<p>Lets say i have a portrait photo of which the face it contains covers about 90% of the entire photo. I want to be able to detect the face in this photo using facial recognition but i also want to reduce the file size of this photo. The best way to reduce the file size is to make the size dimensions of the photo smaller.</p>
<p>I want to know at what size a face containing photo becomes unusable for facial recognition. For instance could a 25 x 25 pixels photo still be used for facial recognition or would this be too small?</p>

CC BY-SA 4.0
2022-08-17T00:52:22.437Z
25x25 you can barely understand if a it's a child or an adult... have you tried to read some publications and see what res the used?
Alberto
CC BY-SA 4.0
2022-08-17T01:18:17.957Z
@AlbertoSinigaglia but will it still recognize the face?
Maurice
CC BY-SA 4.0
2022-08-17T01:34:12.473Z
if you mean "recognize if there is a face", yes, if you mean "recognize which face is on that image", no (probably)
Alberto
CC BY-SA 4.0
2022-08-17T02:18:50.300Z
@AlbertoSinigaglia probably isn't going to cut it. I need facts.
Maurice
CC BY-SA 4.0
2022-08-17T16:01:53.213Z
@Maurice You can't really have a definite answer to this question, it will depend on what sort of accuracy you are hoping to obtain.
finlay morrison
CC BY-SA 4.0
2022-08-17T18:29:23.280Z
@finlaymorrison lets say an accuracy of 90%
Maurice
<computer-vision><image-recognition><facial-recognition>
At what size does a picture become unusable for facial recognition?
Maurice
# At what size does a picture become unusable for facial recognition?

(Asked by: username_0 on 2022-08-14)

Lets say i have a portrait photo of which the face it contains covers about 90% of the entire photo. I want to be able to detect the face in this photo using facial recognition but i also want to reduce the file size of this photo. The best way to reduce the file size is to make the size dimensions of the photo smaller.

I want to know at what size a face containing photo becomes unusable for facial recognition. For instance could a 25 x 25 pixels photo still be used for facial recognition or would this be too small?

**Tags:** computer-vision, image-recognition, facial-recognition

> **Comments:**
> **username_1**: 25x25 you can barely understand if a it's a child or an adult... have you tried to read some publications and see what res the used?  
> **username_0**: @username_1Sinigaglia but will it still recognize the face?  
> **username_1**: if you mean "recognize if there is a face", yes, if you mean "recognize which face is on that image", no (probably)  
> **username_0**: @username_1Sinigaglia probably isn't going to cut it. I need facts.  
> **username_2**: @username_0 You can't really have a definite answer to this question, it will depend on what sort of accuracy you are hoping to obtain.  
> **username_0**: @finlaymorrison lets say an accuracy of 90%  

---

## 0 answers

