OpenSketch: A Richly-Annotated Dataset of Product Design Sketches

Sketches in a JSON file format

Sketch encoding has the following structure:

    { "canvas": {
        "height": number of pixels,
        "width": number of pixels,
        "pen_width": number of pixels
      },
      "strokes": [
        { "is_removed": false/true,
          "points": [
                {"p": pressure, "t": time, "x": horizontal position, "y": vertical position},
                ...
                {"p": pressure, "t": time, "x": horizontal position, "y": vertical position}
          ]
        },
        ...
        { "is_removed": false/true,
          "points": [
                {"p": pressure, "t": time, "x": horizontal position, "y": vertical position},
                ...
                {"p": pressure, "t": time, "x": horizontal position, "y": vertical position}
          ]
        }  
      ] 
    }
    

Width of a stroke segment is computed as a pen width 'pen_width' multiplied by a pressure value 'p' of the last point in the strokes segment. Opacity is set to a value of 'p'.

Download:

• sketches_json_first_viewpoint.zip

  Contains for each designer or design student sketched object:

              view1_concept.json:         a json file with a conept sketch
              view1_concept.png:          a png file with a conept sketch and transparent background   
              view1_concept_opaque.png:   a png file with a conept sketch and white background   
              
              view1_presentation.json:         a json file with a presentation sketch
              view1_presentation.png:          a png file with a presentation sketch and transparent background   
              view1_presentation_opaque.png:   a png file with a presentation sketch and white background   
              

• sketches_json_second_viewpoint.zip

  Contains for each designer or design student sketched object:

              view2_concept.json:         a json file with a conept sketch
              view2_concept.png:          a png file with a conept sketch and transparent background   
              view2_concept_opaque.png:   a png file with a conept sketch and white background   
              
              view2_presentation.json:         a json file with a presentation sketch
              view2_presentation.png:          a png file with a presentation sketch and transparent background   
              view2_presentation_opaque.png:   a png file with a presentation sketch and white background   
              

Sketches in a SVG file format

The average pressure value is computed for each strokes: , where N is the number of points in the stroke, and p is a recordered pressure.

Download:

• sketches_svgs.zip

  Contains sketches in a svg format:

              designer_objectName_view_drawingType.svg                
                  

Sketching task code and executables

Download:

• Code repo

  Contains code for the sketching interface.

• sketching_tasks_windows.zip

  Contains for each object an executable for windows for the used sketching task.

• sketching_tasks_mac.zip

  Contains for each object an executable for mac for the used sketching task.

• objects_animations.zip

  Contains video animations of camera rotation around objects. These animations were shown to participants.

• objects_orth_views.zip

  Contains renderings of the orthographics views of the objects used in the sketching task.

Example instructions and sketching interface screenshots