Embedding camera readable data on an image [closed] - image

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I have a set of images on a data set and I want to create an application(on android initially) so that the application would be able to take an image and match it with an image on my data set. I tried using image recognition algorithms but I had very poor recognition chances. Is there any way to unobtrusively embed data on the image itself such that when a printed version of the image is scanned by the application, it would be able to extract the embedded data? I need some direction in this regard because I seem to be punching in the dark since I haven't worked on anything like this before.
Thanks

You can try with OpenCV4Android, here is the introductory tutorial. Following SO will give you some more- Looking for OpenCV android tutorial

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How to display value instead of percentage in pie chart in Kibana? [closed]

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I'm trying to setup a kibana pie-chart visualization. By default it shows the relative percentages of the terms (=slices). Is there a way to display only the absolute values (e.g. document counts) instead of the percentages?
I'm using Kibana version 7.1.
Unfortunately this is not possible as of today.
Looking at this discussion it was not possible in October of 2018.
There is an issue on github that addresses exactly your need, but it is still open.
However you can still see the absolute value by enabling the options displayed in the following picture and then hovering over the slices:
As an alternative you could setup a simple data table to display the absolute values like so:
Hope this helps.

How to remove freezes which are called by image decoding [closed]

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When i start moving in game, i see some freezes, that happened only once, after recording with dev tools, i saw that freezes are called by Image Decode(as i understand it's decoding textures for my geometries). So is there any way to "precode" images, and start game without that freezes?
recorder screen
One solution to mitigate this problem is the usage of ImageBitmap. With this API, the image decode is going to happen in a separate thread without blocking the animation loop. In three.js you can use ImageBitmapLoader as a more performant substitute to ImageLoader. Have a look at the following example to see the loader in action:
https://threejs.org/examples/webgl_loader_imagebitmap.html

How was this animation made? [closed]

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i found an interesting effect on this site: https://iohk.io/
If you move your mouse around the effect will follow and change its colors, im really fascinated and wonder if there is a term for this kind of effect i can look into so i can learn how this was done.
While checking the source code i found the term "canvas", but its a huge topic.
Im not a developer myself and only know HTML/CSS right now, so please keep this in mind when answering.
Thanks in Advance.
http://vincentgarreau.com/particles.js/
That is the site from the creator, i haven't look in to it that much but all the information you need should be there.
You can use the menu to the right to change the way it looks.
Having looked at the page I initially thought of WebGL. On inspecting the page my suspicions were confirmed.
The page you linked to is using a ParticlesJS which looks like a library over WebGL. Given you are not a developer then this may be a little beyond you.

Trouble identifing this barcode, using zbar and redlaser [closed]

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So I've got this barcode (which I will attach) and I don't know how to decode it, both zbar on my desktop and redlaser on my phone cannot read it. After a lot of googling, and reading on forums I can't find similar barcodes... Any suggestions?
https://dl.dropboxusercontent.com/u/13940239/2013-04-30%2009.36.28.jpg
Sorry I realised I needed a higher repuation to post an image, here is a dropbox link
After identifing the barcode, can anyone help with zbar decoding the barcode. I'd like do set this up so the software will decode similar barcodes...
It is a Code 39 barcode with a 3 bar widths char gap, which reads '1004876532'. Almost any standard bar code reader should be able to read this type. This online bar code decoder was able to read a cleaned up version of the image you originally posted.
*the yellow arrows represent the 3 bar width character gaps.
it seams to be Code_39 format, value: 1004876532

User avatar dimension standards or specifications [closed]

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We have seen a user avatar will have different sizes on Facebook, Twitter, etc.
For example, Twitter has 3 different avatar sizes: 24x24, 48x48, 128x128; Facebook mainly has 50x50 and 180x180>.
I am wondering if there is a standard thumbnail size that a website should adopt, or it's all solely based on the design?
Thanks.
Like you say its just down to the design of your site. If in doubt, adopt the same resolution as a big player like Twitter, and allow users to upload a larger image which will give you the flexibility to show a larger version if someone clicks through to their profile.
I found this page to be most useful.
https://en.gravatar.com/site/implement/images/
I plan to allow users to upload their own larger image and using similar rules as above, any dimension within range requested will auto generate the size for that image. So no matter if I want 50px or 51px, my site will generate the first request.
Obviously that requires software custom or other and is out of scope of your tags.

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