Usually a RGB image is difficult for area calculation. Usually all the letters and 1-5 are taken. Check in Plugins>Utilities>List shortcuts to see what keys are still available. You can set a shortcut for Measure and Label in Plugins>Shortcuts>Creat a Shortcut. If you have lots of items on the image and want to mark after measuring, go to Pugins>Analyze>Measure and Label. Select Straight line tool in the tool bar and draw the line on the object you want to measure. You can choose “Open in Process” so that everytime after you acquire an image, it turns to Process directly. There is an option for the actions after saving the image. But if you want to save onto every image, then go to Preference on the top of Leica Application Suit software. You can use one image merged with scale bar for all the pictures in ImageJ, choosing “Global” when setting the scale bar. And press “Merge” and “OK”, you will get the image with the scale bar. In Fonts, you can select colour and size for the bar. Change the length and endings if you want. One needs to go to “process” part to merge a scale bar into the saved image. If you are using “Default” in the calculation part, it should be just fine. When acquiring the image, the right lens magnification should be set and right scale bar needs to be calculated. I am using Leica Application Suit as the software for Leica DM2500. Tick “Global” if the scale bar is applied on all the images you are analyzing.įor the microsope pictures, a scale bar can also be set into the image. In the dialog, Known Distance is the real length of the scale bar and Unit of Length the real unit. Enlarge your image to do it if you want more acurate result.ģ. Select straight line tool on tool bar in ImageJ. Then it will be the scale bar for your image.Ģ. a line or a cube, whose unit is clear, should be photographed with your object together. It should be set in the beginning so no matter what treatments you do on the image, it won’t affect the the scale in the calculation.ġ. ( )įor all kinds of calculation, you always need scale bar for ImageJ to convert the actual pixels on the picture into the unit you need. You always can check if there are more suitable plugins for your own purpose. The plugins I am talking about here should be already installed once the whole software is settled down. Here I write it down step by step and hope it would help. Check it out here.Īfter learnt from Pedro, I have been using ImageJ to calculate leaf area and stomatal size. UPDATE! This small guide now is edited and published in UV4Plant Bulletin.
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