Retrieving blue color data
Collect several data sets in one run
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Color intensity measurements in CooRecorder 7.8.1 worked with only one "color intensity collector" (CI collector). That means that you could only use one set of parameters to describe where to collect your blue data, e.g. either from the dark side of latewood or from the light side of earlywood. If you wanted both you had to make a first run to collect latewood data and save it into a file and then set up the parameters to collect the earlywood data and then make a run to collect the data and save it into another file. With CooRecorder 8.1 you can have several collectors and have one set up to collect latewood data, another to collect earlywood data and a third to collect Delta-blue data. And all these collectors can be applied in one and the same run so that you get three separate .wid-files each with its own type of blue data. |
The Densitometer
| The Densitometer gives you a way to better understand how e.g. blue latewood from the dark side is collected. You can also see how the color intensity is distributed over the blue color spectra. |
Do you have incorrect blue channel calibration??
| For calibration of scanners, IT8.7/2 calibration cards are used together with a datafile containing colorimetric data read from that card (or from a copy out of the same batch of cards). With the help of special software like e.g. Lasersoft's "Silverfast" a color calibration procedure can then be performed. We would expect that if we then scan that same IT8.7/2 calibration card again on that same scanner, then we should get an image that complies with the colorimetric data given for that card. |
| If the image read from the calibrated scanner was a proper copy of the IT8.7/2 calibration card then all points above should be lined up around a straight diagonal line. This is obviously not the case for the dark blue values in the lower left corner of the diagram. The diagram above represents a mechanism in CooRecorder 8.1 by which you can analyze the quality of your scanner calibration. CooRecorder also has a calibration mechanism to compensate for minor errors (like those shown above) when you read blue channel data. |
Using CooRecorder for wood density measurements from an X-ray scanner image
| You can now use CooRecorder to retrieve density information from X-ray scanner images. |