[OSGeo Africa] CIR and False Colour

[Khalid Mather]

Do these emails go back to everyone? 😂....#RIP

Thanks Aslam, it about tbe encoding I see,  the paper i read that in didnt
elaborate , it merely stated "Also known as false color images".
Also appreciate you clearing it up and describing how to derive the CIR
from the false colours.

thanks again seriously

On 01 Nov 2016 15:56, "Aslam Parker" <Aslam.Parker at drdlr.gov.za> wrote:

> Hi All
>
>
>
> False color (or false colour) refers to a group of color rendering methods
> used to display images in color which were recorded in the visible or
> non-visible parts of the electromagnetic spectrum.
>
>
>
> A false-color image is an image that depicts an object in colors that
> differ from those a photograph (a "true-color" image) would show. The
> simplest false-color encoding is to take an RGB image in the visible
> spectrum, but map it differently, e.g. "GBR→RGB". For "traditional
> false-color" satellite images of Earth a "NRG→RGB" mapping is used, with
> "N" being the near-infrared spectral band (and the blue spectral band being
> unused) – this yields the typical "vegetation in red" false-colour images.
>
>
>
> It is not correct to say that false colour = colour infrared, because CIR
> is one of the many encoding (combinations) of false colour .
>
>
>
> CIR is created when the bands are displayed in the following order:G,B,NIR
>
>
>
> *From:* Africa [mailto:africa-bounces at lists.osgeo.org] *On Behalf Of *Khalid
> Mather
> *Sent:* 01 November 2016 03:26 PM
> *To:* Africa local chapter discussions
> *Subject:* Re: [OSGeo Africa] CIR and False Colour
>
>
>
> Wow thanks theo for the wealth of information, my lecturer is also a part
> of this mailing forum and he lambasted me for asking elementary questions
> 😂, but if you dont know you gotta ask right?
> (CiR are false colors btw)
>
> .anyways I do have time, because this is going to be part of my masters
> work . I will table these suggestions to him and get back to you if
> needed.
>
> Thank you so much once again Sir
>
> Warmest Regards
> Khalid Mather
>
>
>
> On 01 Nov 2016 15:19, <theo at integritsense.co.za> wrote:
>
> Hi Khalid
>
> SANSA has access to ADS Pleiades 0.5m GSD satellite imagery (can be
> tasked, or you can look for catalogue).
>
> 1. That should fit the student budget.
>
> 2. Unsure.
>
> 3. Try SANSA, maybe? Otherwise the CGA at Stellenbosch University.
>
> 4. OBIA packages, or (if you are feeling very lucky and have time to train
> the classifier, supervised pixel based image classifiers coupled with a DSM
> and DEM).
>
> Alternatively, there are UAV based solutions out there. If you need help
> with those, give me a shout. We have pretty good contacts that side that
> could do it, whom we have used before.
>
> Best regards,
> Theo
>
> Theo Pistorius
> Founder: IntegriSense & DroneClouds
> +27 79 798 8558
> theo at integritsense.co.za
>
> From: Khalid Mather
> Sent: Monday 31 October, 14:55
> Subject: [OSGeo Africa] CIR and False Colour
> To: Africa local chapter discussions
>
> Hi Guys  , hope you are all keeping well.
>
> I am attempting a project to measure street Tree biomass or tree presence
> in the greater Durban region. I have a few questions though
>
> 1.  is very high spatial resolution data available for use (on a students
> budget)
>
> 2. are Colour Infra-Red and False Colour images the same thing?
>
> 3. Where can I find CIR/ False colour images of Durban?
>
> 4. Does anyone have any input as to how this project can be achieved with
> as few additional resources as possible? 😂
>
> Thanks and kind Regards
>
> Khalid Mather
>
>
> _______________________________________________
> Africa mailing list
> Africa at lists.osgeo.org
> You can UNSUBSCRIBE at http://lists.osgeo.org/mailman/listinfo/africa
>
>
>
> _______________________________________________
> Africa mailing list
> Africa at lists.osgeo.org
> You can UNSUBSCRIBE at http://lists.osgeo.org/mailman/listinfo/africa
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/africa/attachments/20161101/3b3dafa9/attachment.html>