Reflectance to Status A Density; How to convert?

[greif]

I have calibration data for some 0/45 reflectance standards which is in spectral format of %R in 10nm increments. I need to check the accuracy of reflection densitometers which read Status A density (V,R,G,B).
What is the proper way to convert the spectral reflectances to density?
Thanks,
GR

 

[Andy Resnick]

It doesn't look very compact, but it seems to be a well-posed problem:

http://books.google.com/books?id=CzAbJrLin_AC&pg=PA393&lpg=PA393&dq=%22Status+A+density%22&source=bl&ots=32xXUFXt5b&sig=RW8FvhaTqO4ZVcIf51y7EqN5Y9Q&hl=en&ei=PBDJScecGoK8M7qcxecD&sa=X&oi=book_result&resnum=3&ct=result

(Page 393). You will also have to convert your spectral data into an (RGB) format, which is also not simple but well-posed.

 

[astrokreng]

I understand your need to accurately convert the reflectance data to status A density. The proper way to do this conversion is by using the Kubelka-Munk theory, which relates the reflectance and absorption of light in a material to its color and density. This theory takes into account the scattering and absorption of light by the material, and can accurately predict the density based on the spectral reflectance data.

To convert the spectral reflectances to density, you will need to use a mathematical model based on the Kubelka-Munk theory. This model will take into account the properties of the material, such as its thickness and refractive index, as well as the spectral reflectance data. By inputting these parameters into the model, you will be able to obtain an accurate conversion from reflectance to status A density.

It is important to note that the accuracy of the conversion will also depend on the accuracy of the calibration data for the 0/45 reflectance standards. Therefore, it is crucial to ensure that the calibration data is reliable and precise.

In conclusion, the proper way to convert spectral reflectances to status A density is by using a mathematical model based on the Kubelka-Munk theory. This will provide an accurate and reliable conversion for your reflection densitometers. I hope this information helps you in your research. Best of luck!