Interior photo with muddy corners and a white window
You are retouching a 24 MP interior photograph for an estate agent. The room is well exposed in the middle, but the corners are muddy and dark, and the window is pure white with no detail left. The agent also wants the image to look crisper for the listing. A colleague suggests this order: apply Brightness/Contrast, then Sharpen, then reduce noise, then crop - all directly on the background layer, saving as JPEG after each step so the file is always ready to send.
1. Critique the colleague's workflow. List the problems and give a corrected order of operations.
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Problems with the proposed workflow:
- Destructive: every edit is applied to the background layer, so nothing can be tuned or undone later without starting over.
- Repeated JPEG saves compound lossy compression and degrade gradients and edges each time.
- Sharpen before noise reduction amplifies the grain and then the noise filter smears the sharpened detail - the two fight each other.
- Brightness/Contrast is a blunt global tool; lifting the whole frame to fix the corners will push the already-blown window further out.
Corrected order:
- Work on a copy; keep the original untouched. If a RAW file exists, start there in 16-bit.
- Recover highlights first - check whether window detail exists in the RAW; if it is clipped, source a second exposure.
- Tone and colour with adjustment layers (Curves/Levels) masked to the corners only.
- Noise reduction on the shadows.
- Retouch/clean-up (healing, cloning) on a separate layer.
- Crop and resample to final size.
- Output sharpening last, on a duplicate, at final dimensions.
- Save the master as PSD/TIFF; export JPEG once per output.
2. The agent wants the window detail back. How do you decide whether it is recoverable, and what do you do if it is not?
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Check the histogram and the file format. If the window is a flat blown area in an 8-bit JPEG, the pixels are all 255 - the information does not exist and no slider brings it back. If there is a RAW file, pull the Highlight/Exposure slider down: often 1-2 stops of recoverable data sits above what the JPEG preview showed.
If it is genuinely clipped:
- Composite a second exposure of the window (same framing, tripod, exposed for the outside) as a separate layer and blend it in with a soft-edged mask.
- Failing that, mask the window area and leave it near-white but slightly off-pure-white so it reads as bright daylight rather than a hole. A subtle warm tint plus slight texture reads more naturally than 255,255,255.
- Do not try to paint detail in; mismatched tone in a window is obvious to buyers.
Masking is essential: any global exposure lift to save the corners will blow the window further and lift the midtones the agent is happy with.
3. Explain where sharpening belongs in this job and why the order matters more than the amount.
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Sharpening is an output-stage step, not a repair step:
- It should be applied after cropping and resampling to final size, because a radius tuned for 24 MP becomes an ugly halo once the image is downsampled for the web listing.
- It should come after noise reduction, because sharpening first magnifies the grain, and the noise filter then smears the edge contrast you just created.
- It should be applied on a duplicate layer so it can be reduced or masked away from smooth areas like walls and skies.
Practically: modest amount with a small radius (around 0.5-1 px) for screen output, and mask out flat areas. The listing needs two versions anyway - a sharpened web JPEG at around 1600 px and a softer, higher-resolution master - so sharpening is done twice at different settings, never once and reused.