The controls adjust the colors and number of spokes displayed in the chart. Execute the second cell below to create the desired chart interactively.Do this by clicking in the cell to highlight it, then entering 'shift-return' from the keyboard, or clicking on the run button in the toolbar menu (looks like >|), or the 'Cell>Run Cells' menu item. First run the code in the following cell.To use the notebook after it has been loaded in an executable environment: There may be a longish pause as the notebook loads. An executable version of this notebook is available from the by clicking on the following button. This is a Jupyter notebook containing Python functions. The idea for this notebook was motivated by this post on a forum at Digital Photography Review (DPReview). This notebook produces a Siemens Star test chart in the form in [Scalable Vector Graphics (svg)[( ) that can be rendered by most modern web browsers. Also known as Siemens star or sunburst pattern. The Siemens Star is a radial starburst pattern commonly used to adjust internal focus settings in camera lens and for measuring camera resolution. The optical resolution charts are used to test characteristics such as resolution, contrast, distortion.
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