what is the principle of 3D  scanner? what might be the cost of it?
818173
A 3D scanner is a device that analyzes a real-world object or environment to collect data on its shape and possibly color. The collected data can then be used to construct digital, three dimensional models that are used in a wide variety of applications. These devices are used extensively by industry in the production of such things as movies and video games. Other applications include industrial design and prototyping, computer vision and documentation of cultural artifacts.\n\nTwo types of 3D scanners are contact and non-contact. Non-contact 3D scanners can be further divided into two main categories, active scanners and passive scanners. There are a variety of technologies that fall under each of these categories.\n\nThe purpose of a 3D scanner is usually to create a point cloud of geometric samples on the surface of the subject. These points can then be used to extrapolate the shape of the subject (a process called reconstruction). If color information is collected at each point, then the colors on the surface of the subject can also be determined.\n\n3D scanners are very analogous to cameras. Like cameras, they have a cone-like field of view, and like cameras, they can only collect information about surfaces that are not obscured. While a camera collects color information about surfaces within its field of view, 3D scanners collect distance information about surfaces within its field of view. \n\nGood quality 3D scanner will cost you $ 2495.\nPl. visit:\nhttps://www.nextengine.com/indexSecure.htm
794359
I haven't used it yet but here is the link to get some free 3D software.\n\nhttp://www.anim8or.com
659926
there is hardware for this job, and it comes with its own software.\nYou need a scanner that has a slides tray.\nI've done this a couple of times and I used photoshop to\nretouch the scanned slides. The tray holds 20 slides.\nThe scanning plugin for photoshop (that came with the scanner) has functionality for slides and after scanning, \nit automatically creates an image per slide.\nIf you also use scripts to automate the saving, then converting slides to digital images becomes a pretty quick job.
269761
Each 2D image shows some crosse section of the subject, let's say a brain.\n\nSay the brain is 20 centimetes deep. If you obtain one image for each centimeter of depth, print them out, cut out the brain shape, and then place them all so they are standing vertically next to one another and in order you will have a very good idea of what that brain looks like in 3D.\n\nThe more pictures you take the more accurate your model will be. With enough pictures you can easily guess at what fills the empty space between them and make a complete and accurate 3D model.
340206
The scanner sends out a laser beam that reflects against the barcode on the object. The scanner is programmed to recognize the reflections of barcodes and use those to identify the product.
271303
There are many online scanners that you can use.\nBe advised that these are bandwith hoggy\nTrendMicro has been very reliable over the years.\nIt's online though so no dial up.\nThe Grisoft download is free for home users and works great.\nHope this helps
923259
SEM scans the surface of the object while in TEM the beam passes through the object\nTEM also have higher resolution
210577
distance measurements...btw...holographs have been developed (not the three beam version but the single immesion source)
857780
I don't know about the Best Scanner model in HP.\nHowever, looking at what you want to scan, esp. Jewellery, I would suggest you to go in for a Scanner that uses the CCD Scanning Technology.  It scans things very much a 3D Object.\nExample: If you keep any Jewellery, Coke Can, Wallet, Pens, anything and scan, it scans it very neatly.\n\nI had tested scanning a Coke Can with HP Photosmart C7180 All in One and the output was excellent compared with the other HP all in one's that uses CIS Scanning technology.\n\nCall up the HP Customer support and get the list of HP Scanners that uses CCD Scanning Technology and buy the one which has good reviews and the one which meets your price tag.\n\ncheers!!!
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Scanning gray scale by hand - Logitech ScanMan 256 handheld scanner - evaluation\nHome Office Computing,  June, 1991  by Steven C.M. Chen\n\n Save a personal copy of this article and quickly find it again with Furl.net. It's free! Save it.\nAT A GLANCE: Easy to use handheld scanner capable of capturing 256 levels of gray.\n\nDOCUMENTATION: Very good; explains all features and functions.\n\nSETUP: Straightforward, simple.\n\nVALUE: Excellent.\n\nSUPPORT: About average; prepare for a lot of busy signlas. Available via phone or bulleting board; both are toll calls.\n\nLIST PRICE: $499\n\nSTREET PRICE RANGES: $300-$350\n\nLogitech ScanMan 256 - scanning device - Hardware Review - Evaluation\nHome Office Computing,  Feb, 1992  by Steve Morgenstern\n\n Save a personal copy of this article and quickly find it again with Furl.net. It's free! Save it.\nThe Logitech unit is quite simply the best handheld scanner I've used--a combination of functional, innovative hardware design and powerful, easy-to-use scanning and image-editing software.\n\nThe size, shape, and feel of a handheld scanner matter a lot, and I find the Logitech unit fits my hand exceptionally well. To solve the common problem of the unit wiggling as you pull it across the original, the Logitech has been designed with one wide roller in the front and two smaller ones in the rear, providing a smooth, stable motion.\n\nThe second major problem with hand scanners is velocity--if you move the scanner too quickly (usually very easy to do), your results suffer from serious distortion. Logitech tackled this challenge with a Scanning Speed Indicator light that's clearly visible on the top of the unit. If you're moving at an appropriate speed the indicator glows green. Move a little to quickly, and it turns yellow. Exceed the speed limit entirely, and it turns red, indicating that you'd better start over.\n\nAnother smart design decision is the use of a single press of the scanning button to turn the unit on and keep it on until you indicate completion of your scan by hitting the keyboard Return (or Enter) key. Too many handheld scanners expect you to hold that button down throughout the scan--and that constant pressure makes it too easy to move the scanner off course.\n\nThe other key to Logitech's success is the Ansel image-editing software included with the unit. Running under Microsoft Windows 3.0 (which must be purchased separately), Ansel combines basis ease of use with several powerful filtering commands. I have been able to dramatically improve scans of mediocre originals by employing. Ansel's Smooth, Sharpen, and Equalize commands.\n\nThe only negative involved in using the ScanMan is the size of the unit--its scanning width measures just 4.1 inches across. Ansel does allow you to "stitch" two separate scans together to create a full-width image--it works reasonably well with line art, but photographs are more problematic. As long as you're working with reasonably small originals (snaphsot-size photos or modest-size clip-art images), though, the ScanMan produces remarkably high-quality output at a very reasonable price.\n\nCOPYRIGHT 1992 Freedom Technology Media Group\nCOPYRIGHT 2004 Gale Group
880734
Well, the first cheap (as in free) 3D modeling program that comes to my mind is Blender, which is available for several platforms. However, you may or may not find the interface kinda weird to use, depending on what you've used before.
964951
I believe that you are referring to a stereo-microscope. Generally stereo-microscopes have low magnification and are used for the study of macroscopic 3-dimensional objects like insects. Hope this helps.
734133
Yes.  I have a Canon flatbed scanner that is capable of scanning b/w or color negatives.  I scan it, then print it out on my photo printer.  There are more expensive scanners that are strictly for negatives.  But, since I rarely scan negatives, I went for a $100 scanner.  This was several years ago.  These days, I am sure you can get the scanner for much cheaper.\n\nI use Photoshop to touch up the photos, if necessary, such as scratches or dust in the photos.
86975
You can try Irrilicht or Ogre. Search for them using yahoo search engine. You should also have some knowledge about 3D programming.
913865
http://www.webreference.com/3d/ Try that, good luck with the assignment.
90931
use the flat bed feature if your scanner has that.  Set the scanner for high resolution. Save as a .jpg file
1167272
You can buy a simple Radio Shack police/fire scanner. Essentially the same thing, but a much lower price.