Re: [Paraview] obtaining the color MAP transfer function

[Mathieu Westphal]

Andrei,

Here you go.

It is actually quite simple :
 - Open ParaView
 - Open Your file, Apply
 - Add a ressample with Image
 - Sampling Dimensions : 200 1 200
 - Apply



Mathieu Westphal

On Fri, Apr 13, 2018 at 12:04 PM, Andrei Cimpoeru <
andrei.cimpo...@cfms.org.uk> wrote:

> Mathieu,
>
> Thanks a lot. When I load your .pvsm Paraview 5.4.1 crashes .Could you
> export the state as .py instead of .pvsm?
>
> Thanks a lot
>
> On Fri, Apr 13, 2018 at 10:56 AM, Mathieu Westphal <
> mathieu.westp...@kitware.com> wrote:
>
>> Andrei,
>>
>> I'm able to generate valid results with the attached state file (use
>> File->Load State to test it)
>> Make sure to set the Sampling Dimensions correctly.
>>
>> Best,
>>
>> Mathieu Westphal
>>
>> On Fri, Apr 13, 2018 at 11:44 AM, Andrei Cimpoeru <
>> andrei.cimpo...@cfms.org.uk> wrote:
>>
>>> Mathiew,
>>>
>>>
>>> Thanks a lot. That was very helpful.
>>> However when I use Resample to Image Filter it looks like my information
>>> is lost. I have attached the dataset so you can have a look.
>>>
>>> Best,
>>>
>>> Andrei
>>>
>>>
>>> On Fri, Apr 13, 2018 at 9:38 AM, Mathieu Westphal <
>>> mathieu.westp...@kitware.com> wrote:
>>>
 Dear Andrei,

 Yes, the "Resample To Image" Filter is dedicated to this task. It will
 allow convert you Unstructured Grid to a regular Image Data and allow you
 to save your data as a .vti file.

 Best,

 Mathieu Westphal

 On Fri, Apr 13, 2018 at 10:35 AM, Andrei Cimpoeru <
 andrei.cimpo...@cfms.org.uk> wrote:

> Dear Mathiew/David,
>
>
> Thanks a lot for you guidance. That was very helpful.
> I have seen that you also support VTI. I had a look at the structure
> of the format and it seems that this is a structured/rectilinear grid. The
> data that I am woking with right now is unstructured .pvd.
> Is there are way in Paraview to project/sample my unstructured dataset
> to a rectiliniar/structured grid so then I can export it to .VTI format?
>
> Many thanks and I am looking forward to hear from you.
>
> Best,
>
> Andrei
>
>
>
>
> On Thu, Apr 12, 2018 at 4:22 PM, David E DeMarle <
> dave.dema...@kitware.com> wrote:
>
>> You can export to cinema to get rendered images for which the data at
>> each pixel in the image is a floating point value not a color.
>>
>> David E DeMarle
>> Kitware, Inc.
>> Principal Engineer
>> 21 Corporate Drive
>> 
>> Clifton Park, NY 12065
>> 
>> -8662
>> Phone: 518-881-4909
>>
>> On Thu, Apr 12, 2018 at 11:13 AM, Mathieu Westphal <
>> mathieu.westp...@kitware.com> wrote:
>>
>>> Hello
>>>
>>> Please keep the ML in the cc so everyone can provide.
>>>
>>> You should be able to do that in the python shell.
>>>
>>> Views->Python Shell
>>>
>>> s = GetActiveSource()
>>> r=Show(s)
>>> l=r.LookupTable
>>> l.RGBPoints
>>>
>>>
>>> Best,
>>>
>>> Mathieu Westphal
>>>
>>> On Thu, Apr 12, 2018 at 3:14 PM, Andrei Cimpoeru <
>>> andrei.cimpo...@cfms.org.uk> wrote:
>>>
 Dear Mathieu,

 Please see the attached picture. I think that I can see a way to
 get back to the original data. Is there a change to access the table 
 with
 the *Color Transfer Function Values?*

 Cheers,

 Andrei

 On Thu, Apr 12, 2018 at 2:10 PM, Mathieu Westphal <
 mathieu.westp...@kitware.com> wrote:

