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originally posted by: dragonridr
a reply to: JamesChessman
There was no luring added the object is just very small and the camera has difficulty focusing. What people aren't getting is it's about half the size of a penny. Nothing at all like coral.
originally posted by: JamesChessman
1. Why exactly are these called "raw images."
Are they literally the same exact images snapped by the rover? Same exact resolution etc.?
The MAHLI is capable of producing images of three formats: raw (no RGB interpolation, no compression), lossless predictive compression (no RGB interpolation, approximately 1.7:1 compression), and JPEG (with interpolated color). The amount of JPEG compression can be changed from essentially lossless to very lossy. Operationally, most images will be returned as JPEGs because of their lower data volume. The compression factor is commanded from the ground and implemented as the image is acquired.
I just downloaded a shot that's 1584 x 1184.
So that's the same exact image, and same exact res, as the rover's camera?
Full-Frame and Sub-Frame Imaging MAHLI image size—the number of rows and columns of pixels—is nominally commanded in whole number multiples of 16. Full-frame images are 1600 by 1200 pixels in size or larger (the detector is 1640 by 1214 pixels in size; because of multiples of 16, the maximum number of columns is 1648 pixels). Sub-frames, if desired, are obtained at the time of photo acquisition. MAHLI cannot extract a sub-frame from a larger image after it is acquired. One important use of sub-framing is to couple it with an autofocus command to determine focus for a subsequently acquired full-frame (or larger sub-frame) image.
...So is this really just how the MAHLI camera works? Max res of 1632 x 1200... and then lower res for everything else when it zooms closer.
Is this accurate?
2. I'm also just trying to clarify the range of days that feature the Mars flower.
So far it looks like it appears on only 2 different Mars days. Sol 3396 through 3397.
So do you think that's accurate?
originally posted by: JamesChessman
By the way, that blurring problem is surprising for such a small object... isn't it?
originally posted by: MissVocalcord
originally posted by: JamesChessman
By the way, that blurring problem is surprising for such a small object... isn't it?
No it is not. It is not blurring, but a result of the focus used and it isn't surprising to the scientists working with it.
When you see parts of the image that are "blurred" you are in fact seeing parts of the image that are out of focus.
originally posted by: MissVocalcord
I don't know, the camera is capable of sending both real raw format images as jpeg compressed images.
originally posted by: JamesChessman
As I'm new to looking at NASA's raw images, I have a couple of questions that are probably redundant but you could probably help clarify:
1. Why exactly are these called "raw images."
Are they literally the same exact images snapped by the rover? Same exact resolution etc.?
originally posted by: ArMaP
a reply to: JamesChessman
I forgot to say that, by taking all those photos they can create a "focus stacked" image that takes all the parts that are in focus and creates a virtual image with everything in focus. We can do that in Photoshop, NASA (and anyone that wants to go to that trouble) can use special software created to do just that with the original images (if they are not JPEG).
Below is the result of stacking the photos used in the animation in Photoshop.
(click for full size)
originally posted by: OneBigMonkeyToo
I stitched some images together to show the 'flower' in its wider context.
originally posted by: ArMaP
originally posted by: JamesChessman
As I'm new to looking at NASA's raw images, I have a couple of questions that are probably redundant but you could probably help clarify:
1. Why exactly are these called "raw images."
Are they literally the same exact images snapped by the rover? Same exact resolution etc.?
Unfortunately, "raw" means whatever the people using that name wants.
With the previous rovers, for example, NASA posted JPEG images as raw images, although they were not, they were converted from the original format used by the rovers to send the data back to Earth into JPEG images without any processing (the conversion was automated), so they considered them raw images.
The real raw images are, usually, in a format that is not readable by common image processing programs (although some can be opened on Photoshop) but that allow metadata about the images (things like camera parameters, for example, on in photos taken from satellites, the altitude and angle of the camera) to be stored on the same file or on a companion file. That also allows higher bit depths (like 12 bits per pixel, something normal image processing programs cannot work with), so having access to those images is important to get the best quality images.
