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Originally posted by ArMaP
reply to post by arianna
In most cases that's because they adjust the image for the full view, including dark and bright areas.
Limiting the adjustments to the areas we are interested in makes it easier to get a better image.
You can even try to make a HDR image by using several versions adjusted to different brightness levels.
That cannot be a real 3D image, because if we use two images that look the same we will not get the 3D effect, and with only one image the only thing we can do is change one of the images to create a fake different perspective, but as it is based on the same image, all relative positions of all the objects in the image are the same, not giving a real depth perception.
Originally posted by arianna
A 3-D image for a distant view, such as looking at the surface of the moon from 14 miles above the surface, can be produced from a single image.
That's why they do it in a different way, either taking two photos in different orbits or by using the method used by Mars Express, that uses two different CCD lines pointing in different directions, as you can see here.
Imagine being at this distance from the surface, would a camera shift of 3/4 ins to capture another image make any difference? I think not. The two images of the surface would look the same when captured from a distant viewpoint.
That's our brain, once more, getting some new clues from the depth perception and giving us a slightly different interpretation of the image.
Also, I have noticed that the 3-D versions tend to show a clearer view of objects on the surface.
Yes, but it depends on how its done.
Originally posted by Malkuth
ArMap. Did I understand you correctly to be of the opinion that if an image manipulation has removed actual data that you might regard the results of such a process as being deficient?
I think that's the problem; if things appear when some enhancement is done then it means that they were already in the original, even if the manipulation transforms it into something different.
Originally posted by arianna
It is only when the 'embedded' data, which is not visible in the original, is improved and enhanced can a realization of what is really contained in an image be acheived.
Originally posted by ArMaP
I think that's the problem; if things appear when some enhancement is done then it means that they were already in the original, even if the manipulation transforms it into something different.
Originally posted by arianna
It is only when the 'embedded' data, which is not visible in the original, is improved and enhanced can a realization of what is really contained in an image be acheived.
I know that, I have a sister that is a professional photographer.
Originally posted by arianna
The similar darkroom process is called "burn-in" where more light is allowed to darken certain areas of the printing paper. The process in digital image processing is a very similar process.
It destroys data when the value of the pixels reach the limit. Imagine that you have a small square image with four pixels, two bright and two dark, and the dark have values of 10 and 15. If you use the tool too much, both pixels will be turned into 0, so you have lost the information that they had different values, and nothing can get that back (besides the "undo" feature ).
For the majority of the enhanced images I have posted on the forum the "burn" tool was applied and set to 'shadow'. The process does not actually destroy the data but makes it darker.
I am yet awaiting to see why do you consider those things as structures.
Originally posted by arianna
Do not be surprised if you observe anthropomorphic heads and faces which are forming part of the main structures. These shapes would appear to be associated with the inhabitants artistic and cultural identity.
That face you circled in the lower left, after I flipped it vertically I thought I had seen a similar face before....oh yeah... this one:
Originally posted by arianna
In this view I have circled many of the surface features.
Within each circle or ellipse there is something of significance to observe.
Originally posted by Arbitrageur
reply to post by arianna
Via the pareidolia effect, in the area I circled, I see two eyes, a nose, and a mouth with a cigar sticking out the side of it. The eyes are actually more like eye sockets, sort of like in a skull. You don't see that too?
Where are the structures?
Here's what structures look like from the air:
www.superstock.com...
I don't see anything like that, do you?
Perhaps you're right about that.
Originally posted by arianna
Your image is not a very good comparison with the lunar example. See if you can find a lunar sample image with the clarity of your posted view.
The first image I showed wasn't a top down view, it was an oblique view and you didn't like that one either.
Originally posted by arianna
reply to post by Arbitrageur
Unfortunately the GE image you have shown is a top-down view and not an oblique view therefore, the image cannot be used for comparison purposes. Sorry.