#23497 [Opn->WFx]: computation of 35mmFocalLength (exif)
| From: | helly@php.net | Date: | Mon, 05 May 2003 23:16:35 +0000 |
| Subject: | #23497 [Opn->WFx]: computation of 35mmFocalLength (exif) | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-39120@lists.php.net to get a copy of this message | ||
ID: 23497
Updated by: helly@php.net
Reported By: francois at guillier dot org
-Status: Open
+Status: Wont fix
Bug Type: *Graphics related
PHP Version: 4CVS-2003-05-05 (stable)
New Comment:
This is an approximation that maybe is wrong but every manufacturer
does its own error. So maybe the correct thing would be to provide an
ini setting for that.
If you come up with a hint that shows that 36 is really better i
consider changing it. Otherwise there will be now change before next
major version.
Previous Comments:
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[2003-05-05 16:59:23] francois at guillier dot org
In the following code (around ligne 3830 of exif.c):
exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "35mmFocalLength"
TSRMLS_CC, "%dmm",
(int)(ImageInfo.FocalLength/ImageInfo.CCDWidth*35+0.5));
Why is CCDWidth multiplied by 35 knowing than, on 35mm film,
the image actual size is 36x24mm?
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Edit this bug report at http://bugs.php.net/?id=23497&edit=1