21-11-2012, 01:00 PM
Image Analysis:
imageAnalysis.ppt (Size: 5.64 MB / Downloads: 57)
To utilize the information contained in the digital image data matrix for the purpose of quantification.
Particle Counts
Area measurements
Mean particle diameter
Length or Size distribution
Image Analysis:
Any four year old can tell the difference but even the most sophisticated computers would have difficulty making the distinction.
First step is create a binary image based on some cut off value for pixel intensity.
A binary image can also be adjusted to cover a subset of pixel values.
In cases where the objects of interest are quite distinct it can be relatively straightforward to distinguish them based on pixel value alone.
Sometimes simple thresholding is insufficient in defining those features one wishes to count, especially if the objects are touching each other making it difficult to distinguish one object from another.
Adjusting the contrast of the image may help the operator identify the objects of interest but the computer would still have difficulty identifying the objects.