On 3/12/2016 11:57 AM, StephenS wrote:
> On 12/03/2016 12:56 AM, Mike Horvath wrote:
>> Did I mess up these two images?
>>
>> https://www.flickr.com/photos/108839565@N04/25050132394/in/dateposted-public/
>>
>>
>> https://www.flickr.com/photos/108839565@N04/25654484906/in/dateposted-public/
>>
>>
>>
>> I've been using StereoPhoto Maker with default settings and the images
>> are mainly just giving me a headache instead of appearing 3D.
>>
>>
>> Mike
> It looks like your offset is to strong.
> I use about 25-30 to 1.
> 25 units from camera to object, 1 unit camera offset between pictures.
>
> Stephen S

How do you set the offset to xx? I can use the adjust and auto adjust 
but cannot see a setting for it.

-- 

Regards
     Stephen

Post a reply to this message

...
> How do you set the offset to xx? I can use the adjust and auto adjust
> but cannot see a setting for it.
>
In the program used to generate the two pictures (Povray), offset the 
camera 25 to 1 between pictures.

For all my anaglyphs I also move the camera_look_at by the same amount.

Stephen S

Post a reply to this message

On 3/12/2016 4:46 PM, StephenS wrote:
> ...
>> How do you set the offset to xx? I can use the adjust and auto adjust
>> but cannot see a setting for it.
>>
> In the program used to generate the two pictures (Povray), offset the
> camera 25 to 1 between pictures.
>
> For all my anaglyphs I also move the camera_look_at by the same amount.
>
> Stephen S

I still don't understand. Do you mean I should separate the cameras by 1 
unit for every 25 units of distance from the target?

I actually separate the cameras by a fixed angle (5 degrees), with the 
target as the center point, instead of a linear distance. What angle 
would a 25:1 ratio be?


// Camera
#ifndef (LDXSkipCamera)
	#declare camera_eye = 1;			// -1 = no eye, 0 = left eye, 1 = right eye
	#declare LDXCamAspect = image_width/image_height;
	camera {
		location	LDXCameraLoc
		sky			LDXCameraSky
		right		LDXCamAspect * < -1,0,0 >
		look_at		LDXCameraLookAt
		angle		57.822403
		#switch (camera_eye)
			#case (0)
				#include "transforms.inc"
				translate	-LDXCameraLookAt
				Axis_Rotate_Trans(y, +5/2)
				translate	+LDXCameraLookAt
			#break
			#case (1)
				#include "transforms.inc"
				translate	-LDXCameraLookAt
				Axis_Rotate_Trans(y, -5/2)
				translate	+LDXCameraLookAt
			#break
		#end
	}
#end



Mike

Post a reply to this message

...
> Do you mean I should separate the cameras by 1
> unit for every 25 units of distance from the target?
...
Yes
The pictures reminds me of to much offset (10 to 1?).
Although there maybe other ways to get this effect.

You are using converging lines, fixed look_at.
I use parallel lines for my work, same viewing plane.
A different 'rule of thumb' may be needed.
I'm happy with my 3d effect, although not always with the subject matter ;-)

Stephen S

Post a reply to this message

On 12/03/2016 12:56 AM, Mike Horvath wrote:
> Did I mess up these two images?
>
> https://www.flickr.com/photos/108839565@N04/25050132394/in/dateposted-public/
>
...

You have a strong separation between the two color channels.
Even more pronounced because of the strong black color of the wings.

A little 3d can go along way.

