Non linearity between pixels and widht for linescan

Hi
I'm developing a width gauge based on a linescan camera.
The gauge is measuring the surface of a steel strip moving at 200m/sec.
I found a non linearity between the relation of pixels and real widht:
1904mm X 6635,6pixels
1308mm X 4616,7pixels
814mm X 2880,6pixels
I've tried the working distances between 2600 to 2800mm.
The field of view is 2200mm.
The focal lengh is 35mm.
The size of CCD is 28.67mm (3.5um X 8192pixels - Basler raL8192-12gm).
Somebody already faced this problem?
Thanks,
Alexandre.
Solved!
Go to Solution.

Hi Greg
Thanks for your idea. I implemented a polynomial from Excel according the attached. It's running well until now.
Another problem that I'm facing is the oscilation on the image (https://www.dropbox.com/s/cboyglx74g8sd93/width%20gauge.mp4?dl=0) when the grid and filter are applied. I would like get stable the filtered image and grid from edge detector.
Does anyone know how to solve this?
Thanks for the moment.
Attachments:
calibrcurve_ml2.xlsx ‏20 KB

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That weird work-around is indecipherable to me (column less than a character width??) -- would you care to explain it in the context of this thread?
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Maybe the truth came out in that thread. Framemaker, as it was originally conceived by the original developers, DID allow correct page flow for parallel columns -- but once Adobe got it, they killed that ability, dumbing it down to InDesign's level, which cannot do it. Peter so much as admitted to that fact on that thread, that somewhere in the versions, this feature was killed. Which confirms the above paragraph.
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In FrameMaker, as in InDesign, as in PageMaker, as in QuarkXpress, you draw text frames on document pages, or on master pages, using a text frame tool. It's named differently in each application.
The tools are for users to apply their vision and creativity, so if you need a certain kind of layout, you need to lay it out yourself. If your particular layout were common, there would very likely be at least one template for available in each professional publishing tool's community.
Why should I even consider FM 9 ?? Adobe wants $1000 bucks for it -- they brag on its "improved features for book production". What a laugh! They can't even conceive of scholarly comparative books across a HUGE gamut of subject areas -- so why should I consider it ?? I'd love for someone to tell me: "YES !! I am proud to announce that FrameMaker can do this natively out of the box !! " But I don't see it coming, do you?
Professional tools cost huge money to develop. If you use them professionally, your work should bring in the revenue to pay for the tools.
As has been said by many posters on many threads in regards to most software, especially the professional tools, it's very unlikely that you'll find a legitimate copy of a past version for sale. The older the version, the less likely there will be a legit copy on some dealer's shelf that pops up, and is put on eBay for a song. It's illegal to sell old versions that one uses to upgrade to a new version. You'll not be able to register the license; in recent versions of Adobe products, you won't be able to use the software at all after the trial period expires, without a valid license.
Using a license cracking tool is also illegal.
It sounds as if your hardware and Windows version limitations are constraining your software choices. It's a tough set of choices.
Oh, BTW, here's a link to a PDF of a FrameMaker example of what I think you're talking about:
http://dl.dropbox.com/u/363247/fm%207X7%204-parallel%20flows%20across%20same-side%20pages. recover.pdf
EDIT:
In the PDF, the small fragments of text are the "pass-through" threaded frames that Arnis described. They're larger than a single character, so you can see the text flow through; in real use, they should be teensy.
/EDIT
It's trickier in InDesign because it's built-in ability to create new pages as stories grow is trick to accomplish the same behavior. The In-Tools plugin that was mentioned can do this.
If you're persnickety about typographic control, InDesign is the better tool. FrameMaker isn't a slouch, it's just that InDesign's been bred for the task.
Regarding lining up the text across columns, InDesign and FrameMaker both can control baseline alignment. You'll need to try out both tools to decide which works the way you need.
HTH
Regards,
Peter
Peter Gold
KnowHow ProServices

Non linearity between pixels and widht for linescan

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