Extract the MAX image gray value

I used the measurement and Automation Explorer (MAX) to align an image using a Basler scA640-70fm CCD camera, then save the image in TIFF and PNG. What I needed was the pixels of the image grayscale values. I used another program (ImageJ) to convert the TIFF/PNG files in image text (i.e. the values of grayscale in a .txt file). But when I did I noticed that the TIFF and PNG files for the same image produced very different pixel values. In addition, given that CCD camera bit depth 12, I expect the text image to have any pixels with a value greater than 4095 (2 ^ 12-1), but the highest pixel value in the text created from the TIFF image was in fact 36863; It seems, that is to say that the image is a 16-bit image.

I don't know what I need to fix. Is it not possible to use MAX to record a CCD image grayscale values?

Thank you

Neil

Hi Neil,

Use the PNG if you want to process the images.  PNG is a lossless format.  I never liked TIFF for 16-bit images.  When we implemented this code, the standard TIFF caught only supported images 8-bit and different vendors added support of 16 bits of different and incompatible ways.

-Jeff

Tags: NI Hardware

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