The following pictures with the same first frame, have:
camera at -25y and look_at <0,0,0>
.5 units x second frame
1 unit x
2 units x

For me the first picture looks nice (50 to 1)
Second OK (25 to 1)
Third (12.5 to 1) starting to get strong, making my brain work hard ;-)

Stephen S

Post a reply to this message

Attachments:
Download 'anaglyph_test_scene_50to1_parallel.png' (192 KB) Download 'anaglyph_test_scene_25to1_parallel.png' (210 KB) Download 'anaglyph_test_scene_12p5to1_parallel.png' (199 KB)

Preview of image 'anaglyph_test_scene_50to1_parallel.png'

Preview of image 'anaglyph_test_scene_25to1_parallel.png'

Preview of image 'anaglyph_test_scene_12p5to1_parallel.png'

On 3/12/2016 9:46 PM, StephenS wrote:
> ....
>> How do you set the offset to xx? I can use the adjust and auto adjust
>> but cannot see a setting for it.
>>
> In the program used to generate the two pictures (Povray), offset the
> camera 25 to 1 between pictures.
>
> For all my anaglyphs I also move the camera_look_at by the same amount.
>
> Stephen S


That is a Duh! on my part. I was thinking about the alignment of the 
left and right images in the final image.


-- 

Regards
     Stephen

Post a reply to this message

...
> The following pictures with the same first frame, have:
> camera at -25y and look_at <0,0,0>
...
and with same look_at (converging lines).

The third one looks like the problem with ldr_small_shuttle.

Stephen S

Post a reply to this message

Attachments:
Download 'anaglyph_test_scene_50to1_converge.png' (197 KB) Download 'anaglyph_test_scene_25to1_converge.png' (202 KB) Download 'anaglyph_test_scene_12p5to1_converge.png' (205 KB)

Preview of image 'anaglyph_test_scene_50to1_converge.png'

Preview of image 'anaglyph_test_scene_25to1_converge.png'

Preview of image 'anaglyph_test_scene_12p5to1_converge.png'

On 3/13/2016 11:53 AM, StephenS wrote:
> ...
>> The following pictures with the same first frame, have:
>> camera at -25y and look_at <0,0,0>
> ...
> and with same look_at (converging lines).
>
> The third one looks like the problem with ldr_small_shuttle.
>
> Stephen S
>

What's weird is that the stereo renders look fine using my stereoscope, 
with the same POV-Ray settings.


Mike

Post a reply to this message

On 3/13/2016 12:15 AM, StephenS wrote:
> ....
>> Do you mean I should separate the cameras by 1
>> unit for every 25 units of distance from the target?
> ....
> Yes
> The pictures reminds me of to much offset (10 to 1?).
> Although there maybe other ways to get this effect.
>
> You are using converging lines, fixed look_at.
> I use parallel lines for my work, same viewing plane.
> A different 'rule of thumb' may be needed.

This whole thing has been confusing me for some time.
To my mind.
It is obvious that the natural way of creating Stereographic images 
should be to use a toe in or convergence. But doing that can create a 
keystone effect. Using parallel cameras is ideal for the background but 
that should, by my reading, put everything in front of the screen, when 
viewed. Using a toe in  you define the plane of the screen being at the 
look_at point.
To correct the keystone effect you could crop the images.

My rule of thumb is to have the cameras separated by the distance 
between your eyes in Pov units. About 2 to 3 units if your scale is 1 
unit per inch.

Having said that I still cannot make up my mind which is the best way to 
do it. It is not helped by using shutter glasses. The software that 
displays the Stereographic images allows me to adjust the separation or 
alignment. I created an animation where I moved the Look_at point from 
foreground to background. The effect is like a zoom.
Here are a couple of images with the Look_at at the female model.




> I'm happy with my 3d effect, although not always with the subject matter
> ;-)
>

You're just fishing for complements. :-P
Your images are peerless. :-)



-- 

Regards
     Stephen

Post a reply to this message

Attachments:
Download 'look_at_01a_l_0055.jpg' (484 KB) Download 'look_at_01a_r_0055.jpg' (488 KB)

Preview of image 'look_at_01a_l_0055.jpg'

Preview of image 'look_at_01a_r_0055.jpg'

On 3/14/2016 11:33 PM, Stephen wrote:
> I created an animation


Thanks to Bald Eagle for reminding me about VideoMach.

-- 

Regards
     Stephen

Post a reply to this message