> Dear Andrei
>
> There is no way to guess the pressure values with only the RGB
> data. One can only guess the range and the color map used for 
> generating
> the image.
> You will need to find the original data.
>
> Best,
>
> Mathieu Westphal
>
> On Thu, Apr 12, 2018 at 2:59 PM, Andrei Cimpoeru <
> andrei.cimpo...@cfms.org.uk> wrote:
>
>>
>> Hi Mathieu,
>>
>> Thanks for getting back to me. Let's say that I have the image
>> below (attached). If you load it in Paraview  you have a vector 
>> field of
>> PNG consisting of RGB values. How do I turn these values back to 
>> pressure.
>> I am interested in this because I want to map the RGB colors back
>> to pressure field. Is there any way to this using vtk-python?
>>
>> Cheers,
>>
>> Andrei
>>
>>
>>
>> On Thu, Apr 12, 2018 at 12:00 PM, Mathieu Westphal <
>> mathieu.westp...@kitware.com> wrote:
>>
>>> Dear Andrei,
>>>
>>> I'm not sure to follow what your are 

Re: [Paraview] obtaining the color MAP transfer function

[Andrei Cimpoeru]

Mathieu,

Thanks a lot. When I load your .pvsm Paraview 5.4.1 crashes .Could you
export the state as .py instead of .pvsm?

Thanks a lot

On Fri, Apr 13, 2018 at 10:56 AM, Mathieu Westphal <
mathieu.westp...@kitware.com> wrote:

> Andrei,
>
> I'm able to generate valid results with the attached state file (use
> File->Load State to test it)
> Make sure to set the Sampling Dimensions correctly.
>
> Best,
>
> Mathieu Westphal
>
> On Fri, Apr 13, 2018 at 11:44 AM, Andrei Cimpoeru <
> andrei.cimpo...@cfms.org.uk> wrote:
>
>> Mathiew,
>>
>>
>> Thanks a lot. That was very helpful.
>> However when I use Resample to Image Filter it looks like my information
>> is lost. I have attached the dataset so you can have a look.
>>
>> Best,
>>
>> Andrei
>>
>>
>> On Fri, Apr 13, 2018 at 9:38 AM, Mathieu Westphal <
>> mathieu.westp...@kitware.com> wrote:
>>
>>> Dear Andrei,
>>>
>>> Yes, the "Resample To Image" Filter is dedicated to this task. It will
>>> allow convert you Unstructured Grid to a regular Image Data and allow you
>>> to save your data as a .vti file.
>>>
>>> Best,
>>>
>>> Mathieu Westphal
>>>
>>> On Fri, Apr 13, 2018 at 10:35 AM, Andrei Cimpoeru <
>>> andrei.cimpo...@cfms.org.uk> wrote:
>>>
 Dear Mathiew/David,


 Thanks a lot for you guidance. That was very helpful.
 I have seen that you also support VTI. I had a look at the structure of
 the format and it seems that this is a structured/rectilinear grid. The
 data that I am woking with right now is unstructured .pvd.
 Is there are way in Paraview to project/sample my unstructured dataset
 to a rectiliniar/structured grid so then I can export it to .VTI format?

 Many thanks and I am looking forward to hear from you.

 Best,

 Andrei




 On Thu, Apr 12, 2018 at 4:22 PM, David E DeMarle <
 dave.dema...@kitware.com> wrote:

