Dictionary » C » Characteristic curve

Characteristic curve



A graph in which the density of the photographic film (vertical axis) is plotted against the logarithm of the relative exposure (horizontal axis), to illustrate the photographic characteristics of an emulsion (e.g. on an x-ray film).


A characteristic curve depicts and measures the relationship between exposure and photographic density. It is used to describe the contrast characteristics of a photographic film for a particular range of exposure. The exposure needed to produce an image is also determined.

It is also called Hurter and Driffield curve (or H & D curve), named after Ferdinand Hurter and Vero Charles Driffield who first developed it.

Also called:

Please contribute to this project, if you have more information about this term feel free to edit this page

Results from our forum

Re: The Genie and the Bottle; When a Genotype is not a Genotype

Trait: trait A qualitative characteristic; a discrete attribute as contrasted with metrical character. A trait ... Related forms: characteristically (adverb) Related terms: Characteristic curve Characteristic radiation A trait is a qualitative characteristic. A characteristic ...

See entire post
by Crucible
Sun Oct 23, 2011 9:41 pm
Forum: Evolution
Topic: The Genie and the Bottle; When a Genotype is not a Genotype
Replies: 6
Views: 5807

GraphPad Prism

... control samples from this file. The standards data are used to form a characteristic or standard curve which may be modeled using a three point cubic spline or a four parameter logistic-log ...

See entire post
by CoffeaRobusta
Tue Apr 10, 2007 2:31 pm
Forum: General Discussion
Topic: GraphPad Prism
Replies: 8
Views: 9996

passage number in mammalian cells

It all depends on the cells and the characteristic you are studying. Some cells (Hek293 ) can be passaged many many times, ... Did you have that data published anywhere? if not, did you guys have a decay curve that you would care to share? I too am using these cells and am looking at a ...

See entire post
by lpojoga
Tue Feb 20, 2007 8:00 pm
Forum: Cell Biology
Topic: passage number in mammalian cells
Replies: 5
Views: 4781

The Fiber Disease

... capability will cause a change in the fluorescence induction curve, with resultant changes in the quantum yield of fluorescence. As described ... antagonists combined with specific algae or cyanobacteria will cause characteristic changes that can be used to construct a look-up library or ...

See entire post
by London
Wed Aug 16, 2006 4:40 am
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5560739

This page was last modified 05:11, 23 June 2009. This page has been accessed 1,840 times. 
What links here | Related changes | Permanent link