Timeline for What steps come after finding the gradients of the SIFT key points?
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 18, 2014 at 6:37 | comment | added | old-ufo | It adds magnitude. | |
| Feb 17, 2014 at 18:54 | comment | added | logamadi | @old-ufo Thanks.Suppose there are 8-bin orientation histogram,then does it add how many pixels(surrounding key-points) fall into each bin or does it add the magnitude of each gradient that falls into each bin and finally normalize it? | |
| Feb 17, 2014 at 18:53 | vote | accept | logamadi | ||
| Feb 17, 2014 at 4:46 | comment | added | old-ufo | No, first it adds all gradient vectors in the patch, get the direction, then rotate patch and then calculates description. | |
| Feb 17, 2014 at 4:05 | comment | added | logamadi | I don't understand the final part of the paragraph.How does it find the dominant gradient direction in the patch,is it by adding all the same direction gradient vectors in the cells (4X4) and finding the highest magnitude or by some other means?Also how to rotate the first orientation bin to that direction. | |
| Feb 16, 2014 at 16:13 | history | answered | Dima | CC BY-SA 3.0 |