Question

87

extract exif orientation data from image

rated 0 times [ 93] [ 6] / answers: 1 / hits: 35433 / 12 Years ago, fri, january 11, 2013, 12:00:00

Possible Duplicate:

Accessing JPEG EXIF rotation data in Javascript on the client side

I'd need to extract the orientation EXIF data from an HTML JPEG image with Javascript.

according to exiftool's documentation the orientation flag is found at offset 0x112 within the EXIF marker, and occupies 2 bytes.

I guess we just need to extract the data at good offset and 'convert' the value but i don't have any idea how to achieve this in the browser. The result value should be a number between 1 and 8 describing the orientation.

How to read that data from a simple IMG tag ?
I need a webkit only solution, but browser only.

Thanks !

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

bryonk

Add To Favorites

Follow

Total Points: 161

Total Questions: 116

Total Answers: 107

Location: Albania

Member since Sun, Nov 22, 2020

4 Years ago

bryonk questions

1 What is the react query queryKey typescript type

Sat, Aug 13, 22, 00:00, 2 Years ago

1 Cannot read properties of null (reading 'addEventListener') in a Javascript file (not script tag)

Sat, Jan 15, 22, 00:00, 2 Years ago

1 Pagination in React/Typescript

Sun, May 9, 21, 00:00, 3 Years ago

1 Redirect to another page with TOKEN header through Server

Tue, Mar 16, 21, 00:00, 3 Years ago

1 What JavaScript engine does Apple's Safari browser use?

Tue, Sep 29, 20, 00:00, 4 Years ago

View All

answered 12 Years ago brianaclaras · Accepted Answer

Possible duplicate of this question.

thanks. here's the final code example to get orientation :

var b64 = data:image/jpeg;base64,/9j/4AAQSkZJRgABA......;

var bin = atob(b64.split(',')[1]);

var exif = EXIF.readFromBinaryFile(new BinaryFile(bin));

alert(exif.Orientation);