Timeline for How can I increase image size by zero padding?
Current License: CC BY-SA 3.0
3 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 26, 2015 at 6:59 | comment | added | Olli Niemitalo | DFT is a periodic transform: the input is periodic and the array contains one period. The edges you think won't be padded will be padded by zeros on the opposite side of the 32x32 image. Translation in the spatial domain equals a phase shift in the frequency domain, which won't affect the magnitudes of the frequency bins. So you don't need to translate the 8x8 image in any particular way if you are only going to look at the bin magnitudes. | |
| Sep 25, 2015 at 17:56 | comment | added | Psi Lambda Delta | I think this way the whole image information will be concentrated at one corner of the image, mainly the corner referring to (0,0) for the image and two edges of the image will be highly zero-padded and two will remain the same. If the original image is at the image centre then it may be surely helpful. | |
| Sep 25, 2015 at 6:25 | history | answered | Olli Niemitalo | CC BY-SA 3.0 |