SLIDE 1
The Art, Science and Algorithms
- f Photography!
Finish Basic Photography General Workflow! CSCI 4900/6900! Maria Hybinette!
1!
Outline!
Conclude basic photography, general workflow.!
- Take the Shot!
- Post processing, rule of thumb (white balance)!
- Print, post your shots on the web (general,
guidelines)!
- More about the zone system!
- Odds & Ends!
Next week:! !Start with : Camera hacking begin! !More advanced topics (sensor limitations, color theory, lens choice).!
2!
- 1. Basic Workflow (Natural light)!
- Visualize your shot (portraits), planning!
- Context, background, clothing.!
- Best light: Golden hour, 1 hour: after/before sun!
- Exposure, rule of thumb:!
– ISO: Low ISO (less noise, higher dynamic range).! – Depth of field (isolate your subject? or story telling?! – Shutter for correct exposure.! – Zone system (more shortly) maximize dynamic range!
- White Balance (in camera, reduces post processing,
but in general can be fixed later). !!
- Take the shot, evaluate, re-take the shot!
3!
- 2. Basic Workflow: Raw Editing!
- Shoot in RAW (we will talk about JPG vs RAW shortly)!
– Easier, improves dynamic range! – Easier to post process, less artifacts, higher qualiy! – Later: sensors are linear devices, vision isn’t we will talked about and visualize:!
- Photons: Twice the light – twice the voltage linear!
- Vision: How exposure works and vision logarithmic !
- Do RAW adjustments (lower contrast, correct white
balance, exposure compensation (clippings), make sure you retain details – shadow, highlight recovery, careful with brightness / black point / contrast sliders). !
– Goal: maximize dynamic range & retain the details.! – Works on linear data (discuss this more later)!
- Go into photoshop (applies a gamma curve, locks RGB
values).!
4!
- 3. Basic Workflow: Photoshop Edit!
- Remove noise (plug-ins?) – (talk about this later)!
– Some people do this later! – Noise removal in LAB space!
- Remove Color casts (today)!
- Add contrast, color enhancement!
- Save!
- Sharpen!
- Crop!
- Publish!
5!
White Balance (Global)!
- Correct in ACR/Lightroom !
– Easy!
- Photoshop!
– Color info / Color ! – LAB (easy to monitor neutrals)! – Levels (yellow family)! – Color balance (yellow family)! – Curves (black point, medium grey, white point)! – Grey fill layers to find medium grey!
- Difference blending mode!
– Darkest areas are the most similar !! » Eye, Treshold!
6!