> You can export to cinema to get rendered images for which the data at
> each pixel in the image is a floating point value not a color.
>
> David E DeMarle
> Kitware, Inc.
> Principal Engineer
> 21 Corporate Drive
> 
> Clifton Park, NY 12065
> 
> -8662
> Phone: 518-881-4909
>
> On Thu, Apr 12, 2018 at 11:13 AM, Mathieu Westphal <
> mathieu.westp...@kitware.com> wrote:
>
>> Hello
>>
>> Please keep the ML in the cc so everyone can provide.
>>
>> You should be able to do that in the python shell.
>>
>> Views->Python Shell
>>
>> s = GetActiveSource()
>> r=Show(s)
>> l=r.LookupTable
>> l.RGBPoints
>>
>>
>> Best,
>>
>> Mathieu Westphal
>>
>> On Thu, Apr 12, 2018 at 3:14 PM, Andrei Cimpoeru <
>> andrei.cimpo...@cfms.org.uk> wrote:
>>
>>> Dear Mathieu,
>>>
>>> Please see the attached picture. I think that I can see a way to get
>>> back to the original data. Is there a change to access the table with 
>>> the *Color
>>> Transfer Function Values?*
>>>
>>> Cheers,
>>>
>>> Andrei
>>>
>>> On Thu, Apr 12, 2018 at 2:10 PM, Mathieu Westphal <
>>> mathieu.westp...@kitware.com> wrote:
>>>
 Dear Andrei

 There is no way to guess the pressure values with only the RGB
 data. One can only guess the range and the color map used for 
 generating
 the image.
 You will need to find the original data.

 Best,

 Mathieu Westphal

 On Thu, Apr 12, 2018 at 2:59 PM, Andrei Cimpoeru <
 andrei.cimpo...@cfms.org.uk> wrote:

>
> Hi Mathieu,
>
> Thanks for getting back to me. Let's say that I have the image
> below (attached). If you load it in Paraview  you have a vector field 
> of
> PNG consisting of RGB values. How do I turn these values back to 
> pressure.
> I am interested in this because I want to map the RGB colors back
> to pressure field. Is there any way to this using vtk-python?
>
> Cheers,
>
> Andrei
>
>
>
> On Thu, Apr 12, 2018 at 12:00 PM, Mathieu Westphal <
> mathieu.westp...@kitware.com> wrote:
>
>> Dear Andrei,
>>
>> I'm not sure to follow what your are trying to achieve. Please
>> explain again.
>>
>> In any case, the mapping between the pressure and the RGB values
>> you see in paraview is controlled by
>> the Color Map Editor and the range of the data. All these tools
>> are accessible in the Toolbar visible in the attached image, I've
>> highligthed the Color Editor button.
>>
>> Best regards,
>>
>>
>>

Re: [Paraview] obtaining the color MAP transfer function

[Mathieu Westphal]

Dear Andrei,

Yes, the "Resample To Image" Filter is dedicated to this task. It will
allow convert you Unstructured Grid to a regular Image Data and allow you
to save your data as a .vti file.

Best,

Mathieu Westphal

On Fri, Apr 13, 2018 at 10:35 AM, Andrei Cimpoeru <
andrei.cimpo...@cfms.org.uk> wrote:

> Dear Mathiew/David,
>
>
> Thanks a lot for you guidance. That was very helpful.
> I have seen that you also support VTI. I had a look at the structure of
> the format and it seems that this is a structured/rectilinear grid. The
> data that I am woking with right now is unstructured .pvd.
> Is there are way in Paraview to project/sample my unstructured dataset to
> a rectiliniar/structured grid so then I can export it to .VTI format?
>
> Many thanks and I am looking forward to hear from you.
>
> Best,
>
> Andrei
>
>
>
>
> On Thu, Apr 12, 2018 at 4:22 PM, David E DeMarle  > wrote:
>
>> You can export to cinema to get rendered images for which the data at
>> each pixel in the image is a floating point value not a color.
>>
>> David E DeMarle
>> Kitware, Inc.
>> Principal Engineer
>> 21 Corporate Drive
>> 
>> Clifton Park, NY 12065
>> 
>> -8662
>> Phone: 518-881-4909
>>
>> On Thu, Apr 12, 2018 at 11:13 AM, Mathieu Westphal <
>> mathieu.westp...@kitware.com> wrote:
>>
>>> Hello
>>>
>>> Please keep the ML in the cc so everyone can provide.
>>>
>>> You should be able to do that in the python shell.
>>>
>>> Views->Python Shell
>>>
>>> s = GetActiveSource()
>>> r=Show(s)
>>> l=r.LookupTable
>>> l.RGBPoints
>>>
>>>
>>> Best,
>>>
>>> Mathieu Westphal
>>>
>>> On Thu, Apr 12, 2018 at 3:14 PM, Andrei Cimpoeru <
>>> andrei.cimpo...@cfms.org.uk> wrote:
>>>
 Dear Mathieu,

