Monday, March 17, 2008
New Stereo Pair technique
Sample image for Parallel vision method.
I had an idea, how to create stareo pair images from
2D data by using real 3D software.
First the grayscale image, with suppressed stars, is turned to hight map
by using shades of gray as an indicator.
Based on this model I created 3D mesh. Original image with color information is then
projected to this surface.
After that I'm able to take images from this object with small angular difference.
Now I have two images and needed spatial information.
An other new innovation was to use several iterations of "minimum" command under PhotoShop to select stars with different brightnes.
now it's easy to manipulate star distance accuratetly.
Sample image for Cross Vision method
PARALLEL VISION ISTRUCTIONS:
In parallel freeviewing the image for the left eye is on the left and the image for the right eye is on the right. You stare into the screen so that your eyes are aimed (more or less) parallel. As you stare into the screen you will get double vision as each eye sees the L & R images separately. When you are staring in at the right distance the middle two images will overlap and become 3d. The outer two images will remain and will still be 2d. CROSS VISION INSTRUCTIONS: In cross eye freeviewing the image for the left eye is on the right and the image for the right eye is on the left. You stare at a point about 1/2 way to the screen so that your eye's gaze is crossing at the half way point. Thus the left eye sees the correct image which is on the right. As you cross your eyes the image will go double. When your eyes are crossed the correct amount the middle images will overlap and be in 3d. The two outer images will remain and will be in 2d.
Sunday, March 16, 2008
NGC 4216 & friends
This image is from same night than M51.
In this area, there is so many dim edge on galaxys for some reason.
At the time I shoot this group, the elevation was low, between 24-30 degrees.
That has some effect to the sharpness, but there is still some details visible in central galaxy.
Just above NGC 4216, there is a Bluish object. I was not able to recodnice it. It could
be a comet? At the time span of 2h 45min. it does not appear to move, or it moves very
small amount. (I think there is some minor trailing visible in the closeup image)
Exposures:
11 x 900s = 2h 45min. + Flat and Bias farmes
Telescope:
LX200 GPS 12" + FR f6.4
Guiding:
SXV-AO and LodeStar guider
Object I ment in previous text is marked here with lines
UPDATE:
This is fast!
I just uploaded the image to the Cloudy Nights forum and right a way
FrankZ posted information about this object!
"TheSky 6 tells me that this is IC 771 (PGC 39176)!
Type is spiral galaxy. Found in the Catalog of principal galaxies (PGC)."
Thanks a lot Frank!
Saturday, March 15, 2008
M51, Whirlpool Galaxy
M51 is a bright (as a deepsky object) galaxy located in Canes Venatici.
Distance from my home town Oulu is about 23 miljon light-years.
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I had hard time with dimmer parts doe the light pollution,
IDAS LP filter helpped some, tough.
Image is scaled down 50%.
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Exposures: 12 x 900s =3h
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Telescope: Meade LX200 GPS 12"
Friday, March 14, 2008
M13, Stereo pair
As a SH2-240, Globular Cluster M13 is too a three dimensional object floating in space.
This image pair shows the "true" nature of this object.
Read viewing instructions from previous post.
Parallel vision Stereo Pair
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