[talks] Ohad Fried will present his FPO on Wednesday, May 17, 2017 at 1:30pm in CS 401.

Nicki Gotsis ngotsis at CS.Princeton.EDU
Wed May 10 13:11:46 EDT 2017

Ohad Fried will present his FPO on Wednesday, May 17, 2017 at 1:30pm in CS 401. 

The members of his committee are: Adam Finkelstein (adviser); readers: Tom Funkhouser and Eli Shechtman (Adobe); examiners: Szymon Rusinkiewicz and David Dobkin. 

A copy of his thesis is available in Room 310. 

Everyone is invited to attend his talk. The talk title and abstract follow below: 

The typical smartphone user has many thousands of photos in their personal collection. 
Photo acquisition is effortless, and the next challenge is in devising methods to easily edit 
such large collections. Specifically, we need manipulation algorithms that are powerful 
enough for experts, yet simple for novices to master. 
We identified three key directions to empower novice users with expert-level editing 
capabilities while maintaining an overall simplicity in the process. Those directions are 
(1) better selection masks, (2) high-level goal-centric algorithms and (3) domain specific 
algorithms. In this thesis we give examples from each category. 
Given a photo, a novice user will typically either not edit it at all, or apply a simple 
global operation such as exposure correction. In contrast, a professional photo editor 
might perform local edits, specifying a selection mask to limit the operation to specific 
photo regions, or combining regions from several photos into a single composition. To 
ease selection mask creation we present a new patch embedding technique that allows for 
single-click selection masks. 
Novices often think in terms of goals (e.g. improve lighting, de-clutter photo) and less 
in technical terms such as color spaces and image layers. One example of a high-level 
goal is the removal of distracting elements from photos. The task is motivated by the 
way professional photographers operate. They carefully frame the scene and might move 
objects around in order to stage the perfect photo. We define “photo distractors” as the 
elements that, if removed, would improve the photo. Using a simple slider interaction we 
allow users to automatically remove such distractors from photos. 
It is at times useful to tailor solutions to specific photo types. As an example we show 
that, specifically for human heads, simple controls can induce sophisticated edits. Given a 
single portrait photo as input, we can change the pose of the head and the camera distance. 
This allows users to correct the “selfie effect”, i.e. big noses and small ears or to transform 
distant photos into selfies. 
We conclude by discussing how each of these directions can be further explored to 
enable better image editing tools for novices. 
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