 Please see the attached picture. I think that I can see a way to get
 back to the original data. Is there a change to access the table with the 
 *Color
 Transfer Function Values?*

 Cheers,

 Andrei

 On Thu, Apr 12, 2018 at 2:10 PM, Mathieu Westphal <
 mathieu.westp...@kitware.com> wrote:

> Dear Andrei
>
> There is no way to guess the pressure values with only the RGB data.
> One can only guess the range and the color map used for generating the
> image.
> You will need to find the original data.
>
> Best,
>
> Mathieu Westphal
>
> On Thu, Apr 12, 2018 at 2:59 PM, Andrei Cimpoeru <
> andrei.cimpo...@cfms.org.uk> wrote:
>
>>
>> Hi Mathieu,
>>
>> Thanks for getting back to me. Let's say that I have the image below
>> (attached). If you load it in Paraview  you have a vector field of PNG
>> consisting of RGB values. How do I turn these values back to pressure.
>> I am interested in this because I want to map the RGB colors back to
>> pressure field. Is there any way to this using vtk-python?
>>
>> Cheers,
>>
>> Andrei
>>
>>
>>
>> On Thu, Apr 12, 2018 at 12:00 PM, Mathieu Westphal <
>> mathieu.westp...@kitware.com> wrote:
>>
>>> Dear Andrei,
>>>
>>> I'm not sure to follow what your are trying to achieve. Please
>>> explain again.
>>>
>>> In any case, the mapping between the pressure and the RGB values you
>>> see in paraview is controlled by
>>> the Color Map Editor and the range of the data. All these tools are
>>> accessible in the Toolbar visible in the attached image, I've 
>>> highligthed
>>> the Color Editor button.
>>>
>>> Best regards,
>>>
>>>
>>> Mathieu Westphal
>>>
>>> On Thu, Apr 12, 2018 at 12:28 PM, Andrei Cimpoeru <
>>> andrei.cimpo...@cfms.org.uk> wrote:
>>>
 Hi ,

 I am currently working with Paraview  and deep learning models. I
 have created a set of images (.png) using Paraview. The images are 
 related
 to the pressure field around a wing. When I load images back to 
 Paraview
 all I can visualise are the RGB  values.
 *When the image are exported from Paraview the pressure field is
 transferred into RGB values. Is there a way to obtain the function that
 does that?*
 Instead of exporting to .png a data format that I like is the .vti.
 This format keep the current information about pressure, velocity, mach
 number etc. Is there something that I could export a slice  to .vti?

  Many thanks and I am looking forward to hear from you.

 Cheers,

 Andrei



 --
 *Andrei Cimpoeru* // CFD Engineer


 

 *e: *andrei.cimpo...@cfms.org.uk   *t*: 0117 906 1106   *w: *
 ww

Re: [Paraview] obtaining the color MAP transfer function

[Andrei Cimpoeru]

Dear Mathiew/David,


Thanks a lot for you guidance. That was very helpful.
I have seen that you also support VTI. I had a look at the structure of the
format and it seems that this is a structured/rectilinear grid. The data
that I am woking with right now is unstructured .pvd.
Is there are way in Paraview to project/sample my unstructured dataset to a
rectiliniar/structured grid so then I can export it to .VTI format?

Many thanks and I am looking forward to hear from you.

