Infrared Spectrum Curve Extraction

Quick Tips：
• Preferably use a clear, non-distorted spectral image (≥800 px wide) without grid lines or peak labels.
• After processing, preview the extracted curve, verify major peaks with the mouse, then download the CSV file.
• Three extraction methods are available: automatic, color-based, and manual point-by-point tracing.
• After successful extraction, upload a CSV for searching; otherwise, upload an image directly, which may take several hours to process.

Upload Spectrum Image

Crop & Set Parameters

Step 2 Tips
1) Adjust the crop box so its top touches the curve’s peak and bottom touches the curve’s trough.
2) Align left/right edges with spectral start/end points or axis ticks, then enter the wavenumbers accurately.
3) Drag the yellow vertical dashed line to align with the 2000 wavenumber tick on the axis.

Background Removal

Step 3 Tips
• Drag multiple boxes on representative background areas (exclude the spectral curve, include grid lines if present).
• Set threshold: lower is strict, higher removes more similar shades.
• Choose output mode (Original or Grayscale) here, then click Apply and Continue.

Extract Curve

Step 4 Tips
• Auto: The system will first attempt automatic detection. Observe the green curve in the bottom-right corner; use the other two methods if unsuitable.
• Color Pick: Applicable when the spectral curve shows distinct colors. Click and select 3 to 8 representative color points on the spectral curve.
• Manual Trace: Click to mark points along the curve; more points yield higher accuracy.

Auto Detection Result

System automatically tried to detect curves using grayscale analysis. Check the result below.