In the lower part of this tab I selected Grab selected is the default action. Disabling the ‘save batch and exit’ and the ‘restart batch’ confirmations has no effect on the download process so I left these unmarked. As for me, I turned Minimize to tray on, because I want GrabIt to minimize to my system tray when downloading. The settings that we can change here are obvious. The first tab, called Interface, allows us to configure settings related to GrabIt’s interface.

But let’s start configuring GrabIt first.Īs you can see, a window called GrabIt – Preferences pops up. These give us access to several GrabIt functions that will be discussed later in the tutorial. First we see a row of buttons that allow us to perform the most common actions.

The GrabIt interface has a very simple layout. Type GRABIT('-sample') to load a sample image.Ĭreated in MATLAB® R13.When we start GrabIt, we see its main screen, which is shown below. 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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