Best,

Andrei




On Thu, Apr 12, 2018 at 4:22 PM, David E DeMarle 
wrote:

> You can export to cinema to get rendered images for which the data at each
> pixel in the image is a floating point value not a color.
>
> David E DeMarle
> Kitware, Inc.
> Principal Engineer
> 21 Corporate Drive
> 
> Clifton Park, NY 12065
> 
> -8662
> Phone: 518-881-4909
>
> On Thu, Apr 12, 2018 at 11:13 AM, Mathieu Westphal <
> mathieu.westp...@kitware.com> wrote:
>
>> Hello
>>
>> Please keep the ML in the cc so everyone can provide.
>>
>> You should be able to do that in the python shell.
>>
>> Views->Python Shell
>>
>> s = GetActiveSource()
>> r=Show(s)
>> l=r.LookupTable
>> l.RGBPoints
>>
>>
>> Best,
>>
>> Mathieu Westphal
>>
>> On Thu, Apr 12, 2018 at 3:14 PM, Andrei Cimpoeru <
>> andrei.cimpo...@cfms.org.uk> wrote:
>>
>>> Dear Mathieu,
>>>
>>> Please see the attached picture. I think that I can see a way to get
>>> back to the original data. Is there a change to access the table with the 
>>> *Color
>>> Transfer Function Values?*
>>>
>>> Cheers,
>>>
>>> Andrei
>>>
>>> On Thu, Apr 12, 2018 at 2:10 PM, Mathieu Westphal <
>>> mathieu.westp...@kitware.com> wrote:
>>>
 Dear Andrei

 There is no way to guess the pressure values with only the RGB data.
 One can only guess the range and the color map used for generating the
 image.
 You will need to find the original data.

 Best,

 Mathieu Westphal

 On Thu, Apr 12, 2018 at 2:59 PM, Andrei Cimpoeru <
 andrei.cimpo...@cfms.org.uk> wrote:

>
> Hi Mathieu,
>
> Thanks for getting back to me. Let's say that I have the image below
> (attached). If you load it in Paraview  you have a vector field of PNG
> consisting of RGB values. How do I turn these values back to pressure.
> I am interested in this because I want to map the RGB colors back to
> pressure field. Is there any way to this using vtk-python?
>
> Cheers,
>
> Andrei
>
>
>
> On Thu, Apr 12, 2018 at 12:00 PM, Mathieu Westphal <
> mathieu.westp...@kitware.com> wrote:
>
>> Dear Andrei,
>>
>> I'm not sure to follow what your are trying to achieve. Please
>> explain again.
>>
>> In any case, the mapping between the pressure and the RGB values you
>> see in paraview is controlled by
>> the Color Map Editor and the range of the data. All these tools are
>> accessible in the Toolbar visible in the attached image, I've highligthed
>> the Color Editor button.
>>
>> Best regards,
>>
>>
>> Mathieu Westphal
>>
>> On Thu, Apr 12, 2018 at 12:28 PM, Andrei Cimpoeru <
>> andrei.cimpo...@cfms.org.uk> wrote:
>>
>>> Hi ,
>>>
>>> I am currently working with Paraview  and deep learning models. I
>>> have created a set of images (.png) using Paraview. The images are 
>>> related
>>> to the pressure field around a wing. When I load images back to Paraview
>>> all I can visualise are the RGB  values.
>>> *When the image are exported from Paraview the pressure field is
>>> transferred into RGB values. Is there a way to obtain the function that
>>> does that?*
>>> Instead of exporting to .png a data format that I like is the .vti.
>>> This format keep the current information about pressure, velocity, mach
>>> number etc. Is there something that I could export a slice  to .vti?
>>>
>>>  Many thanks and I am looking forward to hear from you.
>>>
>>> Cheers,
>>>
>>> Andrei
>>>
>>>
>>>
>>> --
>>> *Andrei Cimpoeru* // CFD Engineer
>>>
>>>
>>> 
>>>
>>> *e: *andrei.cimpo...@cfms.org.uk   *t*: 0117 906 1106   *w: *
>>> www.cfms.org.uk
>>> CFMS Services Ltd // Bristol & Bath Science Park // Dirac Crescent
>>> // Emersons Green // Bristol // BS16 7FR
>>>
>>> CFMS Services Ltd is registered in England and Wales No 05742022 - a
>>> subsidiary of CFMS Ltd
>>> CFMS Services Ltd registered office // 43 Queens Square // Bristol
>>> // BS1 4QP
>>>
>>> ___
>>> Powered by www.kitware.com
>>>
>>> Visit other Kitware open-sourc

Re: [Paraview] obtaining the color MAP transfer function

[David E DeMarle]

You can export to cinema to get rendered images for which the data at each
pixel in the image is a floating point value not a color.

