如何判断照片拍摄于横向或纵向？ JPEG .NET元数据的方向 [英] how to tell if a photo was taken in landscape or portrait? JPEG .NET metadata orientation

问题描述

直通VB.net/C#有没有办法读取掀起了JPEG来告诉我们，如果照片拍摄于横向或纵向任何元数据？

Thru VB.net/C# is there any way to read any metadata of off a JPEG to tell if the photo was taken in landscape or portrait?

我会假设一个摄像头都需要一个加速度首先要甚至告诉什么方向了......正确的？假设有那样的智慧来检测倾斜的角度，我将如何去阅读这些信息从一个JPEG？

I would assume a camera would need an accelerometer first of all to even tell what direction is up...correct? Assuming there is that kind of intelligence to detect the angle of tilt, how would I go about reading that info from a JPEG?

我发现了一些样品在线阅读用VB元/ .NET不知道读什么书找到我需要的信息。

I found some samples online to read metadata with vb/.net not sure what to read to find the info i need.

鸭preciate任何指针.....

Appreciate any pointers.....

推荐答案

这个项目应该做你想要的：

This project should do what you want:

<一个href="http://www.$c$cproject.com/KB/graphics/exifextractor.aspx">http://www.$c$cproject.com/KB/graphics/exifextractor.aspx

和这家伙已经有了一个实现：

And this guy already has an implementation:

<一个href="http://dotmac.rationalmind.net/2009/08/correct-photo-orientation-using-exif/">http://dotmac.rationalmind.net/2009/08/correct-photo-orientation-using-exif/

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