Description
For nonnegative integer availableFrames and requiredFrames and positive frameRate return slackFrames=available-required and slackSeconds=slackFrames/frameRate.
Vision research uses stimulus angles, chart notations, image scales, viewing distances, coordinate origins, and observation windows. These quantities have different denominators and measurement conventions. A conversion or support share does not independently establish a visual measurement or its clinical interpretation.
For nonnegative integer availableFrames and requiredFrames and positive frameRate return slackFrames=available-required and slackSeconds=slackFrames/frameRate.
When to use this tool
Use Visual Stimulus Frame Slack when you need this image, stimulus, notation, coordinate, or observation component for supplied research data.
How to use the tool and how it works
- Enter availableFrames, requiredFrames, frameRate. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read slackFrames, slackSeconds. Use the output convention below.
For nonnegative integer availableFrames and requiredFrames and positive frameRate return slackFrames=available-required and slackSeconds=slackFrames/frameRate.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| availableFrames | Available Frames | Required. Safe integer; minimum 0. |
| requiredFrames | Required Frames | Required. Safe integer; minimum 0. |
| frameRate | Frame Rate | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| slackFrames | Slack Frames | Required. Safe integer. |
| slackSeconds | Slack Seconds | Required. Finite number. |
{
"input": {
"availableFrames": 12,
"requiredFrames": 10,
"frameRate": 2
},
"output": {
"slackFrames": 2,
"slackSeconds": 1
}
}Limitations and assumptions
- FrameRate is frames per second and negative slack is a valid deficit. No dropped-frame detection, device synchronization, stimulus-timing calibration, or clinical test validity is established.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use calibrated acquisition and a documented visual or imaging protocol for complete interpretation. Confirm the reporting notation, viewing geometry, image scale, and support of the underlying observations.
References
Similar or alternative tools
- Visual Angle Stimulus Size
Return the exact centered planar stimulus angular width from supplied compatible dimensions, without an acuity score.
- Visual Field Solid Angle Small Angle Term
Solid angle of an ideal centered rectangular angular patch versus its small-angle product, without a visual-field test interpretation.