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Windows XP Pro - 2.4GHz - 1.0GB RAM - beta11
As can be seen in the attached images, HDR format images seem to be reversed
when read. The scene displays simply a box with an image map and is
identical for both except on uses a BMP format image and the other uses a
HDR format image, both made from the same original JPG file. This is valid
for "map_type 0", I haven't tested for others.
SCENE FILE:
//start
#declare Map="megane.hdr"; //HDR
//#declare Map="megane.bmp"; //BMP
camera{orthographic
up y*2.05*image_height/image_width
right x*2.05
location <0,-0.15,-2>
look_at <0,-0.15,0>
}
box{<0,0,0><1,1,1> pigment {image_map {hdr Map once interpolate 2 map_type
0}} finish {ambient 1 diffuse 0} scale <2,1,1> translate <-1,-.5,0.1> }
//HDR
//box{<0,0,0><1,1,1> pigment {image_map {hdr Map once interpolate 2 map_type
0}} finish {ambient 1 diffuse 0} scale <2,1,1> translate <-1,-.5,0.1> }
//BMP
//end
-tgq
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Attachments:
Download 'BetatestHDR-37.jpg' (123 KB)
Download 'BetatestBMP-37.jpg' (122 KB)
Preview of image 'BetatestHDR-37.jpg'
Preview of image 'BetatestBMP-37.jpg'
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Trevor G Quayle wrote:
> Windows XP Pro - 2.4GHz - 1.0GB RAM - beta11
>
> As can be seen in the attached images, HDR format images seem to be reversed
> when read. The scene displays simply a box with an image map and is
> identical for both except on uses a BMP format image and the other uses a
> HDR format image, both made from the same original JPG file. This is valid
> for "map_type 0", I haven't tested for others.
The radiance HDR format supports different orientations of the image but
the reader in POV-Ray treats all the same way currently (just like most
other HDR readers around). So you should make sure the program you use
to write the HDR files uses normal (top to bottom, left to right)
orientation.
Christoph
--
POV-Ray tutorials, include files, Landscape of the week:
http://www.imagico.de/ (Last updated 31 Oct. 2005)
MegaPOV with mechanics simulation: http://megapov.inetart.net/
Post a reply to this message
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> The radiance HDR format supports different orientations of the image but
> the reader in POV-Ray treats all the same way currently (just like most
> other HDR readers around). So you should make sure the program you use to
> write the HDR files uses normal (top to bottom, left to right)
> orientation.
>
> Christoph
Opens forwards in HDRShop which I would think is a common HDR program. It
also opens forwards in megapov.
-tgq
Post a reply to this message
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"Trevor G Quayle" <Tin### [at] hotmail com> wrote:
> > The radiance HDR format supports different orientations of the image but
> > the reader in POV-Ray treats all the same way currently (just like most
> > other HDR readers around). So you should make sure the program you use to
> > write the HDR files uses normal (top to bottom, left to right)
> > orientation.
> >
> > Christoph
>
> Opens forwards in HDRShop which I would think is a common HDR program. It
> also opens forwards in megapov.
>
> -tgq
As a follow up, I tried writing and reading HDR images successively in the
beta. (i.e., write the HDR, then read the HDR output by POV as an image
map and rewrite, etc.). This had the effect of flipping the image back and
forth. It would appear to me that the output is being written correctly,
but that it is being read backwards. The attached image shows three
successive outputs from this method (converted to jpg by HDRShop)
As a side note, I also noticed that I get "Unrecognized output file format
H" after the render even though the render and image creation was
successful.
SCENE FILE:
//start
camera{orthographic
up y*2*image_height/image_width
right x*2
location <0,0,-2>
look_at <0,0,0>
}
#declare Map="beta1.hdr"; //HDR - name of HDR output by POV
box{<0,0,0><1,1,1>
pigment {image_map {hdr Map once interpolate 2 map_type 0}}
finish {ambient 1 diffuse 0}
translate <-0.5,-0.5,0.1>
scale <2,2*image_height/image_width,1>
}
//end
-tgq
Post a reply to this message
Attachments:
Download 'beta.jpg' (86 KB)
Preview of image 'beta.jpg'
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Trevor G Quayle wrote:
>
> As a follow up, I tried writing and reading HDR images successively in the
> beta. (i.e., write the HDR, then read the HDR output by POV as an image
> map and rewrite, etc.). This had the effect of flipping the image back and
> forth. It would appear to me that the output is being written correctly,
> but that it is being read backwards.
Yes, indeed it seems the current reading code mirrors the image.
Christoph
--
POV-Ray tutorials, include files, Landscape of the week:
http://www.imagico.de/ (Last updated 31 Oct. 2005)
MegaPOV with mechanics simulation: http://megapov.inetart.net/
Post a reply to this message
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