David E DeMarle
Kitware, Inc.
Principal Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909

On Thu, Apr 12, 2018 at 11:13 AM, Mathieu Westphal <
mathieu.westp...@kitware.com> wrote:

> Hello
>
> Please keep the ML in the cc so everyone can provide.
>
> You should be able to do that in the python shell.
>
> Views->Python Shell
>
> s = GetActiveSource()
> r=Show(s)
> l=r.LookupTable
> l.RGBPoints
>
>
> Best,
>
> Mathieu Westphal
>
> On Thu, Apr 12, 2018 at 3:14 PM, Andrei Cimpoeru <
> andrei.cimpo...@cfms.org.uk> wrote:
>
>> Dear Mathieu,
>>
>> Please see the attached picture. I think that I can see a way to get back
>> to the original data. Is there a change to access the table with the *Color
>> Transfer Function Values?*
>>
>> Cheers,
>>
>> Andrei
>>
>> On Thu, Apr 12, 2018 at 2:10 PM, Mathieu Westphal <
>> mathieu.westp...@kitware.com> wrote:
>>
>>> Dear Andrei
>>>
>>> There is no way to guess the pressure values with only the RGB data. One
>>> can only guess the range and the color map used for generating the image.
>>> You will need to find the original data.
>>>
>>> Best,
>>>
>>> Mathieu Westphal
>>>
>>> On Thu, Apr 12, 2018 at 2:59 PM, Andrei Cimpoeru <
>>> andrei.cimpo...@cfms.org.uk> wrote:
>>>

 Hi Mathieu,

 Thanks for getting back to me. Let's say that I have the image below
 (attached). If you load it in Paraview  you have a vector field of PNG
 consisting of RGB values. How do I turn these values back to pressure.
 I am interested in this because I want to map the RGB colors back to
 pressure field. Is there any way to this using vtk-python?

 Cheers,

 Andrei



 On Thu, Apr 12, 2018 at 12:00 PM, Mathieu Westphal <
 mathieu.westp...@kitware.com> wrote:

> Dear Andrei,
>
> I'm not sure to follow what your are trying to achieve. Please explain
> again.
>
> In any case, the mapping between the pressure and the RGB values you
> see in paraview is controlled by
> the Color Map Editor and the range of the data. All these tools are
> accessible in the Toolbar visible in the attached image, I've highligthed
> the Color Editor button.
>
> Best regards,
>
>
> Mathieu Westphal
>
> On Thu, Apr 12, 2018 at 12:28 PM, Andrei Cimpoeru <
> andrei.cimpo...@cfms.org.uk> wrote:
>
>> Hi ,
>>
>> I am currently working with Paraview  and deep learning models. I
>> have created a set of images (.png) using Paraview. The images are 
>> related
>> to the pressure field around a wing. When I load images back to Paraview
>> all I can visualise are the RGB  values.
>> *When the image are exported from Paraview the pressure field is
>> transferred into RGB values. Is there a way to obtain the function that
>> does that?*
>> Instead of exporting to .png a data format that I like is the .vti.
>> This format keep the current information about pressure, velocity, mach
>> number etc. Is there something that I could export a slice  to .vti?
>>
>>  Many thanks and I am looking forward to hear from you.
>>
>> Cheers,
>>
>> Andrei
>>
>>
>>
>> --
>> *Andrei Cimpoeru* // CFD Engineer
>>
>>
>> 
>>
>> *e: *andrei.cimpo...@cfms.org.uk   *t*: 0117 906 1106   *w: *
>> www.cfms.org.uk
>> CFMS Services Ltd // Bristol & Bath Science Park // Dirac Crescent //
>>  Emersons Green // Bristol // BS16 7FR
>>
>> CFMS Services Ltd is registered in England and Wales No 05742022 - a
>> subsidiary of CFMS Ltd
>> CFMS Services Ltd registered office // 43 Queens Square // Bristol
>> // BS1 4QP
>>
>> ___
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the ParaView Wiki at:
>> http://paraview.org/Wiki/ParaView
>>
>> Search the list archives at: http://markmail.org/search/?q=ParaView
>>
>> Follow this link to subscribe/unsubscribe:
>> https://public.kitware.com/mailman/listinfo/paraview
>>
>>
>


