Invisible QR codes.

[payb.tc]

Storing a whole business card in a picture readable when offline would surely distort it much more.

How about a vector image?

I don't understand. The difference between vector and bitmap is only in the storage format. QR-like codes work even after printing when the storage format is "ink on paper".
Sure in an SVG you can embed arbitrary information. You can add a whole book without violating the SVG standard and without distorting the image's visual representation

Check it out. It's 3.9MB and for convenience I put the bible as the title but other and new tags are perfectly allowed in the standard:

i thought bruno was saying "how about embedding a vector image into the photo, instead of embedding text data".

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[giszmo]

Storing a whole business card in a picture readable when offline would surely distort it much more.

How about a vector image?

I don't understand. The difference between vector and bitmap is only in the storage format. QR-like codes work even after printing when the storage format is "ink on paper".
Sure in an SVG you can embed arbitrary information. You can add a whole book without violating the SVG standard and without distorting the image's visual representation

Check it out. It's 3.9MB and for convenience I put the bible as the title but other and new tags are perfectly allowed in the standard:

i thought bruno was saying "how about embedding a vector image into the photo, instead of embedding text data".

Well, svg is "text data". Am I missing something?

[payb.tc]

Well, svg is "text data". Am I missing something?

oh, i didn't know that.

(but i'm looking at your SVG code now on my phone, thanks)

[giszmo]

i'm looking at your SVG code now on my phone, thanks

I realized that it is maybe non-trivial to get the qr-code into an svg-file.

In order to get a rather small qr-code I stripped a lot of meta-data from the original svg-file as it came out of inkscape.
... uhm ... opening the file on my desktop works. In the browser it doesn't. Crippled too much, but you get the idea

Here is the svg:

Code:

<svg width="157" height="29">
<g transform="translate(-121,-116)">
<text style="font-size:40px;">
<tspan x="167" y="144">See?</tspan>
</text>
</g>
</svg>

[idontknow]

Can you show us the original SVG file for comparison or is it too big?

[giszmo]

Can you show us the original SVG file for comparison or is it too big?

Nah, it's not "big" at all. I stripped just everything that looked like "extra" (namespace sodipodi and inkscape) or "default" (color:black), ids and some numbers precision. Probably adding back the first line would make the svg work in the browser:

Code:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->

<svg
   xmlns:dc="http://purl.org/dc/elements/1.1/"
   xmlns:cc="http://creativecommons.org/ns#"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
   width="156.08125"
   height="28.16"
   id="svg2"
   version="1.1"
   inkscape:version="0.48.1 r9760"
   sodipodi:docname="New document 1">
  <defs
     id="defs4" />
  <sodipodi:namedview
     id="base"
     pagecolor="#ffffff"
     bordercolor="#666666"
     borderopacity="1.0"
     inkscape:pageopacity="0.0"
     inkscape:pageshadow="2"
     inkscape:zoom="0.35"
     inkscape:cx="-267.49143"
     inkscape:cy="-388.17143"
     inkscape:document-units="px"
     inkscape:current-layer="layer1"
     showgrid="false"
     fit-margin-top="0"
     fit-margin-left="0"
     fit-margin-right="0"
     fit-margin-bottom="0"
     inkscape:window-width="1112"
     inkscape:window-height="740"
     inkscape:window-x="134"
     inkscape:window-y="155"
     inkscape:window-maximized="0" />
  <metadata
     id="metadata7">
    <rdf:RDF>
      <cc:Work
         rdf:about="">
        <dc:format>image/svg+xml</dc:format>
        <dc:type
           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
        <dc:title></dc:title>
      </cc:Work>
    </rdf:RDF>
  </metadata>
  <g
     inkscape:label="Layer 1"
     inkscape:groupmode="layer"
     id="layer1"
     transform="translate(-121.06286,-116.03076)">
    <text
       xml:space="preserve"
       style="font-size:40px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:LMSans8;-inkscape-font-specification:LMSans8"
       x="117.14286"
       y="143.79076"
       id="text2985"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan2987"
         x="117.14286"
         y="143.79076">Die Bibel</tspan></text>
  </g>
</svg>

[HostFat]

I like the idea of a "virus" that puts hidden QR-codes everywhere on images

[BitcoinPorn]

Cool idea but looks like marketing it will be tough.

Yes, seems like fun for creative people though.  Finding ways to get people to scan a part of the page that shows nothing, which is good for actual conversions of qr scans. The bad part being them having to download an extra app to do it though.