Image Statistics
Building the Cantata Workspace
-
Read the image gull.viff and display it using the
operators
User defined and
Display Image.
- Get the main statistics of the gull image using the
Statistics operator.
Show the contents of the statistics ASCII output file using the operator
File Viewer.
- Take the histogram distribution of the original image using the
Histogram operator. Plot the histogram using the
2D Plot operator.
- Repeat the steps above using the floating point image
spine.viff. Compute the histogram from 1000 to 2000 using
100 bins.
Exercises
- Display and take the histogram of the image lenina.viff.
What is the
minimum and maximum pixels values of the image? What you can say
regarding the range of gray-level used in the digitalization of
this image? Why the minimum value is not zero and why there are
so many values equal to 255? What are the names of those effects
in an image?
- Display and take the histogram of the image musc1.viff.
How many different cell population can you find in the image. Are
they represented clearly in the histogram?
What you learned
- Histogram of an image
- Get the main statistics parameters of an image
- Interpret the histogram of an image.
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