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Is there a a function/code which can make the darker bits darker and the lighter bits lighter?

2 visualizzazioni (ultimi 30 giorni)
just a random image I found on google. Is it possible to make the black parts (crack) darker and the background (concrete) lighter?

Risposte (3)

Matz Johansson Bergström
Matz Johansson Bergström il 21 Ago 2014
If you have the image processing toolbox you can use imcontrast.

Iain il 21 Ago 2014
Calculate the difference from the image's mid level (128 probably, but this depends on how you're dealing with the image), and multiply it by a number greater than 1. Add that difference back to the mid level.
  2 Commenti
Iain il 22 Ago 2014
Adjusted_Contrast = (Image - meanlevel) * scale;
Adjusted_Image = meanlevel + Adjusted_Contrast;
You need to change data types & values of mean level & scale, as you need.

Accedi per commentare.

Image Analyst
Image Analyst il 22 Ago 2014
You can use imadjust() or just pass in the range you want to see into imshow().

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