How to deal with bad face detection?

Mon Jun 19 14:09:02 BST 2023

Hi,

What is the best way to deal with bad face detection?

These situations happens fairly frequently, and I would like to know 
what is the recommended action in each of them:

*A: Non-face detected as face*

In this situation, DK detects something that is not a face at all as 
being a face. I think what happens is that if you feed the algorithm 
noise, it will sometimes find patterns in that noice. These images are 
effectively "noise" that just get a high enough score it be detected as 
a face.

Examples "faces" detected this way:

Possible actions:

Which of these are the right approach?

1: Click red cross to say "This is not a face" seems like the obvious 
approach. However, I /think/ what happens then is that next time I click 
DETECT FACES, these misdetections will show up again. At least this is 
what I fear. But I hope someone can confirm.

2: Click the minus button to "Ignore this face". I /think/ this would 
cause DK to remember this mismatch and not include it another time. 
However, I am unsure if ending up with a huge "ignored" faces tag would 
make DK slow at some point?

3: Something else I have not thought of?

*B: Drawings and paintings of faces are detected as faces*

While these are technically "faces" they are not faces of persons. Maybe 
this cannot be avoided?

Examples "faces" detected this way:

Possible actions:

Which of these are the right approach?

1: Click red cross to say "This is not a face". Since this is not a 
person, I think this might be the right approach, but I do /not/ want DK 
to show me this as a face again.

2: Click the minus button to "Ignore this face".//Maybe this is a better 
approach. If I have several similar paintings or drawings, would DK then 
figure out to ignore all of them if I mark one of them as ignore? //

3: Something else I have not thought of?

*C: Poor quality images of actual faces*

So in this situation, DK is rightly detecting something is a face. 
However, the images are extremely poor quality. Sometimes I may even be 
able to see who the actual person is. However, accepting such poor 
quality matches might cause DK to make a lot of spurious hits afterwards 
because some blurry blob contains very little actual information and it 
might match a lot of stuff that does not make any sense. At least I 
/think/ this is what happens from observed behavior. But I do not have 
insights into the actual underlying matching algorithm.

Examples "faces" detected this way:

Possible actions:

Which of these are the right approach?

1: Click red cross to say "This is not a face". I would tend to do this 
as I do not want DK to treat this as a face. However, it IS indeed a 
face. And I am not sure if I am going to mess with the matching 
algorithm if I say this is not a face. Also, I do NOT want to see these 
suggestions again , and I am not sure if this option would cause DK to 
suggest it again next time.

2: Click the minus button to "Ignore this face".//Maybe this is a better 
approach. Problem is that if DK has detected a poor blurry image as 
being person X, then clicking IGNORE might cause DK to ignore other good 
quality images of person X?

3: Something else I have not thought of?

*D: Statues, figurines, animals (typically dogs), etc. resembling faces*

This situation is very similar to the one with the drawings and paintings.

Here, it is technically a face that DK detected. However, it is not a 
person.

Examples "faces" detected this way:

Possible actions:

Which of these are the right approach?

1: Click red cross to say "This is not a face". Since this is not a 
person, I think this might be the right approach, but I do /not/ want DK 
to show me this as a face again.

2: Click the minus button to "Ignore this face".//Maybe this is a better 
approach.

3: Something else I have not thought of?

-- 
Mvh
Thomas
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