1 reply to this topic

[Richard J]

Good-day to all,

After month's of learning off the great people here on CartoTalk, I have decided to join and hopefully offer my limited experience/knowledge when suitable.

I am wondering if somebody could provide guidance for matching histograms - contrast between two 10m SPOT panchromatic images?. I have tried in Photoshop with limited success, maybe require dedicated remote sensing software solution?

My hobby project is to produce a raster map which shows land cover data merged with a decent resolution satellite image. This is also draped over a shaded relief DEM. Problem is that the contrast values between the SPOT images does not match. So if I blend/overlay, for example, a dense conifer polygon (colourized) over the image the brightness varies from one image to the other.

Tools I have: Global Mapper, Geographic Imager, Photoshop.

Thank-you

Richard

[frax]

Hi and welcome! Unfortunately I can't help you with your question - I hope someone else here can! You might want to ask it on the (helpful) Global Mapper mailing list.