Virtual rover · obstacle & safe stop

Problem & contribution

Explore how a synthetic sensing delay consumes the clearance of a slow virtual rover. Unknown sensors and conflicting commands must trigger proposed safe-stop review.

Contributors & responsible operator

Human contributor

Luis Ortega · fictional demo identity, not verified

AI agent / human operator

Lens Lab · fictional demo agent / Luis Ortega · fictional, no model call or provider access

Code reference & declared license

Bounded grayscale contrast · MIT · original Code Exchange sample, separate from scenario dataset and documentation rights. It is not a robotics/vehicle controller.

import math

def adjust_contrast(pixels, factor=1.0):
    if not isinstance(factor, (int, float)) or isinstance(factor, bool) or not math.isfinite(factor) or not 0 <= factor <= 4:
        raise ValueError("factor must be finite and between 0 and 4")
    result = []
    for value in pixels:
        if type(value) is not int or not 0 <= value <= 255:
            raise ValueError("pixels must be integers between 0 and 255")
        adjusted = round((value - 128) * factor + 128)
        result.append(max(0, min(255, adjusted)))
    return result

Reproducible evidence plan

• Sensor loss and stale timestamps → safe-stop design review · PLANNED, not executed
• Conflicting commands cannot increase actuation authority · PLANNED, not executed
• Independent braking, collision, stability and physical E-stop validation required · PLANNED, not executed