 --
 *Andrei Cimpoeru* // CFD Engineer


 

 *e: *andrei.cimpo...@cfms.org.uk   *t*: 0117 906 1106   *w: *
 www.cfms.org.uk
 CFMS Services Ltd // Bristol & Bath Science Park // Dirac Crescent // 
 Emersons
 Green // Bristol // BS16 7FR

 CFMS Services Ltd is registered in England and Wales No 05742022 - a
 subsidiary of CFMS Ltd
 CFMS S

Re: [Paraview] obtaining the color MAP transfer function

[Mathieu Westphal]

Hello

Please keep the ML in the cc so everyone can provide.

You should be able to do that in the python shell.

Views->Python Shell

s = GetActiveSource()
r=Show(s)
l=r.LookupTable
l.RGBPoints


Best,

Mathieu Westphal

On Thu, Apr 12, 2018 at 3:14 PM, Andrei Cimpoeru <
andrei.cimpo...@cfms.org.uk> wrote:

> Dear Mathieu,
>
> Please see the attached picture. I think that I can see a way to get back
> to the original data. Is there a change to access the table with the *Color
> Transfer Function Values?*
>
> Cheers,
>
> Andrei
>
> On Thu, Apr 12, 2018 at 2:10 PM, Mathieu Westphal <
> mathieu.westp...@kitware.com> wrote:
>
>> Dear Andrei
>>
>> There is no way to guess the pressure values with only the RGB data. One
>> can only guess the range and the color map used for generating the image.
>> You will need to find the original data.
>>
>> Best,
>>
>> Mathieu Westphal
>>
>> On Thu, Apr 12, 2018 at 2:59 PM, Andrei Cimpoeru <
>> andrei.cimpo...@cfms.org.uk> wrote:
>>
>>>
>>> Hi Mathieu,
>>>
>>> Thanks for getting back to me. Let's say that I have the image below
>>> (attached). If you load it in Paraview  you have a vector field of PNG
>>> consisting of RGB values. How do I turn these values back to pressure.
>>> I am interested in this because I want to map the RGB colors back to
>>> pressure field. Is there any way to this using vtk-python?
>>>
>>> Cheers,
>>>
>>> Andrei
>>>
>>>
>>>
>>> On Thu, Apr 12, 2018 at 12:00 PM, Mathieu Westphal <
>>> mathieu.westp...@kitware.com> wrote:
>>>
 Dear Andrei,

 I'm not sure to follow what your are trying to achieve. Please explain
 again.

 In any case, the mapping between the pressure and the RGB values you
 see in paraview is controlled by
 the Color Map Editor and the range of the data. All these tools are
 accessible in the Toolbar visible in the attached image, I've highligthed
 the Color Editor button.

 Best regards,


 Mathieu Westphal

 On Thu, Apr 12, 2018 at 12:28 PM, Andrei Cimpoeru <
 andrei.cimpo...@cfms.org.uk> wrote:

> Hi ,
>
> I am currently working with Paraview  and deep learning models. I have
> created a set of images (.png) using Paraview. The images are related to
> the pressure field around a wing. When I load images back to Paraview all 
> I
> can visualise are the RGB  values.
> *When the image are exported from Paraview the pressure field is
> transferred into RGB values. Is there a way to obtain the function that
> does that?*
> Instead of exporting to .png a data format that I like is the .vti.
> This format keep the current information about pressure, velocity, mach
> number etc. Is there something that I could export a slice  to .vti?
>
>  Many thanks and I am looking forward to hear from you.
>
> Cheers,
>
> Andrei
>
>
>
> --
> *Andrei Cimpoeru* // CFD Engineer
>
>
> 
>
> *e: *andrei.cimpo...@cfms.org.uk   *t*: 0117 906 1106   *w: *
> www.cfms.org.uk
> CFMS Services Ltd // Bristol & Bath Science Park // Dirac Crescent // 
> Emersons
> Green // Bristol // BS16 7FR
>
> CFMS Services Ltd is registered in England and Wales No 05742022 - a
> subsidiary of CFMS Ltd
> CFMS Services Ltd registered office // 43 Queens Square // Bristol //
> BS1 4QP
>
> ___
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at:
> http://paraview.org/Wiki/ParaView
>
> Search the list archives at: http://markmail.org/search/?q=ParaView
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/paraview
>
>

