topic Re: Mosaic Dataset _ methods and problems in Data Management Questions

Mosaic Dataset _ methods and problems

MohammadDashti — Wed, 07 Mar 2012 08:20:09 GMT

Hi All,

I am created a mosaic of 20 Geoeye-1 images.
they are acquired over three different dates (3 to 9 months apart)

I used the following methodology to mosaic them

1- clip nodata, zero values, cloud cover, and water portions
2- mosaic images from the same date (three mosaic dataets)
3- create geodatabase
4- create new empty mosaic dataset
5- add images to the mosaic dataset
6- edit footprints
6- build and edit seamlines
7- build boundary
9- run 'color balance tool'
8- generate overview
9- export to raster

the mosaic looked acceptable but I faced the following problems.

A)when I mosaic pan-sharpened images I get very bad color balance
if the raw ms images are mosaiced the color balance is good or acceptable

B) there is a shift between some images in the mosaic. it exists in some parts and not in others.

[ATTACH=CONFIG]12469[/ATTACH]

C) when exporting the mosaic to .img, .tif other formats the image quality is reduced, and noisy image is prodcued.
some times the noise is higher at lower scales, when zooming in it is reduced.

D) pixilation occures in some parts of the image. usually from the images at the end of mosaic. these white pixels has nodata in the red band only. see the examples below.

[ATTACH=CONFIG]12470[/ATTACH]
[ATTACH=CONFIG]12471[/ATTACH]

Thanks a lot and sorry about the long post
Mohammad

Re: Mosaic Dataset _ methods and problems

MichaelNesius — Fri, 22 Nov 2013 19:13:47 GMT

I just wanted to bump this thread in the hopes that someone would see it that has some guidance.

I'm currently experiencing Problem B, displacement on some tiles in the Color Balanced image... I seem to be getting this problem when using the ArcToolbox, but not when using the Color Balance Window (this tends to lead to a 'Not Responding' ArcMap) in 10.0.

Re: Mosaic Dataset _ methods and problems

Anonymous User — Mon, 24 Feb 2014 17:32:15 GMT

Original User: ExpertUser

Hello Mohammed,

Good to see you made it through the process. Just wanted to know what version of ArcGIS you were using. The process has improved with version 10.2.1.

In kind spirit,
DIGGY

Re: Mosaic Dataset _ methods and problems

RalfSchüpferling — Tue, 03 Feb 2015 16:13:13 GMT

Hi Mohammad,

I would advice deleting raster functions before doing some Color balancing. Do you have defined Raster Functions? If you use pan-sharpened Images from the Raster Product, you should have some... The Export and Pixalation issues may belong to these functions as well. To avoid it, process pansharpened Images using the specific tool before.

The shift may belong to slightly different spatial references, it this possible?

Greetings, Ralf