topic Re: Adjust image brightness before mosaicking. in Data Management Questions

Adjust image brightness before mosaicking.

RanjanSarkar — Wed, 27 Jan 2021 09:59:13 GMT

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/386466). 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,

Re: Adjust image brightness before mosaicking.

DanPatterson — Wed, 27 Jan 2021 10:54:34 GMT

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

Or did you try the other suggestions>

Re: Adjust image brightness before mosaicking.

RanjanSarkar — Wed, 27 Jan 2021 15:22:15 GMT

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,

Re: Adjust image brightness before mosaicking.

DanPatterson — Wed, 27 Jan 2021 15:53:01 GMT

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

Re: Adjust image brightness before mosaicking.

RanjanSarkar — Wed, 27 Jan 2021 15:56:56 GMT

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