network scanners – What are the advantages of port scanning?

I can open a locked 2000 VW Golf with a flathead screwdriver. I want to steal a car, so I walk through a car park with my screwdriver looking for Golfs. I do so by looking in each parking space.

I’m not looking for the parking spaces, I’m looking in each parking space to see if it has a 2000 VW Golf. Once I find one, I can exploit the door lock’s vulnerability and unlock the car. I could wander around the parking lot in the dark and blindfolded, jamming my screwdriver into anything that feels like metal, but that’s just silly.

Port scanning identifies network services running on a host so that the attacker can exploit vulnerabilities in the service. (source) Trying to run random exploits on random ports is just silly.

scanning – Is there a way I can scan an A4 photo at 4800 dpi?

Is there anyway to bypass this, how could I scan the entire A4 photo at 4800 dpi?

You cannot bypass the limitation. As Zeiss Ikon states, you can scan several pieces and stitch. However, my personal attempts at doing so have been disappointing in terms of both wasted time and image quality (stitching artifacts).

… would it not be a software restriction rather hardware related?

Your scanner has a Contact Image Sensor (CIS). The sensels run the width of the scanning area and are positioned close to the surface they are intended to scan. To achieve 4800 DPI, a portion of the sensor likely has a higher density of sensels. There would be no way to scan at 4800 DPI outside of that area.

Other scanner technology use lenses and small, linear sensors. The sensors have fixed size and sensel density. To achieve higher DPI, the scan area has to be reduced because the sensor cannot be changed.

Many scanners allow higher resolution settings than the hardware is actually capable of providing. This is done via interpolation. If such solutions are sufficient for your needs, you can achieve the same results by resizing lower DPI scans in any image editor.

Most prints do not provide detail beyond ~300-600 DPI. Since you are scanning toy boxes, most of what you would be capturing is the halftone pattern.

Depth of Field for scanning 35mm slides on flatbed scanners (Epson)

I have both an Epson V750 and V850 scanners and am trying to digitize a large amount of slides.

The software for scanning does great for color restoration (slides dated from 50s on) but the issue is focus. Slides are from film that ranges from PolaChrome, KodaChrome through Agfa and others. Mounts range from “factory cardboard” through “factory plastic” through after-market snap slide mounts.

I mention all this because all these factors seem to impact slide position in a scanner as far as focus and DOF (differing thickness, clamping, centering) as well as how “warped” the image is in the mount.

I used a set of 12 varied images for some testing in both and found that the DOF in both scanners appears to be less than the thickness of two layers of film. I can find no way to enlarge that and that indicates to me that this is way more of a issue than I had hoped. If that is true, then I think my only option is to create a test matrix for each scanner that cross references – film type – film age – mount type – film warp amount – scanner holder setting – and then use that to scan based on those parameters.

Am I missing something?

Just to scale the “job,” this is for 22,000+ images accumulated over the last 60+ years


I had used the 750 several years back for a 200+ slide effort for a friend and even with the “Unsharp Mask” the results were not up to the originals but worked for the low resolution video we produced, so the base question still remains, what can be done to improve the DOF for the scanners? If nothing, then I will again abandon the scanners. As far as dedicated film scanners (Nikon-Coolpix/etc.), I have tried at least five over the years and all with limited success (jams every night, no batch film warp compensation, batching scans by mount, film type, age, etc. creating a post scanning organizational issue) for any volume.

Since these are great slides with considerable detail, I have recently invested in a 50+mp Canon with a top of the line Macro Lens and tried to duplicate that way, only to have to send the body in for maintenance as the focus prism and the film plane did not match. So am awaiting return of that for a second round of tests. Did not want to bring that into the scanner topic but thought I would respond to BobT.

The Epson scanner does such a great job on initial scan correction range, but if the focus is still going to be a hit and miss based on the limitations of the technology, then I really would like to “put that to bed” since it appears to be unsolvable at volume.

I appreciate the input of others, but if the scanners are “doing their best” and that is not acceptable, then I will put my efforts on the the camera (to achieve the best focus) and eat the time for “all the corrections” needed for the “age range and variations” of the originals. I will post again when the body comes back and I can run yet another test.

dslr – Cheapest camera possible to use for “scanning” slides using a projector and a camera

I’ve recently decided that my parents would love to have their slide collection in digital format, because being on slides means they are never looked at- most are older than I am, yet I don’t think I’ve ever seen any of them.
There’s a lot. Probably over a thousand. The cheapest I found to scan them was .25$ a slide and most places charge around $1. I have an industrial scanner that scans paper SUPER fast, but that doesn’t help with scanning slides. I researched the available scanners for sale and seem to have found that if you want any sort of batch capabilities, you have to pay $600-$1000 at least.
I did find ONE scanner that was $250 which had a 30 slide batch tray, but I can’t say that I believe it could possibly work well, but I have no idea.
I happened across the idea of using a slide projector and carousel to backlight your slides and a mounted DSLR camera with a macro lens pointing into the projector lens. The one I found even made a little circuit to sync the camera shutter with the next slide button on the projector.
Scans around 1 per second, much more acceptable than 1-3min per slide.

