I think everyone will agree with this statement: "A picture is worth a thousand words". It should also be applied to CV too. Searching on the internet, I find many advices tell me to avoid this, most of them are opinions. I don't understand this. The only one article I found which encourage you to adding photo in CV is from Forbes.
An example of a CV with photo:
This is a question that also ask the same thing, and I notice that I have a slightly different question. The main reason to stay away from putting photo into CV is discrimination. However my country doesn't have that law, and in fact I have benefit from this.
Attractive males received a 19.9% callback rate, almost 50% higher than the 13.7% response for plain men and more than twice the 9.2% response to those with no photo.
I am not an attractive one, I have acne. But many of my friends say that I have feature that if I use Photoshop, I will have a nice-looking. So sorry if you feel I'm over confident.
If you have many chances to apply CVs with photos, does adding photo make your CVs have more chance to be accepted?