How does the search engine look at the compressed image and with the addition of an image to it?

Question

Search Engine Optimization

Tell me how the search engine looks at the pinched image?
The bottom line is this - there is a picture of 2000x1500 on some source, for example, I download it to myself, squeeze it into 1000x750, for example, and place it on my website, on the one hand this is a different picture, on the other hand, the search engine can compare it (I guess).
Also, if this picture is compressed and another picture is "sewn" into it (for example, the logo of my site), given that this picture was clean, that is, without the logo of another site.
Tell me, is there a difference in the pinched and with the logo, or is the search engine eating and will be treated badly?

Answer 1

Such tricks do not uniqueize pictures properly. The best working method to fully uniqueize an image, paradoxically, is "mirror reflection". The main thing is that this is not done before you :)

Answer 2

I doubt that the Yandex image compressed and / or with the addition of watermark will be considered original. Yandex quite successfully finds similar images, you can check using a search in Yandex. Pictures, incl. "Find similar" and "Other sizes" functions