The quality seems acceptable from the examples I’ve seen online; in fact, the quality could be considerably less and it would be just fine. Most are not even pictures in which the quality is of that much concern- maybe a few scenery pictures, but most are of people and weren’t necessarily the highest quality pictures in the first place.

That being said, I want to do the projector/camera thing because it is quick and seems to provide everything I’m looking for FAR cheaper than buying a scanner that will do it, or paying a service. Only problem is that I don’t have a DSLR body NOR any lenses, macro or otherwise.

So I would have to buy a DSLR body and macro lens. This is not a bad option because after I am done scanning, then I will still have a DSLR, though I’ll probably want some other lenses. However, a DSLR and lens are not exactly CHEAP; I was hoping to only spend around $200-$300 on this project.
Are there any DSLRs out there (and lenses) that would suffice for the job at hand for around that price? My research seems to say that I am going to pay at least $500 to even get one at all. That’s cheap, even. Which would be cool, since I’d use the camera after scanning the slides, but I just don’t have that much $ right now.

Also, someone suggested that I try using the slide projector to project onto a screen (which I DO already have) and then just set up a tripod and take a picture of the screen. Would this work? Remember, I don’t really care about things like proper color representation or high resolution, but I WOULD like to capture the entire slide uncropped. Also, I wouldn’t need a macro lens; in fact, it would seem to me that I could just use a regular point and shoot camera so long as it was of enough quality to allow me to set the F-stop, apeture rate, etc… it would also have to have a “remote” for snapping pics, as the electronics to sync with the carousel use it.
Thanks in advance. 🙂

Edit on August 8, 2020 : Well, I have finally found a solution; I just purchased a Nikon D5000 body for $50 and I have this Ambico Deluxe video transfer system contraption I picked up for $7 which is designed to transfer slides to VHS via a camcorder and I am pretty sure I can put it all together with a slide projector and make it work! Once I get everything and give it a shot, I’ll return with details if everything goes as expected.

text – What are user friendly ways to display XML for reading & scanning

My immediate idea is to use an XSLT stylesheet to transform the XML into a HTML document which you can then visually style any way you want. That way you can show them eg. tables and datagrids instead of raw XML. But considering that you’re developing this for system admins, you may not have to go that far as it’s likely they’re already familiar with XML. One thing to keep in mind is that you should develop the right interface for the right audience. So if they already grok XML, don’t worry about oversimplifying things.

In my product, Handcraft, we provide an option called “focus on writing” which is intended for copywriters and other non-technical users who would like to edit the copy of a HTML prototype. The mode fades out all XML nodes and just keeps text opaque so you can still understand the structure if necessary but aren’t distracted by it and can just focus on writing copy:

enter image description here

You could consider doing something similar where you display the XML as normal but only highlight certain parts that you want them to look through (using XPath, for instance). Having said that, SOAP remains barely legible as it is, so there’s definitely a challenge there. Good luck!

35mm – Batch Scanning / iPhone apps?

I’m a photo editor that’s been employed to work on the archive of an American music photographer from the 1960s.

My first task is to deal with over 20,000 35mm negatives.
The plan is to scan them all for reference purposes, just so we can view the archive in its entirety. The quality is not important.

My inclination is just to use an iPhone film-scanning app to do this.
It seems like it’d be fast (time-efficiency is a priority) and and also very easy.

I just wanted to get a few 2nd opinions?
Have any of you used such apps before?
Would you recommend an alternative means of scanning all the negatives?

Thanks so much!

Carlos

Can I use my Canon Pixma AiO printer for scanning film?

I would like start scanning 120 and 35mm films, but my flatbed scanner (Canon Pixma 9155 AiO printer) doesn’t officially support this. It doesn’t come with a film holder, the software doesn’t support this and I also cannot remove the reflective sheet from the scanning unit since it’s glued on. I would really hate having to buy a film scanner for the few rolls of film I shoot.
Is it possible using some low cost, low effort hacks to still get decent quality scans?

networking – Discover IPMI IP address by scanning all possible direct LAN addresses

I have a Supermicro server board that powers on but wont post.

I have connected a LAN cable to the dedicated IPMI LAN port on the board and am trying to discover what the IPMI IP address of the board is.

I have tried scanning the local network via:

nmap -n -sP 192.168.1.1/24

However I as the server is not connected to anything other than a laptop via IPMI it does not know it’s on the local network, and I have seen SuperMicro IPMI addresses around 172.17.x.x.

I have not been able to find a list of all possible IPMI addresses to narrow down. How can I scan the entire 172.x.x.x address range using nmap? or any other ideas for finding this server via direct connection to an IPMI port.