php获取图片exif属性信息的方法
$val) {
if ($name==$imageinfo) {
$infoval = &$val;
break;
}
}
return $infoval;
}
function getimageinfo($img) {
$imgtype = array(, gif, jpg, png, swf, psd, bmp, tiff(intel byte order), tiff(motorola byte order), jpc, jp2, jpx, jb2, swc, iff, wbmp, xbm);
$orientation = array(, top left side, top right side, bottom right side, bottom left side, left side top, right side top, right side bottom, left side bottom);
$resolutionunit = array(, , 英寸, 厘米);
$ycbcrpositioning = array(, the center of pixel array, the datum point);
$exposureprogram = array(未定义, 手动, 标准程序, 光圈先决, 快门先决, 景深先决, 运动模式, 肖像模式, 风景模式);
$meteringmode_arr = array(
0 => 未知,
1 => 平均,
2 => 中央重点平均测光,
3 => 点测,
4 => 分区,
5 => 评估,
6 => 局部,
255 => 其他
);
$lightsource_arr = array(
0 => 未知,
1 => 日光,
2 => 荧光灯,
3 => 钨丝灯,
10 => 闪光灯,
17 => 标准灯光a,
18 => 标准灯光b,
19 => 标准灯光c,
20 => d55,
21 => d65,
22 => d75,
255 => 其他
);
$flash_arr = array(
0 => flash did not fire,
1 => flash fired,
5 => flash fired but strobe return light not detected,
7 => flash fired and strobe return light detected,
);
$exif = exif_read_data ($img,ifd0);
if ($exif===false) {
$new_img_info = array (文件信息 => 没有图片exif信息);
}
else
{
$exif = exif_read_data ($img,0,true);
$new_img_info = array (
文件信息 => -----------------------------,
文件名 => $exif[file][filename],
文件类型 => $imgtype[$exif[file][filetype]],
文件格式 => $exif[file][mimetype],
文件大小 => $exif[file][filesize],
时间戳 => date(y-m-d h:i:s,$exif[file][filedatetime]),
图像信息 => -----------------------------,
图片说明 => $exif[ifd0][imagedescription],
制造商 => $exif[ifd0][make],
型号 => $exif[ifd0][model],
方向 => $orientation[$exif[ifd0][orientation]],
水平分辨率 => $exif[ifd0][xresolution].$resolutionunit[$exif[ifd0][resolutionunit]],
垂直分辨率 => $exif[ifd0][yresolution].$resolutionunit[$exif[ifd0][resolutionunit]],
创建软件 => $exif[ifd0][software],
修改时间 => $exif[ifd0][datetime],
作者 => $exif[ifd0][artist],
ycbcr位置控制 => $ycbcrpositioning[$exif[ifd0][ycbcrpositioning]],
版权 => $exif[ifd0][copyright],
摄影版权 => $exif[computed][copyright.photographer],
编辑版权 => $exif[computed][copyright.editor],
拍摄信息 => -----------------------------,
exif版本 => $exif[exif][exifversion],
flashpix版本 => ver. .number_format($exif[exif][flashpixversion]/100,2),
拍摄时间 => $exif[exif][datetimeoriginal],
数字化时间 => $exif[exif][datetimedigitized],
拍摄分辨率高 => $exif[computed][height],
拍摄分辨率宽 => $exif[computed][width],
/*
the actual aperture value of lens when the image was taken.
unit is apex.
to convert this value to ordinary f-number(f-stop),
calculate this value's power of root 2 (=1.4142).
for example, if the aperturevalue is '5', f-number is pow(1.41425,5) = f5.6.
*/
光圈 => $exif[exif][aperturevalue],
快门速度 => $exif[exif][shutterspeedvalue],
快门光圈 => $exif[computed][aperturefnumber],
最大光圈值 => f.$exif[exif][maxaperturevalue],
曝光时间 => $exif[exif][exposuretime],
f-number => $exif[exif][fnumber],
测光模式 => getimageinfoval($exif[exif][meteringmode],$meteringmode_arr),
光源 => getimageinfoval($exif[exif][lightsource], $lightsource_arr),
闪光灯 => getimageinfoval($exif[exif][flash], $flash_arr),
曝光模式 => ($exif[exif][exposuremode]==1?手动:自动),
白平衡 => ($exif[exif][whitebalance]==1?手动:自动),
曝光程序 => $exposureprogram[$exif[exif][exposureprogram]],
/*
brightness of taken subject, unit is apex. to calculate exposure(ev) from brigtnessvalue(bv), you must add sensitivityvalue(sv).
ev=bv+sv sv=log((isospeedrating/3.125),2)
iso100:sv=5, iso200:sv=6, iso400:sv=7, iso125:sv=5.32.
*/
曝光补偿 => $exif[exif][exposurebiasvalue].ev,
iso感光度 => $exif[exif][isospeedratings],
分量配置 => (bin2hex($exif[exif][componentsconfiguration])==01020300?ycbcr:rgb),//'0x04,0x05,0x06,0x00'=rgb '0x01,0x02,0x03,0x00'=ycbcr
图像压缩率 => $exif[exif][compressedbitsperpixel].bits/pixel,
对焦距离 => $exif[computed][focusdistance].m,
焦距 => $exif[exif][focallength].mm,
等价35mm焦距 => $exif[exif][focallengthin35mmfilm].mm,
/*
stores user comment. this tag allows to use two-byte character code or unicode. first 8 bytes describe the character code. 'jis' is a japanese character code (known as kanji).
'0x41,0x53,0x43,0x49,0x49,0x00,0x00,0x00':ascii
'0x4a,0x49,0x53,0x00,0x00,0x00,0x00,0x00':jis
'0x55,0x4e,0x49,0x43,0x4f,0x44,0x45,0x00':unicode
'0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00':undefined
*/
用户注释编码 => $exif[computed][usercommentencoding],
用户注释 => $exif[computed][usercomment],
色彩空间 => ($exif[exif][colorspace]==1?srgb:uncalibrated),
exif图像宽度 => $exif[exif][exifimagelength],
exif图像高度 => $exif[exif][exifimagewidth],
文件来源 => (bin2hex($exif[exif][filesource])==0x03?digital still camera:unknown),
场景类型 => (bin2hex($exif[exif][scenetype])==0x01?a directly photographed image:unknown),
缩略图文件格式 => $exif[computed][thumbnail.filetype],
缩略图mime格式 => $exif[computed][thumbnail.mimetype]
);
}
return $new_img_info;
}
$innerhtml = ;
$exif = getimageinfo($_get['img']);
$innerhtml .= ;
foreach($exif as $name=>$val) {
$innerhtml .= {$name} {$val}
;
}
$innerhtml .= ;
if ($_get['img']) {
$image = exif_thumbnail($_get['img']);
} else {
$image = false;
}
if ($image!==false) {
$innerhtml .= ;
} else {
// no thumbnail available, handle the error here
$innerhtml .= no thumbnail available;
}
$innerhtml .=
;
?>
图片信息