How to create HDR images using opencv

Question

I am using opencv 3.0 version which has support for creating HDR images and trying to produce an HDR image using three images at different exposure. And i found this tutorial of opencv.

http://docs.opencv.org/master/d3/db7/tutorial_hdr_imaging.html#gsc.tab=0

Its easy to understand but it takes paramter like exposure times for images. How do i will get this exposure time ? I have only images. Do any one has tried it already ?

Thanks

I have just clicked those images from my mobile, Is there any way i can get the metadata ? — Javed, Sep 04 '15 at 22:20
So how can get that, using images ? or some other way ? can i use opencv to get the information ? — Javed, Sep 04 '15 at 22:28
You need to have the exposure times. Make sure ISO is constant on your camera and set the exposure time manually for each shot. — Dickson, Apr 19 '16 at 09:03

Kapila · Answer 1 · 2016-09-16T03:33:11.537

-2

Image exposure time is in EXIF data. In the explorer window right click the image, go to properties, you will see some of the EXIF data including exposure time if the image has that data.

or you can write a program to extract metadata to a txt file. I used python exifread() to read exposure time. https://pypi.python.org/pypi/ExifRead

edited Sep 16 '16 at 03:33

answered Sep 15 '16 at 02:06

Kapila

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How to create HDR images using opencv

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