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View Full Version : How does a Wave form monitor work?



Ervani
07-23-2013, 09:01 PM
I'm writing in a series on my website and started with the first steps in color corection and grading for newbies. The article is in Dutch but you can use the intergrated translation tool at the right side of the site: http://www.hdslr35.com/kleurcorrectie-deel-1/

Ervani
07-23-2013, 09:22 PM
http://www.hdslr35.com/wp-content/uploads/2013/07/kleur1.jpg

http://www.hdslr35.com/wp-content/uploads/2013/07/kleur2.jpg

http://www.hdslr35.com/wp-content/uploads/2013/07/kleur3.jpg

http://www.hdslr35.com/wp-content/uploads/2013/07/kleur4.jpg

Etc. Etc.

nickjbedford
11-17-2013, 05:13 PM
X Axis: each column of pixels across the frame
Y Axis: pixel luminance throughout the column of pixels is mapped onto the vertical axis. Bright pixels at the top, dark pixels at the bottom.

Dense areas describe areas of the image where many pixels have similar luminance, such as the large portion of sky in the frame.

The more contrasty and varying the frame, the less dense and more spread out the waveform will be.

rob baynard
11-22-2013, 01:38 AM
Nick has some good points. I always like to have a waveform on set if possible to ensure you are not blowing out or crushing any information you want to keep. But, I always have a waveform out when editing and/or shot matching. Read your waveform left to right and know that you are looking at luminance values in your frame. RGB waveforms tell you exactly where your colors are in the frame.

The waveform can be thought of as Ansel Adams zone system with 10 being pure white (100%) and 0 being pure black (0%). The most important thing to know is that skin tones can be anywhere from 40-70% based on ethnicity. For example, just because your skin tone is at 40%, doesn't mean it's underexposed. A dark skinned person can easily show up in the 40-50 range, whereas a pale skinned person will likely be in the 60-70% range when properly exposed. Waveforms are invaluable tools and should be used in every project and edit.