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• Introduction of fake blur• Process Overview• Depth-of-Field (DOF) Specification• Results• Discussion
Introduction of Fake Miniature
Slide credit: Rebert Held
• Optical blur
Normal Lens
Slide credit: Rebert Held
Tilt-Shift Lens
Slide credit: Rebert Held
Process Overview
• Goal: Simulate the Tilt-Shift Effect (i.e., miniature photography)
• Process– Focus line/region/target selection– DOF specification– Blur image– Color Enhancement (optional)
Depth-of-Field (DOF) Specification
• We lost depth information from the image.
• Assumption: objects on the same straight line are at the same depth.
• Methods to specify DOF– Horizontal– Focus line– Object mask– Salient region detection
DOF - Horizontal
DOF - Focus Line
DOF – Object Mask
DOF – Salient Region Detection
More Results
Discussion
• Two main open issues– Depth estimation from single image– Salient region selection
• Accurate depth information can help create realistic miniature effect
• Salient region selection can help automate the miniature photography process
References
• [1] Held et al. "Using Blur to Affect Perceived Distance and Size". ACM Transactions on Graphics 2010.
• [2] Levin et al. "Image and Depth from a Conventional Camera with a Coded Aperture". SIGGRAPH 2007.
• [3] Felzenszwalb and Huttenlocher. "Efficient Graph-Based Image Segmentation". IJCV 2004.
• [4] Achant et al. " Frequency-tuned Salient Region Detection ". CVPR 2009.
Thank You!Questions?