>>>
>>>
>>> --
>>> *Andrei Cimpoeru* // CFD Engineer
>>>
>>>
>>> 
>>>
>>> *e: *andrei.cimpo...@cfms.org.uk   *t*: 0117 906 1106   *w: *
>>> www.cfms.org.uk
>>> CFMS Services Ltd // Bristol & Bath Science Park // Dirac Crescent // 
>>> Emersons
>>> Green // Bristol // BS16 7FR
>>>
>>> CFMS Services Ltd is registered in England and Wales No 05742022 - a
>>> subsidiary of CFMS Ltd
>>> CFMS Services Ltd registered office // 43 Queens Square // Bristol //
>>> BS1 4QP
>>>
>>
>>
>
>
> --
> *Andrei Cimpoeru* // CFD Engineer
>
>
> 
>
> *e: *andrei.cimpo...@cfms.org.uk   *t*: 0117 906 1106   *w: *
> www.cfms.org.uk
> CFMS Services Ltd // Bristol & Bath Science Park // Dirac Crescent // Emersons
> Green // Bristol // BS16 7FR
>
> CFMS Services Ltd is registered in England and Wales No 05742022 - a
> subs

Re: [Paraview] obtaining the color MAP transfer function

[Mathieu Westphal]

Dear Andrei,

I'm not sure to follow what your are trying to achieve. Please explain
again.

In any case, the mapping between the pressure and the RGB values you see in
paraview is controlled by
the Color Map Editor and the range of the data. All these tools are
accessible in the Toolbar visible in the attached image, I've highligthed
the Color Editor button.

Best regards,


Mathieu Westphal

On Thu, Apr 12, 2018 at 12:28 PM, Andrei Cimpoeru <
andrei.cimpo...@cfms.org.uk> wrote:

> Hi ,
>
> I am currently working with Paraview  and deep learning models. I have
> created a set of images (.png) using Paraview. The images are related to
> the pressure field around a wing. When I load images back to Paraview all I
> can visualise are the RGB  values.
> *When the image are exported from Paraview the pressure field is
> transferred into RGB values. Is there a way to obtain the function that
> does that?*
> Instead of exporting to .png a data format that I like is the .vti. This
> format keep the current information about pressure, velocity, mach number
> etc. Is there something that I could export a slice  to .vti?
>
>  Many thanks and I am looking forward to hear from you.
>
> Cheers,
>
> Andrei
>
>
>
> --
> *Andrei Cimpoeru* // CFD Engineer
>
>
> 
>
> *e: *andrei.cimpo...@cfms.org.uk   *t*: 0117 906 1106   *w: *
> www.cfms.org.uk
> CFMS Services Ltd // Bristol & Bath Science Park // Dirac Crescent // Emersons
> Green // Bristol // BS16 7FR
>
> CFMS Services Ltd is registered in England and Wales No 05742022 - a
> subsidiary of CFMS Ltd
> CFMS Services Ltd registered office // 43 Queens Square // Bristol // BS1
> 4QP
>
> ___
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/
> opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at:
> http://paraview.org/Wiki/ParaView
>
> Search the list archives at: http://markmail.org/search/?q=ParaView
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/paraview
>
>
___
Powered by www.kitware.com

Visit other Kitware open-source projects at 
http://www.kitware.com/opensource/opensource.html

Please keep messages on-topic and check the ParaView Wiki at: 
http://paraview.org/Wiki/ParaView

Search the list archives at: http://markmail.org/search/?q=ParaView

Follow this link to subscribe/unsubscribe:
https://public.kitware.com/mailman/listinfo/paraview