Talk:Clipping (photography)

Merging

Perhaps Highlight (photography) is about the very same thing. Mikael Häggström (talk) 08:15, 30 September 2008 (UTC)

Definitely. So why did you start the other article? I've redirected it to here; feel free to bring any additional content to here. Dicklyon (talk) 15:05, 30 September 2008 (UTC)

A highlight in photography is not the same as clipping. Clipping is an undesirable side effect of a digital sampling or digital signal processing procedure where the signal exceeds the range of values that may be represented by the digital signal. That is, a digital representation of an image will contain one or more colour channels, each one having a defined minimum (zero) value and a maximum value. If the colour in that channel goes outside this range, it will be clipped, losing any detail in the clipped area. ...

The highlights in a photo is a general term for the brightest areas of the photo, in any colour channel. ...

Such clipping may occur if the highlights in an image are too bright for whatever sampling settings, or filter, is being used, but this is not the only cause of clipping. Clipping may also occur when the black level is set incorrectly in a filter and a channel becomes 'darker than black', which can happen, for example, when increasing image contrast in some filters. It may also occur when performing a colour space conversion of the image, and a colour is too saturated to be represented in the target colour space without clipping one of the channels (typically sending a channel into 'darker than black' territory causing it to be clipped to black. mmj (talk) 06:06, 6 January 2009 (UTC)

The short article that I converted to a redirect here was primarily on the concept of "blown highlights," or clippping. I agree with you that highlights could be a topic on its own, though it's pretty narrow. And yes there are more kinds of clipping. Feel free to work on your ideas. Dicklyon (talk) 06:23, 6 January 2009 (UTC)

I've added some more to this article now. I've mostly treated 'clipping' as distinct to the way blown highlights exist in the analog world, with clipping being distinguished by an abrupt limiting rather than a gentle tail-off. Feel free to change scope mmj (talk) 07:20, 6 January 2009 (UTC)

Clipping in digital video

Clipping in digital video is the same principal as in digital photography - should this article be expanded to cover video as well? It may be noteworthy that the range of intensities which can be recorded in some types of video include 'below zero' values - ie the video signal allows for 'blacker than black' colors which are physically impossible to see on properly adjusted equipment but which may come in useful, for example to help calibrate the 'black level' in a display. mmj (talk) 03:08, 7 January 2009 (UTC)

Yes, that would be good. Part of the reason why we've tagged this for the Film project is because clipping is as much an issue in filmmaking. (If not more - motion introduces additional clipping artifacts which stills may not.) Girolamo Savonarola (talk) 03:44, 7 January 2009 (UTC)

Would that involve renaming this article to from Clipping (photography) to something like Clipping (photography and video)? What do you think? I must admit I'm not really familiar with the process of renaming an article here. mmj (talk) 04:50, 14 January 2009 (UTC)

Inaccurate statement

In the article under *Clipping due to overexposure* there is the following inaccurate statement:

Clipping can often occur in image highlights as a result of an incorrect exposure when initially photographing or scanning to a digital image. Increasing an exposure increases the intensity of light, and increasing it too far will cause the lightest areas, such as the sky, or light sources, to clip.

Increasing an exposure does not increase the intensity of light (energy per area per time) as that is set by the sources. Increasing an exposure increases the sensitivity of the film, slide, or sensor to light, and increasing it too far will cause the lightest areas to clip. I recommend updating, and will do so if there are no objections. —Preceding unsigned comment added by 128.120.179.197 (talk) 19:44, 31 October 2009 (UTC)