This system also allows other type of information to be used in the file, as those files really "explain" how they should be used to the software reading them.
PS: the fact that an image file doesn't have a familiar extension (or any extension at all) doesn't mean it's not an image file. Some common image processing programs are able to ignore the file extension and read the image type from what is called a "magic number", a sequence of values at the start of the file that show which type of file we are dealing with. If you open a JPG or JPEG image on a hexadecimal editor (a program that shows the values of the bytes in the file as hexadecimal representation) you will see that they all start with "FF D8 FF", and after that they have some other bytes to show which kind of JPEG the file is. A GIF file starts with "47 49 46 38 37 61" for the GIF87a version or with "47 49 46 38 39 61" for the GIF89a version.
originally posted by: MissVocalcord
originally posted by: JamesChessman
Yes, it's possible that the close-up shot, is made from the same original, as the landscape shot.
However, they still end up as 2 distinct, different images.
It is not completely clear to me what the original image was, since the seem to do composites of those images too:
mars.nasa.gov...
The close-up shot DOES HAVE BLURRING ADDED, which is not there in the wider shot.
I see I might have been wrong; there are quite a few images of that scenery:
Nasa
and you can find enough ones without "blur"
ibb.co...
The blur much more seems like a side effect from the camera itself
originally posted by: JamesChessman
Including because Google can't find such images, or see them, neither can Apple software etc.
originally posted by: ArMaP
originally posted by: JamesChessman
Including because Google can't find such images, or see them, neither can Apple software etc.
Google only shows what they want you to see (specially those that pay to be seen), they do not show everything that exists on the Internet.
As for Apple software, I don't know what kind of software Apple has that can find images, so I cannot comment (I don't have any thing from Apple).
originally posted by: ArMaP
a reply to: JamesChessman
You can see the best images here.
It's not the easiest site to navigate and you need some specific software to see the best images (they are not on a common format), but these are really the best images. They also have JPEG versions of the images.
Also, it's only updated from time to time (maybe three months, judging by the dates), so you will not find the most recent photos there now.
originally posted by: JamesChessman
originally posted by: ArMaP
originally posted by: JamesChessman
Including because Google can't find such images, or see them, neither can Apple software etc.
Google only shows what they want you to see (specially those that pay to be seen), they do not show everything that exists on the Internet.
As for Apple software, I don't know what kind of software Apple has that can find images, so I cannot comment (I don't have any thing from Apple).
Ok we are talking about the other thread here, I am aware that Google is selective in their results, it's not absolutely everything that exists online.
However, on the other hand, Google is considered the BEST search engine, and the fact is, Google could find a total of 3 images of the Mystery Hut. THREE images.
Meanwhile, Monkey etc. were swearing up and down, that there were something like TEN THOUSAND IMAGES published.
So this is not a matter of Google possibly not mentioning something obscure lol.
This is the difference of whether 10,000 images were published, or not.
Google can find 3 images.
There has been no evidence presented that there was ever anything more than 3 images published.
Plus, the Chinese website was very broken and nonfunctional. And it never even said that it offered images LOL!! It offered "data sets" with no images, and no mention of images, and the trolls were swearing that the "data sets" were images that nobody can see. Hmm, images that nobody can see.
Ten thousand images that nobody can see. Hmm.
Monkey etc. can argue for 6 months that such images exist but they refuse to SHOW JUST ONE of those images and prove they exist. Because they don't. Exist.
This is the thread that Monkey completely discredits himself, it's why I was surprised he popped up here immediately in the new thread, now suddenly he has all of NASA's images at his fingertips, but a year of arguing and he has never shown ONE of his magic Chinese images that he promises really really do exist...
www.abovetopsecret.com...
See the thing is, there's no such thing as images-that-nobody-can-see.
They are functionally not images, if nobody can see them...