Questions tagged [exposure-correction]

Exposure Correction

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14
votes
6answers
2k views

Could a “universal exposure” setting be practically possible?

Not sure how uneducated this question is, but I'm interested in learning, so thanks in advance for your indulgence. Film physically changes over the period of time it's exposed. A digital sensor, ...
8
votes
3answers
936 views

Can spot metering be corrected in post processing?

I just started experimenting with spot metering + exposure compensation. I'm wondering if it's possible to make adjustments during post processing to correct the metering. I'm pretty sure (correct me ...
7
votes
4answers
2k views

How to correct photos which were overexposed at the edges only?

I'm dealing with a set of photos where a model was photographed against a white backdrop. The problem is that due to the setup, way too much light reflected off the backdrop. So the model's face (for ...
4
votes
3answers
2k views

How does software exposure compensation work in RAW files?

When shooting with RAW files, it is possible to tune the exposure and white balance using software, which is not possible when shooting with JPEG. But I have a stupid question: when you are shooting ...
4
votes
2answers
1k views

How to fix the exposure of a snow scene which came out gray?

I’ve got a video and a photo shot in the same day and same place. But my camera (GoPro Hero 3, 720p) doesn’t allow to customise settings and video is very poor quality. I tried to fix this using ...
4
votes
4answers
4k views

How to correct exposure locally with Apple Aperture?

I have a question about using Aperture on OS X. I have taken a RAW picture (made with a K-5) of an arcade machine. While most of its surrounding is fairly well exposed, the lit areas are overexposed (...
3
votes
2answers
785 views

Why does the exposure vary in these Nikon flash photos?

The following 4 photos were all taken with a Nikon D300 at 1/250s, f/5.3, ISO-400, in shutter priority mode, with the on-camera pop-up flash. The only difference between them is the exposure bias, ...
3
votes
2answers
154 views

Method to balance very minor exposure changes over time?

Has anyone found an application for correcting extremely minor exposure changes over the course of a time-lapse? These are like +/- up to 0.05 EV or so changes, and they're pretty random in sequence, ...
3
votes
2answers
1k views

How can I undo Canon Auto Lighting Optimizer in Lightroom?

I was shooting in RAW in the Tv mode with my Canon's Auto Lighting Optimizer set to Standard. I understand this is one of the settings that, even when you shoot in RAW, will correct your image's ...
3
votes
3answers
27k views

How to correct yellowish pictures under fluorescent lighting on a digital camera?

What can I do about some of my pictures turning yellowish under fluorescent lights - I can not turn the lights off - judo lessons for my grandson in school gym. I am using the Canon Rebel XSI (450D) ...
3
votes
2answers
786 views

What is the difference between an exposure slider and a levels slider?

One of the first things many postprocessing tutorials teach is to adjust the levels in a raster image editor, so the histogram uses the whole possible range. In my RAW editor (Darktable), there wasn't ...
2
votes
3answers
959 views

In-Camera Bracketing vs Exposure Correction in DPP

Is there any difference in images produced using in-camera bracketing (-2,0,+2) and images produced using exposure correction (-2,0,+2) from RAW images in DPP? I'll be traveling tomorrow to a place ...
2
votes
3answers
2k views

Are the terms 'push' and 'pull' relevant/applicable to digital photography?

The terms push and pull come from the days of film processing, and there's more on that here and here, but essentially they refer to increasing or decreasing the chemical processing time to account ...
2
votes
2answers
98 views

How to programatically adjust exposure based on image metadata?

As part of a photogrammetry project, I took a number of photos (in NEF RAW format) of an object using manual settings on a D800. However, I forgot to turn off auto-iso (argh!). So, all my photos ...
2
votes
4answers
179 views

Exposure correction for a portion of an image

I have a photograph that was taken on stage in a theater. The photo was taken with a Nikon D3100 camera with flash in auto mode and stored as both raw (.NEF) and jpeg file. Because spotlights were ...
1
vote
4answers
247 views

How can I get the exposure correct in this picture?

I am new to photography; I have a Canon 600D. The shot below was taken using the 600D and EF-S 18-55 kit lens. I wanted to get the exposure so that the leaves on the big tree came out right, ...
1
vote
1answer
79 views

Post-processing goal: three different exposures?

I took a photo yesterday on Roan Mountain, on the AT. In the foreground is an overgrown meadow. Midground is a nearby mountain, dark in contrast with the sun setting just over it. In the background, ...
0
votes
2answers
181 views

What is the formula to calculate aperture (“diaphragme” in French)?

Let's say I have these data for my camera: t : Exposure time in seconds ("temps de pose" in French) C : Incident-light meter calibration constant ("constante lumière incidente" in French) S : ISO ...
0
votes
1answer
525 views

why exposing with 18% gray card does not give IRE near 40?

I am trying to understand how to get perfect exposure using gray card. With my Sony a6500 using ITU709 gamma, I locked exposure by doing spot metering on the gray card. When importing in final cut pro ...
0
votes
2answers
615 views

Is light fall off corrected for in modern cameras?

Because of the way light is projected in a camera the image can be darkened near the edges. My questions is, do modern cameras attempt to correct for this light fall off? Description of the light ...
0
votes
2answers
178 views

Exposure compensation after images are taken

I have a stack of image tiles (taken from a drone) that I want to mosaic to a single image. I want to do exposure compensation to reduce the variation in illumination between the image tiles before ...
0
votes
1answer
81 views

Change exposure settings while shooting with intervalometer

I own a Canon 77D camera with built-in intervalometer. I can set the interval in seconds between shots and set it to either shoot indefinitely or a fixed amount of shots. When I shoot the sunrise or ...
-1
votes
3answers
109 views

Mathematical definition of EV on a RAW photo? [duplicate]

I'm trying to write a program that takes in a matrix full of 12-bit RAW sensor values (that range from [512-4096]) (512 is the BAYER sensor black level--> i.e. what pure black is defined as) and ...
-1
votes
1answer
151 views

Can I save extremely washed out images in post-production?

I shot a ton of pics today, and trying out Auto vs Aperture settings on my D5200, I did not realize that the ISO was set to the outrageous number it was. I got home to find that about 1/2 the shots I ...