| 摘要 |
A device according to embodiments comprises an acquisition unit, a calculation unit, a selection unit, a generation unit, a projection unit, a denoising unit and a reconstruction unit. The acquisition unit may acquire a plurality of basis pattern for converting a first region and a second region in a target image. The calculation unit may calculate a contribution ratio of each basis pattern. The selection unit may select one or more basis patterns from higher contribution ratio to lower contribution ratio until a sum of selected contribution ratios reaches a specific first threshold. The generation unit may generate a control signal increasing with the number of the basis pattern selected by the selection unit. The projection unit may project a third region in the target image to the basis patterns to obtain a projection coefficient. The denoising unit may reduce noise of the projection coefficient in accordance with an intensity of the control signal so that the higher the intensity of the control signal is, the stronger the denoising becomes. The reconstruction unit may reconstruct the third region using the denoised projection coefficient. |
