000203565 001__ 203565
000203565 005__ 20190317000045.0
000203565 037__ $$aCONF
000203565 245__ $$aA Practical Method for Measuring the Spatial Frequency Response of Light Field Cameras
000203565 269__ $$a2014
000203565 260__ $$bIEEE$$c2014
000203565 336__ $$aConference Papers
000203565 520__ $$aThe spatial frequency response (SFR) is one of the most important and unbiased image quality measures of a digital camera. It evaluates to which extent a lens/sensor combination can resolve scene details. In this paper, we propose a simple and practical method to measure the SFR of microlens-based light field cameras. The particularity of such cameras resides in their ability to capture both spatial and angular information of the incoming light field thanks to an array of microlenses located in front of the sensor. Existing methods for measuring the SFR of conventional cameras are thus no longer applicable as the interaction between the main lens and the micro-lenses results in different resolving powers over the image plane that depend on the scene depths. By using a 3-dimensional target made of vertical lines printed on an inclined planar surface, we are able to measure the SFR across multiple depths in a single exposure. Our method allows SFR measurements from the raw light field itself as captured by the camera, and is thus independent of subsequent post-processing algorithms such as image reconstruction, digital refocusing or depth estimation. Our experimental results are consistent with theoretical bounds and reproducible.
000203565 6531_ $$alight field
000203565 6531_ $$aSFR
000203565 6531_ $$aspatial frequency response
000203565 6531_ $$aMTF
000203565 6531_ $$amodulation transfer function
000203565 6531_ $$acomputational photography
000203565 700__ $$0248795$$aFirmenich, Damien$$g178474
000203565 700__ $$0241946$$aSüsstrunk, Sabine$$g125681
000203565 700__ $$0246434$$aBaboulaz, Loïc$$g114557
000203565 7112_ $$aIEEE International Conference on Image Processing$$cParis, France$$dOctober 27-30, 2014
000203565 773__ $$q5776 - 5780$$tProceedings of the IEEE International Conference on Image Processing
000203565 8564_ $$s320307$$uhttps://infoscience.epfl.ch/record/203565/files/icip_paper_v2.pdf$$yPublisher's version$$zPublisher's version
000203565 909C0 $$0252056$$pLCAV$$xU10434
000203565 909C0 $$0252320$$pIVRL$$xU10429
000203565 909CO $$ooai:infoscience.tind.io:203565$$pconf$$pIC$$qGLOBAL_SET
000203565 917Z8 $$x178474
000203565 917Z8 $$x178474
000203565 917Z8 $$x190838
000203565 937__ $$aEPFL-CONF-203565
000203565 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000203565 980__ $$aCONF