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Tips on screen grabbing scientific images for an electronic lab notebook

Most of the images you’ll want to attach to an electronic lab notebook like eCAT¬† you’ll already have as an image.¬† Sometimes, however, you’ll want an image of something you can see on your screen, but which isn’t actually an image. A common of example of this is a chart shown in Excel or OpenOffice. It looks like an image, but you can’t export it from Excel as an image. What to do?

There are a variety of things you can do to turn something you see on the screen into an image for upload to an electronic lab notebook like eCAT:

An image on a web page

Right-click on the image (Ctrl-click on Mac), and select “Save image as”.

An image in another application that can export images

Lots of applications that deal with images of one form or another can export them as a standard format such as PNG, JPG or TIFF. Once exported, the image can then be uploaded to eCAT. TIFF is often preferable for scientific images as it can include metadata.

Spreadsheets

Excel does not allow export of charts as images. However, you can add a capability to your copy of Excel which will allow you to export a chart as an image. This is fully described on this web page.

OpenOffice Calc does not allow export of charts as images. However, you can copy the chart and paste it into OpenOffice Draw, which does allow export as an image. Select the chart so it has green handles, copy and paste into Draw, then in Draw while still selected do File | Export.

An arbitrary area of your screen

Sometimes you’d like an image of part of your screen – for example a portion of an image, or a portion of a web page. Different operating systems provide different functionality and applications for this – here are some options:

  • Windows/Vista. Use the PrintScreen button on your keyboard (usually towards the top and right and labelled PrtScr). This will put an image in the Clipboard of what is on your screen. You can then paste this into another program.Or you can use the popular free IrfanView application, downloadable from here . Options | Capture/Screenshot lets you capture the whole screen or a specific window, and then edit it. To select a portion of the image, just click in the window and drag your mouse. Then use Edit | Crop selection to reduce the image to the portion you selected, and finish by saving the image.
  • MacOS. Use the Grab utility, which is located in Applications>Utilities. With the Capture menu, you can choose to capture a specific area of the screen, a specific window, or the whole screen (use Timed Screen). When you save the file, it will be saved as a TIFF image.
  • Linux. Most Linux variants include a screen grab utility, usually under the Applications menu, which will save the screen or a window as an image. To cut out a specific portion of the screen image, the GIMP image editor can be used. Select Tools | Transform Tools | Crop, drag the mouse over the region you want to keep, and press Enter. The image will be cropped and you can save it.

Further ideas on screen grabbing are here .

Once you’ve grabbed your screenshots, you can insert them into a record in eCAT or import them from the dashboard or as a child record.

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