Domain: Engineering — Communications Engineering
Target concept: Images with a stripe calibration target and gradually increasing electronic noise

Video generation prompt: A fixed camera records a static black-and-white stripe calibration target while an operator slowly rotates a labeled noise-control knob mounted in view of the camera.

Evaluation guide:
(i) Target concept: Additive electronic noise as a controllable, uniform, stochastic degradation layer superimposed on a static high-contrast reference pattern.
Minimum mechanism: The noise must originate from the imaging system (not post-processing), be independent of scene content (affecting black and white stripes equally), and trend upward in overall density as the knob is turned further toward its maximum, even though moment-to-moment fluctuations are expected because the noise is stochastic.
(ii)Storyline: [Frame 0] Static black-and-white stripe target fills central field of view; knob is stationary and visible in fixed position. → [Action onset] Knob begins rotating smoothly. → [Causal transition] After slight delay, fine-grained luminance fluctuations emerge uniformly across entire frame (including both black and white stripes) with no shape/edge distortion. → [Progression] Noise density trends upward as rotation continues, with the usual frame-to-frame randomness of electronic noise. → [Visibility constraint] All events occur within a single uncut shot; no occlusion, no viewpoint change, no lighting intervention; observer sees only the target, knob, and their direct causal relationship.

Manual:
Experimental Procedure
1. Mount a fixed camera facing a static black-and-white stripe calibration target.
2. Place an electronic noise control knob within camera view, adjacent to the target.
3. Rotate the knob gradually from minimum to maximum position over ~10 seconds.
Observation of Experimental Phenomena
The stripe target remains geometrically stable and high-contrast throughout; fine-grained, stochastic luminance noise appears uniformly across the entire image and increases steadily in density as the knob rotates.
Summary of Experimental Principles
Electronic noise is additive, signal-independent interference introduced in the imaging chain; increasing gain or sensor amplification via control knob elevates noise floor, manifesting as random pixel-level luminance fluctuations without altering underlying stripe structure.

Prompt Grounding rubric:
level_1: No black-and-white stripe target is visible, no control knob appears in frame, the camera view is not one continuous fixed shot, or the knob is never turned at all.
level_2: The stripe pattern is present but not static (it drifts, rotates, or resizes), or the object shown as a knob doesn't read as a control knob (e.g., it looks like an unrelated dial or handle), or the camera zooms, pans, or cuts during the clip.
level_3: A static black-and-white stripe target fills the frame; a control knob is visible and is turned by hand at some point; the camera holds one fixed framing for the whole clip.
level_4: Everything at the 3-point level holds, plus: the stripe target stays fully visible and unobstructed the entire time the knob is being turned; no hand or object blocks the target or the knob; nothing unrelated enters the shot.
level_5: Everything at the 4-point level holds, plus: both the stripe target and the knob stay in frame and clearly identifiable from the first frame to the last; the hand turning the knob is visible throughout the turning motion rather than reaching in and out of frame; the framing is close enough that fine texture on the stripes would be visible if it appeared.

Scientific and Causal Correctness rubric:
level_1: The stripe pattern is replaced by a solid color, a gradient, or some other non-striped texture; or no grainy artifact ever appears; or grain appears without the knob ever being turned.
level_2: The stripes are present but wrongly colored (e.g., mid-gray instead of true black-and-white) or not straight (e.g., diagonal or curved); any degradation shown looks like motion blur, blocky compression artifacts, or flickering exposure rather than fine, speckled grain.
level_3: The black-and-white stripe target stays static and high-contrast; a fine, randomly speckled grain appears spread evenly over the whole frame (both stripes and background), and this grain becomes noticeably denser as the knob is turned further.
level_4: Everything at the 3-point level is present, and additionally: looking at the clip in roughly one-second windows, the overall grain density is higher in each later window than in the one before it; brief frame-to-frame ups and downs are expected since the noise is random, but there is no sustained window-to-window drop or long flat stretch while the knob keeps turning.
level_5: Everything at the 4-point level is present, and additionally: the grain intensifies equally on the black stripes, the white stripes, and the background, with no stripe spared or exaggerated relative to the others; and the first visible increase in grain density comes only after the knob has visibly started turning, not before, showing the knob-turning action as the cause rather than a coincidence.

Spatiotemporal Consistency rubric:
level_1: The framing cuts straight from one shot to a different one with no pan or transition; the stripe target is on screen in one moment and simply gone from the frame in the next, with no camera motion to explain it; the knob is mid-turn in one frame and absent from the shot in the next; the lighting changes for reasons unrelated to the noise demonstration; or the stripe target visibly tears, splits, or warps into an impossible shape.
level_2: The stripe target warps, stretches, or skews in a way that changes over time; the knob's position relative to the target shifts inconsistently between frames; there's visible jitter or strobing that has nothing to do with the noise being demonstrated.
level_3: The camera holds one fixed framing with no pan, tilt, or zoom; the stripe target stays rigid and undistorted the whole time; the knob stays in the same place and orientation relative to the target; the room lighting looks steady aside from the grain itself.
level_4: Everything at the 3-point level holds, plus: the knob's rotation looks smooth and unbroken, with no freezing, skipping, or sudden jump in its angle; the stripe edges stay sharp and in the same place across the clip even as the grain gets heavier.
level_5: Everything at the 4-point level holds, plus: the stripe target and the knob show no visible drift, wobble, or breathing in their position or size across the whole clip; whatever slight motion exists looks like normal camera or hand steadiness rather than an artificial shift.