Difference between intensity and gray scale value

[Jane.Yu]

Hi I am a new learner of NI vision, please bare with me.

1. I am quite confused by the terms of light intensity and gray scale value of pixels. Can anyone explain the difference to me? Or are they totally same thing? 

2. I am currently processing a Grayscale (I16) image file. The bit depth of the image is 12 Bits. But I saw someone used IMAQ Histograph with the Number of Classes set as 8192(13 Bit), don't know why.

Thanks, Jane

[David-A · Accepted solution]

Hello Jane,

1. Correct, gray scale and intensity are the same thing.

2. The number of calsses one selects is a judgement call.  By increasing or decreasing the number of classes the more or less granular the histogram becomes.  Without some context I cannot speculate as to why someone would use 8192 classes.

David A