如何在 PHP 中添加 Gpano XMP 元数据？

Question

我需要在 PHP 中以编程方式添加 Gpano 元数据，但我不知道该怎么做。

输入：没有 Gpano 元数据的简单 360 度图像。格式 : jpeg, jpg.

输出：该图像必须与 Facebook 360 一起使用 Gpano 元数据，例如：

<rdf:Description rdf:about="" xmlns:GPano="http://ns.google.com/photos/1.0/panorama/">
    <GPano:UsePanoramaViewer>True</GPano:UsePanoramaViewer>
    <GPano:CaptureSoftware>Photo Sphere</GPano:CaptureSoftware>
    <GPano:StitchingSoftware>Photo Sphere</GPano:StitchingSoftware>
    <GPano:ProjectionType>equirectangular</GPano:ProjectionType>
    <GPano:PoseHeadingDegrees>350.0</GPano:PoseHeadingDegrees>
    <GPano:InitialViewHeadingDegrees>90.0</GPano:InitialViewHeadingDegrees>
    <GPano:InitialViewPitchDegrees>0.0</GPano:InitialViewPitchDegrees>
    <GPano:InitialViewRollDegrees>0.0</GPano:InitialViewRollDegrees>
    <GPano:InitialHorizontalFOVDegrees>75.0</GPano:InitialHorizontalFOVDegrees>
    <GPano:CroppedAreaLeftPixels>0</GPano:CroppedAreaLeftPixels>
    <GPano:CroppedAreaTopPixels>0</GPano:CroppedAreaTopPixels>
    <GPano:CroppedAreaImageWidthPixels>4000</GPano:CroppedAreaImageWidthPixels>
    <GPano:CroppedAreaImageHeightPixels>2000</GPano:CroppedAreaImageHeightPixels>
    <GPano:FullPanoWidthPixels>4000</GPano:FullPanoWidthPixels>
    <GPano:FullPanoHeightPixels>2000</GPano:FullPanoHeightPixels>
    <GPano:FirstPhotoDate>2012-11-07T21:03:13.465Z</GPano:FirstPhotoDate>
    <GPano:LastPhotoDate>2012-11-07T21:04:10.897Z</GPano:LastPhotoDate>
    <GPano:SourcePhotosCount>50</GPano:SourcePhotosCount>
    <GPano:ExposureLockUsed>False</GPano:ExposureLockUsed>
</rdf:Description>

最重要的是这些行：

<GPano:UsePanoramaViewer>True</GPano:UsePanoramaViewer>
<GPano:ProjectionType>equirectangular</GPano:ProjectionType>

我尝试了这里提供的 PHP JPEG 元数据工具包：http://www.ozhiker.com/electronics/pjmt/ 这是我的代码，但不知道要添加什么：

require_once('PHP_JPEG_Metadata_Toolkit_1.12/JPEG.php');
require_once('PHP_JPEG_Metadata_Toolkit_1.12/XMP.php');

$metas = get_jpeg_header_data('image.jpg');
put_XMP_text($metas, 'what to write here ?');

我还尝试了 windows 完美运行的软件，但无法在我的网络服务器上使用它 (linux)：Exif Fixer for Windows 此处可用：http://panoramaphotographer.com/software/exiffixer/

如果有人可以帮助我编写代码，或者如果有人可以 post 一个可行的示例，那就太棒了！

提前谢谢大家。

Answer 1

我用了The PHP JPEG Metadata Toolkit.

请注意它已经几年没有更新了，可能会在 PHP 7+ 中抛出一些错误，这些错误很容易修复（比如简短的 php 标签和数字前的 0） .

修复后，用法就很简单了：

require 'PHP_JPEG_Metadata_Toolkit_1.12/' . 'EXIF.php';

$filename = 'test.jpg';
$jpeg_header_data = get_jpeg_header_data($filename);
$xmp = '
<rdf:Description rdf:about="" xmlns:GPano="http://ns.google.com/photos/1.0/panorama/">
<GPano:UsePanoramaViewer>True</GPano:UsePanoramaViewer>
<GPano:CaptureSoftware>Photo Sphere</GPano:CaptureSoftware>
<GPano:StitchingSoftware>Photo Sphere</GPano:StitchingSoftware>
<GPano:ProjectionType>equirectangular</GPano:ProjectionType>
<GPano:PoseHeadingDegrees>350.0</GPano:PoseHeadingDegrees>
<GPano:InitialViewHeadingDegrees>90.0</GPano:InitialViewHeadingDegrees>
<GPano:InitialViewPitchDegrees>0.0</GPano:InitialViewPitchDegrees>
<GPano:InitialViewRollDegrees>0.0</GPano:InitialViewRollDegrees>
<GPano:InitialHorizontalFOVDegrees>75.0</GPano:InitialHorizontalFOVDegrees>
<GPano:CroppedAreaLeftPixels>0</GPano:CroppedAreaLeftPixels>
<GPano:CroppedAreaTopPixels>0</GPano:CroppedAreaTopPixels>
<GPano:CroppedAreaImageWidthPixels>4000</GPano:CroppedAreaImageWidthPixels>
<GPano:CroppedAreaImageHeightPixels>2000</GPano:CroppedAreaImageHeightPixels>
<GPano:FullPanoWidthPixels>4000</GPano:FullPanoWidthPixels>
<GPano:FullPanoHeightPixels>2000</GPano:FullPanoHeightPixels>
<GPano:FirstPhotoDate>2012-11-07T21:03:13.465Z</GPano:FirstPhotoDate>
<GPano:LastPhotoDate>2012-11-07T21:04:10.897Z</GPano:LastPhotoDate>
<GPano:SourcePhotosCount>50</GPano:SourcePhotosCount>
<GPano:ExposureLockUsed>False</GPano:ExposureLockUsed>
</rdf:Description>
';
$jpeg_header_data = put_XMP_text($jpeg_header_data, $xmp);
put_jpeg_header_data($filename, $filename, $jpeg_header_data);

您可以在 Google Developers documentation page 中找到有关所需 XMP 元数据的更多信息。

如何在 PHP 中添加 Gpano XMP 元数据？

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