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how to change window/level of displayed image

asked 2013-03-12 05:30:08 -0500

joker gravatar image

Hi,

Default display of an arbitrary image is not always a best fit, as all grey levels are automatically displayed, image may appear as dark grey. Therefore before display, image should be "filtered" by setting to 0 all values below min val of that window, setting to max all values above that window, and re-sampling/re-interpolating all the values inside the window.

Is there any built-in function to change windowing of displayed image? If not - what function could be used prior display to apply the windowing filter above.

Thanks.

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answered 2013-03-12 05:48:23 -0500

I guess the threshold algorithms proposed here could help you out:

http://docs.opencv.org/modules/imgproc/doc/miscellaneous_transformations.html

The threshold function applied twice could do exactly what you want. Just convert your 2D image structure to a single row vector first.

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Could you explain how to do it?

Artem.s gravatar imageArtem.s ( 2015-04-23 11:01:38 -0500 )edit

There are tutorials to explain how to do it. For thresholding it is this one!

StevenPuttemans gravatar imageStevenPuttemans ( 2015-04-24 02:31:30 -0500 )edit
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Asked: 2013-03-12 05:30:08 -0500

Seen: 1,365 times

Last updated: Mar 12 '13