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DISPLAY TEST/ONLINE
DÉRIVE DE TRAJECTOIRE — ANALYSE D'ERREUR RMS

Test de Précision Vectorielle et Gigue de Lignes

Tracez des lignes droites entre des repères pour évaluer le bruit de ligne du numériseur, mesurer l'ondulation diagonale du stylet et calculer l'écart spatial RMS.

工程指标明细

评估触控轨迹相对于理想直线矢量的 RMS 抖动偏差与电磁噪声。

RMS Jitter Deviation0.0 px
Max Peak Deviation0.0 px
Precision Score等待按键按下...
MATHÉMATIQUES DU BRUIT DE NUMÉRISEUR

Dérive Vectorielle RMS et Ondulation Diagonale du Stylet

Les stylets actifs (Wacom EMR, Apple Pencil, Microsoft Pen Protocol) peuvent présenter une gigue diagonale liée à la quantification entre canaux de la grille ITO. La précision se mesure via la distance perpendiculaire (di) des points par rapport au vecteur idéal :

FORMULE D'ERREUR RMS
RMS_Error = √( (1/N) × ∑(d_i)² )
Des valeurs RMS basses (inférieures à 1,5 pixel) attestent d'une précision de niveau professionnel.

OPTOMETRIC ERGONOMICS & NON-MEDICAL NOTICE

Display Test Online is an engineering calibration utility for electronic visual displays (LCD, OLED, QD-OLED, MicroLED) and mobile touch digitizers. This software is NOT a medical eye exam, optometric vision test, or diagnostic health utility.

To reduce Digital Eye Strain (DES) during display calibration, apply optometric ergonomics:

  • The 20-20-20 Rule: Every 20 minutes, look at an object at least 20 feet away for 20 seconds.
  • Ambient Illumination: Ensure room ambient lighting matches display brightness levels (~100–150 nits for standard SDR workloads).
  • Optimal Viewing Distance: Place your screen approximately 20 to 30 inches (50–75 cm) from your eyes.
Technical FAQs & Helpful Content

常见问题解答 (FAQ)

关于此项诊断工具、校准步骤及显示器技术标准所需了解的一切。

01.What is the Vector Precision & Line Jitter Test?
This test measures spatial trajectory accuracy and line jitter by calculating the Root Mean Square (RMS) perpendicular deviation between your drawn path and ideal linear vector anchors.
02.What is active stylus diagonal waviness?
Diagonal waviness occurs when drawing slow diagonal lines with an active pen (e.g. Apple Pencil, Surface Pen). Spatial quantization across ITO matrix channels creates small staircase ripples.
03.How is Root Mean Square (RMS) error calculated?
RMS Error is calculated as the square root of the average squared perpendicular distance (in pixels) of all sampled touch points relative to the reference vector path.
04.What is an acceptable RMS error score for drawing and handwriting?
Professional art and note-taking tablets aim for an RMS error below 1.5 pixels. RMS values above 3.5 pixels indicate noticeable line jitter or digitizer noise.
05.Why does my drawn line wobble even when drawing with a ruler?
Line wobble is caused by high-frequency electromagnetic noise from screen backlights, ungrounded power supplies, or low-resolution capacitive digitizer polling.
06.Does drawing speed affect vector precision?
Yes, drawing slowly exposes high-frequency digitizer sampling jitter, whereas fast strokes benefit from internal stroke smoothing and line interpolation.
07.Can screen protectors increase stylus line jitter?
Certain matte or thick glass protectors increase physical tip distance from the ITO sensing layer, slightly increasing spatial position error.
08.What is the difference between active EMR pens and passive capacitive styluses?
Active EMR/USI styluses use dedicated digitizer ICs to transmit sub-millimeter position and pressure data, while passive capacitive tips simulate a wide finger tap with lower spatial accuracy.
09.How can I reduce line jitter on my touchscreen?
Unplug third-party chargers, disable aggressive palm rejection overlays, and ensure the screen surface is clean and dry.
10.How do I reset vector precision anchor points?
Press the 'R' key or click the 'Reset Line' button to clear existing drawing paths and start a fresh precision trial.
不确定接下来该运行哪项测试？需要故障排除建议？
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EXCELLENTE PRÉCISION

Évaluation du Bruit de Ligne RMS

96/100
Erreur RMS0.82 px
Dérive Max1.4 px

Mesures Vectorielles

Télémétrie de Trajectoire

Bruit RMS
Erreur RMS
0.82px
Target: < 1.5 px
0%15%100%
Dérive Maximale de Ligne
1.4px

Configuration du Test

Paramètres d'Ancrage

Controls
3 px

Inspection du Bruit ITO

Bruit de Canaux du Numériseur

Hardware HID
Résolution Spatiale0.1 mm
Plancher de Bruit0.12 px
Fréquence d'Échantillonnage240 Hz

Shortcuts

Keyboard Navigation

Hotkeys
F
Basculer Plein Écran
R
Réinitialiser Toile
TV users can navigate with D-Pad & Remote arrow keys
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