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EXIF数据类型解释

[英]EXIF datatypes interpretation

原文 2012-10-04 12:08:20 5 1 c/ types/ jpeg/ exif/ metadatatype

I am looking into the EXIF format to write a parser. 我正在研究EXIF格式来编写解析器。 The tags are present here. 标签在这里。 http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/EXIF.html#LightSource http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/EXIF.html#LightSource

1)Some of the fields have 'undef' as the datatype. 1）有些字段的数据类型为'undef'。 How would you use such a field? 您将如何使用这样的字段？ What type do we assume it to be? 我们假设它是哪种类型？

2) Some datatypes are like this int16u[2]!. 2）一些数据类型是这样的int16u [2]!。 The exclamation means unsafe(when the cursor moves over it). 感叹号表示不安全（当光标移到它上面时）。 But, what does that mean? 但是，这是什么意思？

3) Another datatype is N. I don't understand what that means. 3）另一个数据类型是N。我不明白这是什么意思。

1 个解决方案

I see that the mentioned document has been revised at 13-Oct-2012, which is after you have asked your question. 我看到提到的文档是在您提出问题之后的2012年10月13日进行了修订。 So I suggest to check again - maybe it has less "holes" now. 因此，我建议再次检查-也许现在“漏洞”减少了。