Marker colors, shape and size can be customized in the preferences setting. The line choice makes connecting lines between markers. Marker drawing is also selectable from // menu. If the checkbox is checked, you can get a sorted series regardless of order of reading points. There is no limit of numbers of rows in a series. You don't need to choose a series in turn, but empty series is ignored when copying or saving in text format. You can choose a data series by a menu at left-bottom side of the window. The corresponding data coordinates are shown in the area on the right-bottom corner.Ĭlick on a plot point makes a digitized data and the data is appended to the data table (the table is omitted in the above figure). The bottom area changes as shown below and red cursor marker is shown on the image instead of the green axis lines (cursor marker only appears when mouse cursor is in the image area). When you finish setting up axis positions, choose tab at the bottom of the window. Press command-2 again to unlock the value. command+2 Locks the Y/ R value at the current cursor position. Press command-1 again to unlock the value. You can change the locked value in the editing field at the bottom-right of the window. When it is locked, only the other axis guide line moves freely. command+1 Locks the X/θ value at the current cursor position. However, the minimum zooming value is limited to 1/8. command+option+shift + drag The mouse cursor changes to a minus-loupe shape, the current view area is zoomed out to fit in the selected area. command+option+shift + click The mouse cursor changes to a minus-loupe shape, the image is zoomed out one step at the clicked point. However, the maximum zooming value is limited to 2. command+option + drag The mouse cursor changes to a plus-loupe shape, the selected area is zoomed to fit the current view area. command+option + click The mouse cursor changes to a plus-loupe shape, the image is zoomed in one step at the clicked point. Type GRABIT('-sample') to load a sample image.Ĭreated in MATLAB® R13.In this section, useful and effective keyboard shortcuts for plot digitalization is explained.Ĭommand + drag The mouse cursor changes to a open-hand shape, you can scroll the image as you grab it. GRABIT(FILENAME) will start the GUI program and open the image file FILENAME. Basically, any format supported by the IMREAD is accepted. The types of files that will most likely work are BMP, JPG, TIF, GIF (up to 8-bit), and PNG files. ![]() The calibration stage ensures that the imperfect orientation or quality of the image is accounted for. This code will also work for extracting data points from a tilted or a skewed image (even upside-down or mirrored). In addition to using the zoom button, there are keyboard shortcuts for zooming: Panning is achieved by clicking and dragging on the image. Variables can be renamed, saved to file, or edited in Array Editor. Multiple data sets will remain in memory so long as the GUI is open. You will be prompted to select 4 points on the image.ģ. It can also be renamed and saved as a MAT file.Ģ. Multiple data sets can be extracted from a single image file, and the data is saved as an n-by-2 matrix variable in the workspace. It is capable of reading in BMP, JPG, TIF, GIF, and PNG files (anything that is readable by IMREAD). GRABIT starts a GUI program for extracting data from an image file. GRABIT Extracts data points from an image file.
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