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Correcting for under exposure

Author Message
Rjmiz
383 posts
Message posted at 03/19/2007, 03:27:24 AM by Rjmiz
Recently someone asked be how to prevent blown out highlights. Especially if your shooting INTO Sunlight. I really don't have a right or wrong answer, but I told hime what I do: I expose for the Sun.



The reason being I don't want blown highlights. Once the highlights are blown out, all information is lost and CAN NOT be recovered. I can however, recover information in an image that is UNDER EXPOSED.



So here is a RAW image taken with my camera. The image below that is processed in photoshop to recover the underexposed information in the lighthouse. I will not go into details, but my method involves the extensive use of masking, and blending.



Now, I realize that I have just about added an entirely new sky, howver I also have a third version with the original sky that is not blown out because I exposed for the sky, rather than the building.



In this age of digital imaging, some of the film techniques for handling this situation, are unnecessary when you use photoshop.



Any questions?



 Dreamstime generic image 



 Image not available or id is incorrect. 
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Afagundes
3245 posts
<10
Message posted at 03/19/2007, 03:59:23 AM by Afagundes
Rjmiz,

And what about the contrast?

New techniques using photoshop can fix the under exposure, but backlit pictures like yours allways lack of contrast, have you found a solution?
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Rjmiz
383 posts
Message edited at 03/19/2007, 04:37:32 AM by Rjmiz
Well all you need to do is lighten things up. Its that simple.....right?

here is another sample slightly lighter. (just the lighthouse) However, remember I'm trying to capture a "mood" here.



Brighten it up too much, and it looses the mood of the Sunset.



 Image not available or id is incorrect. 



Or I could use another PS adjustment called "Match Color" and get this



 Image not available or id is incorrect. 



But, you asked for contrast? You got it! Want anything else?....just ask

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Orchidpoet
264 posts
Message posted at 03/26/2007, 23:15:26 PM by Orchidpoet
I personally like the last one the best, I like the impact.



But, will DT accept it? Some of my shots were rejected for being "over-filtered". Will the last one be considered as "over-filtered"?



Thanks.





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Rjmiz
383 posts
Message posted at 03/27/2007, 08:48:16 AM by Rjmiz
There was not one filter used in the making of that image
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Orchidpoet
264 posts
Message posted at 03/27/2007, 10:15:13 AM by Orchidpoet
True, but that was the term used by the DT's reviewer and I just couldn't figure it out, because I didn't use any filter either.



What about "over-saturation"? Which image you think is the best among all of the samples?



Thanks.







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Lightart
1314 posts
56
Message posted at 03/27/2007, 11:49:18 AM by Lightart
Good info - and good job on the examples.
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Jonnyreb
74 posts
<10
Message posted at 03/28/2007, 07:30:13 AM by Jonnyreb
I used levels to change my picture and Dreamstime said it was overfiltered. I didn't have a filter on my camera so I too am wondering.

I have a question. Do you use levels or do you use brightness and contrast in PS? Thanks for posting this. Gabe


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Stuartkey
1282 posts
80
Message posted at 03/28/2007, 08:09:43 AM by Stuartkey
The term 'over-filtered' when used in a rejection does not necessarily mean that any filters were used when the image was shot, but rather that it has been over-filtered in post processing, whether that be by the use of Levels in Photoshop, too much saturation, over-sharpening, etc. etc.



It is very easy to be too heavy handed with the adjustments in image editing software and begin to lose detail in either the highlights or shadows, as Rjmiz mentioned in his original post.



It may help to keep a copy of the original image from the camera, and compare your retouched version with the original before submitting it. This should help to pick up any areas where you may have 'over-filtered' the image and lost detail or quality.





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78
Message posted at 03/28/2007, 10:21:56 AM by Littlemacproductions
I find in processing such as in the example provided, the use of multiple layers applied with a light hand bypasses the 'over filtered' image processing description. MIZ is that what you do?
Two brown eyes and an open mind.

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Lightart
1314 posts
56
Message posted at 03/28/2007, 10:30:43 AM by Lightart

Originally posted by Jonnyreb:
Quoted Message: . . . Do you use levels or do you use brightness and contrast in PS? Thanks for posting this. Gabe




I don't see that anyone addressed this question and if they did then disregard. . but I NEVER use the brightness contrast controls in Photoshop. They have a tendency to either wash out your photo or simply make it too contrasty. Use levels and/or curves instead. You'll have a much more subtle and graduated control of your image adjustments. There are some great tutorials by Scott Kelby and a fellow named Martin Evening "Adobe Photoshop for Photographers" that you can read that will provide you with some advanced techniques for manipulatating your images in Photoshop.
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