Adjust image brightness before mosaicking.

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01-27-2021 01:59 AM
RanjanSarkar
New Contributor II

I have got a few single band, greyscale rasters that I want to mosaic, but their brightness values are sharply different. Therefore, I have been trying to stretch and match the brightness levels of individual images so that they appear uniform (seamless) across all the images using Image Analysis (as suggested in here: https://community.esri.com/t5/data-management-questions/permanently-change-image-brightness/td-p/386... However, when I save the stretched images and create the mosaics (using 'mosaic to new raster'), the brightness levels do not match. I am using ArcMap 10.5.1.

Any suggestions how this can be done?

Thanks in advance,

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4 Replies
DanPatterson
MVP Frequent Contributor

Did you stretch them individually? which might make matters worse for adjacent images.

Or did you try the other suggestions>


... sort of retired...
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RanjanSarkar
New Contributor II

Hi Dan, 

Yes I had stretched them individually to the point that they all appeared seamless. Then I exported them hoping that these brightness levels are preserved, which didn't turn out to be so.

 

Thanks,

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DanPatterson
MVP Frequent Contributor

So the image analyst option didn't work then (?)


... sort of retired...
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RanjanSarkar
New Contributor II

Yes that's correct. When I mosaic these individually brightness-stretched images they seemed to go back to their original brightness values...

 

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