inquiring about histogram matching

Discussion:

(too old to reply)

2005-11-14 05:26:59 UTC

Hi Guys!
I have to mosaic two images of different seasons and
dates of Landsat satellite data. These images have a great difference
in histogram values. I want to do histogram matching and then
mosaicking of these images to get better visual appearence. I am using
ERDAS IMAGINE. Can anybody please help me to know about the tools used
in erdas imagine for histogram matching.
Thanks

Urooj Saeed

Martin Leese

2005-11-16 01:37:58 UTC

Permalink

Post by US
Hi Guys!
I have to mosaic two images of different seasons and
dates of Landsat satellite data. These images have a great difference
in histogram values. I want to do histogram matching and then
mosaicking of these images to get better visual appearence. I am using
ERDAS IMAGINE. Can anybody please help me to know about the tools used
in erdas imagine for histogram matching.

Don't know Erdas Imagine, but think carefully before
doing this. While you could make the images appear
less different (making them similar is unlikely to
be possible), the result will be of little value for
some applications, and downright misleading for
others. On the other hand, if you are just
producing a pretty picture then go ahead.

I had exactly this problem some years ago with
Landsat images of Somalia. In my case the images
were interpreted before mosaicing, and the mosaic
was used just as a pretty background for the
results. I remember that one of the images had some
cloud on it, and this ended up being bright blue
(and a long way from white).

--
Regards,
Martin Leese
E-mail: ***@see.Web.for.e-mail.INVALID
Web: http://members.tripod.com/martin_leese/

2005-11-16 09:21:08 UTC

Permalink

Hi
Thx for ur reply. I just want to show a pretty picture of mosaicked
images. So can u tell me that how u did mosaicking of Somalia.

Urooj Saeed.

Post by Martin Leese

Don't know Erdas Imagine, but think carefully before
doing this. While you could make the images appear
less different (making them similar is unlikely to
be possible), the result will be of little value for
some applications, and downright misleading for
others. On the other hand, if you are just
producing a pretty picture then go ahead.
I had exactly this problem some years ago with
Landsat images of Somalia. In my case the images
were interpreted before mosaicing, and the mosaic
was used just as a pretty background for the
results. I remember that one of the images had some
cloud on it, and this ended up being bright blue
(and a long way from white).
--
Regards,
Martin Leese
Web: http://members.tripod.com/martin_leese/

Martin Leese

2005-11-16 21:18:37 UTC

Permalink

Post by US
Hi
Thx for ur reply. I just want to show a pretty picture of mosaicked
images. So can u tell me that how u did mosaicking of Somalia.

I used my own software, not Erdas Imagine. For the
colur matching, I used histogram matching.

Post by US

Post by Martin Leese

Don't know Erdas Imagine, but think carefully before
doing this. While you could make the images appear
less different (making them similar is unlikely to
be possible), the result will be of little value for
some applications, and downright misleading for
others. On the other hand, if you are just
producing a pretty picture then go ahead.
I had exactly this problem some years ago with
Landsat images of Somalia. In my case the images
were interpreted before mosaicing, and the mosaic
was used just as a pretty background for the
results. I remember that one of the images had some
cloud on it, and this ended up being bright blue
(and a long way from white).
--
Regards,
Martin Leese
Web: http://members.tripod.com/martin_leese/

--
Regards,
Martin Leese
E-mail: ***@see.Web.for.e-mail.INVALID
Web: http://members.tripod.com/martin_leese/