Age & gender models

[vladmandic]

Discussed in #338

^{Originally posted by nicoeiris11 February 15, 2023}
Hi Vlad!

I'm testing alternative age and gender models instead of using the default description config with faceres.json model.

While reading the wiki I found that ssrnet supports age.json, gender.json and gender-ssrnet-imdb.json.
When testing the last one using the demo I found an error regarding model input shape:

exception: The shape of dict['input_4'] provided in model.execute(dict) must be [-1,64,64,3], but was [1,64,64,1]

Am I missing something or is it actually an error in the pre-processing of the frame?

This is my current config:

ssrnet: {
      enabled: true,
      modelPathAge: 'age.json',
      modelPathGender: 'gender-ssrnet-imdb.json',
      skipFrames: 99,
      skipTime: 3000,
      minConfidence: 0.1,
    },
```</div>

[vladmandic]

gender.json is rgb model and gender-ssrnet-imdb.json is grayscale model while both share same execution code.
added auto-detect which one is used in input processing and expanded automated test coverage.

new code is published on github.