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Sharpen plug-in

This is a standard Unsharp Mask tool for sharpening the details of an image.

screenshot goes here

This page is correct for the following stable versions of Darktable

  • v1.0.3
  • v1.0
  • v0.93

Reasons for use

The Sharpen plug-in is used to raise the apparent sharpness of your photos.

What this plug-in actually does

An unsharp mask raises the contrast of the fine details in the image and thus sharpens it.

With specific settings an unsharp mask can also be used to enhance local contrast, but losing it's sharpening qualities # . DT has other tools designed to enhance local contrast, like the Equalizer Plug-in.

Parameters and settings that can be changed

(TODO)

The following [parameters/settings] can be changed within this plug-in:

  • AAAAAAAA
  • BBBBBBBB
  • CCCCCCCC
  • DDDDDDDD

AAAAAAAA

This parameter is represented by a [slider/graphics box/whatever....] and can be found in the [right/left]-hand panel of the [import/Lighttable/Darkroom/export - delete as appropriate] view.
Settings range from [0 to 100] where 0 shows/changes .... and where 100 shows/changes...

BBBBBBBB

This parameter is represented by a [slider/graphics box/whatever....] and can be found in the [right/left]-hand panel of the [import/Lighttable/Darkroom/export - delete as appropriate] view.
Settings range from [0 to 100] where 0 shows/changes .... and where 100 shows/changes...

CCCCCCCC

This parameter is represented by a [slider/graphics box/whatever....] and can be found in the [right/left]-hand panel of the [import/Lighttable/Darkroom/export - delete as appropriate] view.
Settings range from [0 to 100] where 0 shows/changes .... and where 100 shows/changes...

DDDDDDDD

This parameter is represented by a [slider/graphics box/whatever....] and can be found in the [right/left]-hand panel of the [import/Lighttable/Darkroom/export - delete as appropriate] view.
Settings range from [0 to 100] where 0 shows/changes .... and where 100 shows/changes...

Generally recommended settings for this plug-in

(TODO)

Whilst users may choose any settings they wish to create the look that they desire, the following settings are generally recommended for this plug-in.

Parameter AAAAAAAA

Useful settings generally range from [25 to 75]. Lower values can lead to... and higher values will lead to....

Parameter BBBBBBBB

Useful settings generally range from [25 to 75]. Lower values can lead to... and higher values will lead to....

Parameter CCCCCCCC

Useful settings generally range from [25 to 75]. Lower values can lead to... and higher values will lead to....

Parameter DDDDDDDD

Useful settings generally range from [25 to 75]. Lower values can lead to... and higher values will lead to....

[Other general comments about the parameters and their use (either alone, or in combination with one another)]

Example usage

(TODO)

Example 1

The Sharpen plug-in allows you to [manipulate/adjust/enhance/reduce/maximise/minimise/remove - delete as appropriate] VVVVVVVVVV to ....

In this example, you can see how the Sharpen plug-in [manipulates/adjusts/enhances/reduces/maximises/minimises/removes] ZZZZZZZZ and allows ....

Before photo screenshot - insert screenshot here
[Explanation of the original photo and what is hoped to improve/change]

Parameters used/suggested screenshot - insert screenshot here
[Explanation of the parameters used, and why - focusing on the reasons for using the values that you did.]

After photo screenshot to show changes - insert screenshot here
[Explanation of the photo following plug-in improvements and what has improved/changed]

NB.[Important to ensure that the before and after screenshots show only the effect of this plug-in, not a combination of other unspecified plug-ins or a stack of other adjustments. This example should focus on just the changes and improvements that can be achieved through the use of this plug-in. DELETE THIS TEXT ONCE THE EXAMPLE IS CREATED]

Example 2

The Sharpen plug-in allows you to [manipulate/adjust/enhance/reduce/maximise/minimise/remove - delete as appropriate] VVVVVVVVVV to ....

In this example, you can see how the Sharpen plug-in [manipulates/adjusts/enhances/reduces/maximises/minimises/removes] ZZZZZZZZ and allows ....

Before photo screenshot - insert screenshot here
[Explanation of the original photo and what is hoped to improve/change]

Parameters used/suggested screenshot - insert screenshot here
[Explanation of the parameters used, and why - focusing on the reasons for using the values that you did.]

After photo screenshot to show changes - insert screenshot here
[Explanation of the photo following plug-in improvements and what has improved/changed]

NB.[Important to ensure that the before and after screenshots show only the effect of this plug-in, not a combination of other unspecified plug-ins or a stack of other adjustments. This example should focus on just the changes and improvements that can be achieved through the use of this plug-in. DELETE THIS TEXT ONCE THE EXAMPLE IS CREATED]

[Insert other examples as required]

Caveats

(TODO)

[Input any warnings about using this plug-in in conjunction with others that may negatively affect it, or where you should choose to use either this plug-in or another, but not both - or delete this line.]

[Input any details about how extreme settings may affect the photos - or delete this line.]

[None]

See also

Darktable book [link to static generic 'current version' page]

Darktable's online manual - Sharpen

Relevant Blog entries concerning this plugin
  • [None currently available/Insert links here]
Online tutorials showing how to use this plug-in
  • [None currently available/Insert links here]
Online videos showing this plug-in in action
  • None currently available/Insert links here]

Wikipedia: Unsharp Mask

Source code

Also available in: PDF HTML TXT