Round 2: single frames from the eye-tracking videos, now with the improved homography and the corrected movie timing. Each one has the computer's guess of where the movie screen is (blue outline).
First say whether it's correct. If it's right, that's one click. If not, fix it (drag the corners, click 4 corners, or match landmarks between the camera picture and the movie).
Many frames this round come from the hardest trials. Some have no outline at all, or screen corners you can't see: for those, place the screen by matching landmarks. Your fixes go straight back into the pipeline for those trials.
Sign in with the same name you used for batch 2: that brings up your 150 frames for this week. The first 20 are shared by the whole team (a few are back from round 1), so take extra care to line those up exactly. Most frames take under a minute. Your answers save as you go, so do it in as many short sittings as you like; you pick up where you left off.
Outline check, round 2
Movie frame: after clicking a spot in the camera picture, click the same spot here
View
Blue = the computer's outline. Check it against the screen in the picture and the movie frame on the right.
What the movie showed at this moment
Does the blue outline sit on the screen's edges?
Next you pick how to fix it: drag the corners (a little off), click 4 new corners (way off), or match landmarks (the screen's corners are hidden).
1. How far off is each corner of the blue outline?
✓ Fine: on the screen's corner (within about a line's width)
1 Slightly off: close, under ~2% of the screen's width
2 Noticeably off: about 2–5% of the screen's width
3 Clearly off: about 5–15% of the screen's width
4 Badly off: more than ~15% of the screen's width
5 Completely wrong: nowhere near; on another object, another corner, or far off the screen
A corner outside the picture: judge it from the screen's edges running toward it.
2. Fix the outline: pick a tool
Drag the four corners onto the screen's real corners. Corners may sit outside the picture; drag them into the dark margin if needed. The magnifier helps while dragging.
For when the blue outline is way off. Click the screen's four corners in the picture, in any order (a corner off the picture can go in the dark margin). Then drag any dot to fine-tune it. Backspace undoes the last dot.
Best when the screen's corners are hidden or off the picture. Click something you can recognise in the camera picture, then the same thing in the movie frame under it. Do at least 6 points, spread over the whole movie frame (near its edges is best; use still things like signs, windows and road markings, not people or cars). The magnifier shows where you are clicking. Orange dots around each corner show how unsure the outline still is; add points until they are tight. Clicks near the movie frame's corners snap onto them. Drag a dot to adjust it; Backspace undoes the last point.