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[Deleted User]

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sgenzer

hello @mbs - there is no answer to this question without more specific information. What exactly are you trying to do?

Scott

[Deleted User]

Hello
@sgenzer
I have a situation like google and I want to make a software which has the same process like google and some how a bit more complex than google so in this situation what is your suggestion for an algorithm?

Thank you 
mbs

sgenzer

sorry @mbs but that is still very vague!

[Deleted User]

@sgenzer

Thank you that you follow the problem and for your help.

I have a computer vision process after that I have to use machine learning on the result of that so the process is like google because it has a big database so what is the best algorithm for machine learning part?

Many thanks

mbs

rfuentealba

Hello @mbs,

If you have a large dataset for computer vision, there is only a handful of algorithms that you can apply. The most common are:

• Neural Network.
• Deep Learning.
• Convolutional Neural Network.
• HAAR Cascades.
  

Besides that, you should define what kind of computer vision algorithms do you require: do you need edge detection? do you need depth management? do you need to transpose images so that you can "paste those" depending on the content?

Before doing computer vision, you will need to apply some transformations depending on the depth captured by the camera or certain shapes. Are you considering those too? These processes might be expensive if not done by GPU.

You choose your algorithms depending on what images are you using, and how you are using these. You may as well want to use channels (RGB) and check how similar are the images before deciding which ones to use.

[Deleted User]

Hello

What do you mean by using " channels(RGB)"? plz explain more.

Yes I need edge detection and need depth management too.  Is ensemble learning good for that? 

I have to work on sequence of images.

So which algorithm is better for that?

Thanks

mbs

rfuentealba

Each picture can be decomposed in red, green and blue "channels" (primary colors for painting with light, as opposed to red, yellow and blue that are primary colors for working with pigments).

A Convolutional Neural Network is an ensemble of neural networks that acts on each channel independently. It works for object recognition, edge detection and many other things. I would advise you to use an edge detection algorithm such as Sobel, Laplacian, Prewitt or... I always forget the other one, as an input.

For depth detection, I would advice you to search for Andrew Ng's depth detection algorithms. You will face many issues, such as the color correction (the blue and black dress that some people mistook as white and gold), but it all depends on what kinds of images are you using.

All the best,

Rod.

[Deleted User]

ensemble means combining algorithms in order to make it more strong.

For example:deep learning+nural network

The color should be all in gry

mbs

varunm1

I recommend you try 3D CNN if the images are sequential. The 3 Dimensional CNN also helps capture temporal properties (a bit) with spatial properties. You can also create fusion networks which are a combination of CNN and RNN that capture both spatial and temporal properties from data. Here is one good article related to this. 

https://blog.coast.ai/five-video-classification-methods-implemented-in-keras-and-tensorflow-99cad29cc0b5

rfuentealba

Hi @mbs,

Yes, that is the definition of an ensemble method. To determine which ones will get you better performance, though, you should use non-ensembles first and then combine and test. There is a series of recommendations, such as not combining stable learners because these won't help you get a better prediction and a long list of things.

All the best,

Rod.

[Deleted User]

Thank you