How to create image service that can be pansharpened

[tongkimongki]

Hi,

how do you create a service that can be pansharpened on the fly ? I have succesfully created a pansharpened-image-service (the service itself is already pansharpened) but i am not able to create a service that can be pansharpened.

Thankyou 😞

[larryzhang]

We are also in learning curve, but would like to share our practice with you.

First of all, as necessary steps for pansharpening individually or as a batch, 'Add Rasters' & 'Raster Properties' configuration will be involved . You can refer to the document at http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009t0000003r000000.htm
and http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Raster_type_properties/009t0000003t000...

Secondly, with GeoEye sources, one snapshot of 'Raster Properties' configurations (including pansharpen options) is attached as an example, which is different from the default.

With this configuration, we basically mimic the current imagery processing workflow (like natural color RGB), and  will also have operational flexibility in next several steps to enhance mosaic dataset; for example, to make use of the existing or historical 'manually-processed 3-band reference images' as color target during 'color correction'. In fact, it will also minimize many imagery histogram variations in very-high-resolution images (no stretches at all) during building histogram statistics.  Honestly, we are still exploring how to fully use the 4th near-infra band, so that we can enhance vegetations but still be able to ensure no more image histogram variations created.

For sure, we also would like to have ESRI advice on above configuration, especially, band weights, when choosing bands combination 321 in 'Sharpen' or 'Sharpen More' mode.

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PS.,

Owing to huge histogram variations in very-high-resolution images, it is very hard for the computer system to conduct completely automatic color correction, in order to prduce good color-balanced mosaic in practice. Also, it is not flexible to meet different customers�?? subjective needs in color, if only using automatic color correction.

So, in addition to 'color target' algorithm in 'color correction' tool, a more efficient and flexible tool like �??histogram adjustment�?? application may be required somewhere, in order to manually adjust individual image histogram to match the overall and desired color (after automatic color correction and before finalizing mosiac dataset.)

[tongkimongki]

thanks for replying Zhang,

I forgot to mention that i am using arcgis server 9.3 with image server extension...

I just found out that you can pansharpen 2 image services, 1 service for multispectral and 1 for panchromatic, using ArcGIS 10. Use the Image Analysis Tool to pansharpen these 2 services. this cant be done in ArcGIS 9.3.X...

Please correct me if iam wrong...

thanks

[larryzhang]

You can directly use 'Applying the Pan-sharpen process to an image service definition' (http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?id=3263&pid=3249&topicname=using_the_pan-sharpen...) for agis server 9.3/9.3.1.  It works well for a single xs image (or color-balanced xs mosaic) and single pan image (or color-balanced pan mosaic). However, if planning to use this way for massive unprocessed images, it is not practical because 'color correction' and 'geometric correction' are very limited, or not available at all in Image Service Editor'.

Regarding ESRI Image Analysis, two comments are for your reference:

�?� it is an efficient and productive application, but only available in ArcGIS 10;
�?� the pan-sharpened 'image' (via ESRI Image Analysis) is going to your local temp folder; [Personally, some day, all those derived & temporary 'imagery products' from Image Analysis can be easily transferred and served again for ArcGIS Server 10.]

So, if really planning to use this pan-sharpened 'temp image' for ArcGIS Server 9.3/9.3.1, you need efficiently to make it permanent (even 'export' works somehow, but not effectively, mostly not work at all for larger imagery like 100 GB). If succeeded, two ways can be chose to serve for ArcGIS Server 9.3/9.3.1:

�?� create an image service definition file with this pan-sharpened image by Image Service Editor and allow agis Server 9.3.1 to access & manage it as an image service;
�?� directly serve it as a file (IMG, TIFF) into ArcGIS Server 9.3/9.3.1

From operational perspective, the first one is flexible and manageable, which allows us conveniently to manage plenty of image resources and easily create large image service definition files in data center, mostly apart from the machines hosting agis Server.

[JeffreySwain]

It is an Image Analysis Window, and it is a new window for ArcGIS 10.  You should be able to activate the Window under the Window Menu.