This collection showcases the step-by-step process followed to create "Calque", 
a web tool designed for manual data extraction from graph images. It works like 
tracing paper, except that the notebook enables the extraction of CSV data. 

Christophe Yamahata

Spline Editor (without bug)

Spline Editor / Splice: Insert control points between existing ones

Closest Point on Line: Solution with multiple control points

Logarithmic and linear scale bars

Draggable axis with arrow

Draggable axes with arrows

Calque (tracing paper)

On-line tool: Calque

Curves and graphs

InGaAs_photodetector_responsivity.PNG

Shure_Beta-52A.PNG

SLED_EXS210154-01.PNG

RGBW_LED_OSRAM_LE-RTDUW-S2WN.PNG

Fletcher-Munson_1933.PNG

Sony_ILX511.PNG

Rubens_Kurlbaum_1901.PNG

Rutherford_ThX_Radium-224.PNG

18NLW4500_Eighteen_Sound.PNG

json2csv.umd.js