I am looking for encryption mechanism (algorithm) to encrypt one meaningful image inside another, or one text inside another. Is it possible? please refer me to some existing works and algorithms.
Thanks in advance. :)
I believe you're looking for steganography. It's a broad topic, but the Wikipedia article will get you started.
Related
How can I specify in the construction of the HistFactory the signal and background to be 2-dimensional distributions?
I have understood than in RooStats you need to change the TH1 to a TH2.
At the moment to write my model in the json file can I use a ndarray to do something similar?.
Which is the correct way to do this?
I hope someone can help me and thank you in advance.
Currently the best way is to unroll the distributions e.g.
{'data': 2darray.ravel().tolist()}
Since mathematically it doesn't make any difference.
If you want to convert from XML+ROOT this is not yet supported (but could be). If so, please open an issue on GitHub.
Thanks for using pyhf!
trying build a text suggestions similar to stackoverflow question suggestions. Do not know where to start from. Any suggestions what tools/servers/algorithms i should be researching. Does this come under text classification?
Any links towards this would be helpful
I think you need to string searching algorithms. They try to find a place where one or several strings (also called patterns) are found within a larger string or text.
The following links help you understand this topic:
Algorithm for autocomplete?
What is the best autocomplete/suggest algorithm,datastructure [C++/C]
https://web.stanford.edu/class/cs97si/10-string-algorithms.pdf
I'm really stuck right now. I want to apply LIBSVM for Image Classification. I captured lots of Training-Images (BITMAP-Format), from which I want to extract features.
The Training-Images contain people who are lying on the floor. The classifier should decide if there is a person lying on the floor or not in the given Image.
I read lots of papers, documentary, guides and tutorials, but in none of them is documented how to get a LIBSVM-Package. The only thing that is described is how to convert a LIBSVM-Package from a CSV-File like this one: CSV-File. On the LIBSVM-Website several Example-Data can be downloaded. The Example-Data is either prepared as CSV-Files or as ready-to-use Training- and Testdata.
If you look at the Values which are in the CSV-File, the first column are the labels (lying person or not) and the other Values are the extracted features, but I still can't reconstruct how those values are achieved.
I don't know if it's that simple that nobody has to mention it, but I just can't get trough it, so if anybody knows how to perform the feature extraction from Images, please help me.
Thank you in advance,
Regards
You need to do feature extraction first. There are many methods that are available. These include LBP,Gabor and many more.. These methods will help you get the features to input into libsvm..Hope this helps...
I have seen these "domain.com/#!/" formated urls, and driven merely by curiosity I chose to ask you people... what is that used for? A kinda "exclamated-hashtag" if you know what I mean.
I see it on sites such as "hypem.com" or "buzzchips.com", both of them delivering asynchronous dynamic content in a similar way.
I uploaded a tiny shot just so you actually see what I see, here and there.
It appears to be a standard for allowing dynamically created content to be crawled.
You can see a good explanation of this under the SEO heading for the following answer:
https://softwareengineering.stackexchange.com/questions/46716/what-should-a-developer-know-before-building-a-public-web-site/46760#46760
Basically need to ask user a set of questions and gather information along the way. Each question could have impacts on different questions down the road. Another example would be turbo tax's web interface, answering yes on some ?s may trigger future questions.
Seems like this would be a fairly common problem in software so I guess I'm asking if there are any existing solutions/Design Patterns out there that could help. Kind of seems like a state machine, but I think that is an oversimplification.
State pattern
Look at this picture which helps with choosing correct fonts which is called So You Need a Typeface (big image there!).
It asks you numerous questions and at some point suggest you one or several answers.
As I understand you want to create something similar but interactive and about another domain.
So, you need to construct similar graph with branching-nodes and leaf-nodes. It can be done very conveniently with the Composite pattern. If you already have (know) all possible questions (or if you know that at some point you will know all of them and will be able to add them manually to the system) then it's the way to go.
If you want something more dynamic and intelligent then the solution can highly vary from case to case.