Hi, coverage views at the moment only allow for band combinations... I think that Jon wants to do is to extract the L component of the image in HSL space... which should be doable using Jiffle, if one has a recent enough version of GeoServer, the math is here:
https://www.rapidtables.com/convert/color/rgb-to-hsl.html and a reference to Jiffle here: https://docs.geoserver.org/latest/en/user/styling/sld/extensions/rendering-transform.html#running-map-algebra-on-the-fly-using-jiffle Mind, I did not try it out, but it seems it would be a viable approach Cheers Andrea On Tue, Jan 8, 2019 at 10:50 AM Rahkonen Jukka (MML) < [email protected]> wrote: > Hi, > > > > How about making a new layer through coverage view > https://docs.geoserver.org/latest/en/user/data/raster/coverageview.html? > > A grayscale image from RGB might get better if different weights are > applied to input bands but I do not know if it is possible with coverage > views. > > > > -Jukka Rahkonen- > > > > *Lähettäjä:* Jon Britton [mailto:[email protected]] > *Lähetetty:* 8. tammikuuta 2019 10:59 > *Vastaanottaja:* [email protected] > *Aihe:* [Geoserver-users] SLD for styling RGB raster as grayscale > > > > Hi, > > > > We need to be able to provide a grayscale version of one of our map > layers, however there isn’t an obvious way to do this. It easy to produce a > single-band grayscale image, e.g.: > > > > <RasterSymbolizer> > > <Opacity>0.6</Opacity> > > <ChannelSelection> > > <GrayChannel> > > <SourceChannelName>1</SourceChannelName> > > </GrayChannel> > > </ChannelSelection> > > </RasterSymbolizer> > > > > However I need to include all bands. Is there a way to do this using an > SLD without pre-processing the data? The image is RGB. > > > > Thanks, > > > > Jon > > > > *Jon* *Britton* > *Software Engineer, Delivery Team* > > 0121 232 8007 > 07920101956 > > [email protected] > > > > [image: Dotted Eyes Logo] <http://www.field-dynamics.co.uk> > > [image: Twitter] <https://twitter.com/field_dynamics> > > [image: LinkedIn] > <https://www.linkedin.com/company/field-dynamics-consultancy> > > > > *T*: +44 (0) 121 232 8050* | * *E*: [email protected]* | * *W*: > www.field-dynamics.co.uk <http://field-dynamics.co.uk> > > > > Field Dynamics is a trading name of Dotted Eyes Solutions Ltd. Registered > office: 67-71 Northwood Street, Birmingham, B3 1TX. Company registration > number: 9506624. > > > This message may contain confidential and privileged information. If you > are not the intended recipient, please accept our apologies. Please do not > disclose, copy or distribute information in this email or take any action > in reliance on its contents: to do so is strictly prohibited and may be > unlawful. Please inform us that this message has gone astray before > deleting it. Dotted Eyes Solutions Limited have taken precautions to > minimize the risk of transmitting software viruses, however we advise you > to carry out your own virus checks on any attachment to this message. > > > _______________________________________________ > Geoserver-users mailing list > > Please make sure you read the following two resources before posting to > this list: > - Earning your support instead of buying it, but Ian Turton: > http://www.ianturton.com/talks/foss4g.html#/ > - The GeoServer user list posting guidelines: > http://geoserver.org/comm/userlist-guidelines.html > > If you want to request a feature or an improvement, also see this: > https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer > > > [email protected] > https://lists.sourceforge.net/lists/listinfo/geoserver-users > -- Regards, Andrea Aime == GeoServer Professional Services from the experts! Visit http://goo.gl/it488V for more information. == Ing. Andrea Aime @geowolf Technical Lead GeoSolutions S.A.S. Via di Montramito 3/A 55054 Massarosa (LU) phone: +39 0584 962313 fax: +39 0584 1660272 mob: +39 339 8844549 http://www.geo-solutions.it http://twitter.com/geosolutions_it ------------------------------------------------------- *Con riferimento alla normativa sul trattamento dei dati personali (Reg. UE 2016/679 - Regolamento generale sulla protezione dei dati “GDPR”), si precisa che ogni circostanza inerente alla presente email (il suo contenuto, gli eventuali allegati, etc.) è un dato la cui conoscenza è riservata al/i solo/i destinatario/i indicati dallo scrivente. Se il messaggio Le è giunto per errore, è tenuta/o a cancellarlo, ogni altra operazione è illecita. Le sarei comunque grato se potesse darmene notizia. This email is intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. We remind that - as provided by European Regulation 2016/679 “GDPR” - copying, dissemination or use of this e-mail or the information herein by anyone other than the intended recipient is prohibited. If you have received this email by mistake, please notify us immediately by telephone or e-mail.*
_______________________________________________ Geoserver-users mailing list Please make sure you read the following two resources before posting to this list: - Earning your support instead of buying it, but Ian Turton: http://www.ianturton.com/talks/foss4g.html#/ - The GeoServer user list posting guidelines: http://geoserver.org/comm/userlist-guidelines.html If you want to request a feature or an improvement, also see this: https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer [email protected] https://lists.sourceforge.net/lists/listinfo/geoserver-users
