Join Ben Long for an in-depth discussion in this video Image sensor and shadows, part of HDR Photography: Shooting and Processing.
Here is a weird one.…If the amount of light in this room is doubled, I do not actually perceive a…doubling of light. I perceive less than that.…All your senses work this way actually.…If someone hands me a bowling ball and then they hand me a second bowling ball, …I'll probably think, "I really wish this personal will stop handling me bowling balls."…Then I might actually realize that I'm not experiencing a doubling in weight.…Our senses are nonlinear.…That is my sense of brightness does not follow perfect doublings. My sense of…brightness increases on a curve.…
Now don't worry too much about understanding that.…The practical upshot of it is that we end up with a very good ability to see…detail in bright highlights and dark shadows.…The image sensor in your camera though captures light in a linear fashion.…If you double the amount of light, the image sensor records a doubling of brightness.…This has a curious effect on image capture and it goes like this.…Let's say my camera can capture 4,096 different shades or tones.…
- Understanding how the image sensor detects shadows
- Capturing a broader dynamic range
- Knowing when to use HDR
- Finding good HDR subject matter
- Using gradient masks to improve dynamic range
- Merging in Photoshop and processing elsewhere
- Dealing with ghosting
- Reducing noise and correcting chromatic aberrations
- Handling HDR images that seem flat
- Combining HDR and LDR (low dynamic range)
- Selective editing with HDR Efex Pro
- Creating panoramic HDR images
- Creating an HDR time lapse
Skill Level Intermediate
Photoshop CS5: Landscape Photographywith Ben Long6h 42m Intermediate
Photoshop CS5 One-on-One: Masterywith Deke McClelland20h 1m Advanced
2. What Is HDR?
3. Shooting and Organizing HDR
4. Expanding Dynamic Range Through Masking
5. Processing Multi-Shot HDR Images in Photoshop CS5
6. Additional Retouching and Finishing
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