040" => 'EnvelopeNumber',
"1#050" => 'ProductId',
"1#060" => 'EnvelopePriority',
"1#070" => 'DateSent',
"1#080" => 'TimeSent',
"1#090" => 'CharacterSet',
"1#100" => 'UNO',
"1#120" => 'ARMId',
"1#122" => 'ARMVersion',
// <-- IPTC.Envelope
// IPTC.Application2 -->
"2#000" => 'RecordVersion',
"2#003" => 'ObjectType',
"2#004" => 'ObjectAttribute',
"2#005" => 'ObjectName',
"2#007" => 'EditStatus',
"2#008" => 'EditorialUpdate',
"2#010" => 'Urgency',
"2#012" => 'Subject',
"2#015" => 'Category',
"2#020" => 'SuppCategory',
"2#022" => 'FixtureId',
"2#025" => 'Keywords',
"2#026" => 'LocationCode',
"2#027" => 'LocationName',
"2#030" => 'ReleaseDate',
"2#035" => 'ReleaseTime',
"2#037" => 'ExpirationDate',
"2#038" => 'ExpirationTime',
"2#040" => 'SpecialInstructions',
"2#042" => 'ActionAdvised',
"2#045" => 'ReferenceService',
"2#047" => 'ReferenceDate',
"2#050" => 'ReferenceNumber',
"2#055" => 'DateCreated',
"2#060" => 'TimeCreated',
"2#062" => 'DigitizationDate',
"2#063" => 'DigitizationTime',
"2#065" => 'Program',
"2#070" => 'ProgramVersion',
"2#075" => 'ObjectCycle',
"2#080" => 'Byline',
"2#085" => 'BylineTitle',
"2#090" => 'City',
"2#092" => 'SubLocation',
"2#095" => 'ProvinceState',
"2#100" => 'CountryCode',
"2#101" => 'CountryName',
"2#103" => 'TransmissionReference',
"2#105" => 'Headline',
"2#110" => 'Credit',
"2#115" => 'Source',
"2#116" => 'Copyright',
"2#118" => 'Contact',
"2#120" => 'Caption',
"2#122" => 'Writer',
"2#125" => 'RasterizedCaption',
"2#130" => 'ImageType',
"2#131" => 'ImageOrientation',
"2#135" => 'Language',
"2#150" => 'AudioType',
"2#151" => 'AudioRate',
"2#152" => 'AudioResolution',
"2#153" => 'AudioDuration',
"2#154" => 'AudioOutcue',
"2#200" => 'PreviewFormat',
"2#201" => 'PreviewVersion',
"2#202" => 'Preview',
// <--IPTC.Application2
      );
   $human_readable = array();
   foreach ($iptc as $code => $field_value) {
       $human_readable[$iptc_codes_to_names[$code]] = $field_value;
   }
   return $human_readable;
}

这篇关于使IPTC数据可搜索的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！