Introduction / How to Scan Images
Subtitles of the Movie
Now scanning images is really very, very easy. When you install your scanner it will come with software that will operate the hardware during the scan procedure. Now one word of warning, scanner software was really built for the complete novice in mind. It will automate the process, making its own decision about cropping, about resolution etcetera, but you do not want to use the automated process when you are scanning for precision and high quality. I mean if your kids were scanning their homework or something like that, then maybe you would do it on automated, but you and I, let us do it totally manually. Now my scanner, I must admit, is a two year old Epson Perfection 1650 which cost about two hundred dollars when I bought it, but it can now be had on Amazon for about fifty-nine bucks. It is a discontinued model but it still is a very good scanner, it takes a beating and keeps on scanning. I am very happy with it. Again when you go to scan an image in Photoshop, you go up to file, click on file, go down to import, and this is where your scanner software will be located, and in my case I click on the Epson Twain, and when the software loads it will do an automatic prescan of whatever happens to be on the flat bed of the flat-bed scanner. Now this is a photograph of the entire flat bed, if we are going to do a scan without doing any cropping it will give you an image of the entire flat bed with the photograph as part of the resulting image, which is what you do not want. See you always need to crop, go to crop image over there and do that, you get your ants marching and then you come over here and these are all the controls for what the resulting scan might look like. Word of warning, this area down here, most scanning software of any decent scanners is going to have the ability to adjust the color, adjust the gamma and the contrast and all that, do not do that in your scanner software interface, alright? Do that in Photoshop, the results you get from these things are awful. Now here appears the scanner mode, this is flat bed, this is the negative film, positive film, and do not use flat-bed scanners for slide and negative scanning, they just will not give you the results. This is the drop-down menu that gives you the various modes, forty-eight bit color photo, twenty-four bit, when you click on these the image will actually change to give you a little idea as to what the output is going to be. Be it a color document, black and white photo, sixteen bit, there is an eight bit photo, black and white document again, illustration, line art, text with background removal, this is really kind of a cool tool. One thing that Epson did on this is if you are scanning newspapers, newsprint has a tendency to bleed through from one side to the next, so if you are going to scan something out of a newspaper, inevitably your scan will also pick up that artifact from the opposing page. And this particular piece of software will remove that artifacting, which I have used and it works great, so it is there if you need it. Alright, so we take it back up to forty-eight bit color, resolution is set at three hundred, there might be a reason to scan it at six hundred if you are planning to do some detailed work on your resulting scan but if all you are going to do is scan it, and color-correct it and output it, then just do it at three hundred dpi, because you are not going to get any better quality from your scan going any higher in resolution. The actual size of your output can be adjusted this way and you know, if you've got an HP scanner or a Canon or whatever it happens to be, you will get similar software with an interface that does most of these things. For our purposes today, we are going to leave this at a hundred percent, and again do not mess with the stuff, it is useless. Right now we are just going to go ahead with the scan, and you are always going to notice that some programs can't accept above a twenty-four bit scan, but Photoshop goes all the way to forty-eight so you are in good shape. Then when the scan is completed you just close out the scanner interface software and there is your picture. Anyway, let us take a look at this photograph for detail, see what we have got, pretty good, I do not see any noise anywhere. Let us go over here and check it for noise. You can always look at the dark areas of your photograph for noise, I do not see any in this particular exposure; let us adjust the brightness, I'm always in the habit of doing it with this particular control, and there is no noise. There is no noise, there is a little bit, I mean, I doubt that you would be able to see it in this tutorial but I can see ever so slight hints of horizontal banding and when you see this noise, this is off the print; This is not what is referred to as scanner noise, okay? There is some noise in there, but it is very low. For a flat-bed scanner that is not bad at all, definitely acceptable. There you have it, scanning, about as easy as it gets.
Tutorial Information
| Course: | Adobe Photoshop Image Restoration |
| Author: | Phil Hawkins |
| SKU: | 33473 |
| ISBN: | 1932072705 |
| Release Date: | 2004-01-27 |
| Duration: | 4.5 hrs / 77 lessons |
| Captions: | For Online University members only |
| Compatibility: |
Vista/XP/2000, OS X, Linux QuickTime 7, Flash 8 |
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