Simulator 4

Simulator 4

Physical behavior of materials is a function of the phases present. In the image shown below, there are two phases present: pearlite (black phase) and ferrite (white). Using a threshold method, the volume fractions of one phase (pearlite) could be estimated. Here, 6 different thresholds have been used with their corresponding fraction of pearlite phase. Please choose which one is the correct estimate?

Optical Micrograph

Original Image

Predicted Threshold Micrograph

Option A

Option B

Option C

Option D

Option E

Option F

Threshold pixel: 40

Vol.% of black region: 5.4%

Threshold pixel: 60

Vol.% of black region: 11.0%

Threshold pixel: 80

Vol.% of black region: 18.6%

Threshold pixel: 100

Vol.% of black region: 28.5%

Threshold pixel: 120

Vol.% of black region: 45.7%

Threshold pixel: 140

Vol.% of black region: 76.6%