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Didnt know if this is the write palce to put this, but im stuck on this assingment and i think it must have an easy solution so if someone could point me in the right direction then it would be much appreciated.

Using an appropriate software package, quantify the umbra and penumbral areas, normalised to the total image area, for the sunspot image provided (Sunspot image can be found on eBridge). Quantify and comment on the uncertainty in your measurements and discuss the significance of determining umbra and penumbral sunspot areas.

N/A

This is the third and final question on the assingment, i have done the other two but arnt quite sure where to start with this one.. the only idea i thought of would be to use something like photoshop and use circles to border the Umbra and Penumbra areas with minimal, max and average circles which would provide me with an area and then the min and max would provide me with an area, however this seems to be like it would provide extremly large errors

The only other option i thought of would be to count the pixels individuall of the Umbra and Penumbra, but this isnt something i think i could bring myself to do as im sure you could understand.

Any help is much appreciated.

## Homework Statement

Using an appropriate software package, quantify the umbra and penumbral areas, normalised to the total image area, for the sunspot image provided (Sunspot image can be found on eBridge). Quantify and comment on the uncertainty in your measurements and discuss the significance of determining umbra and penumbral sunspot areas.

## Homework Equations

N/A

## The Attempt at a Solution

This is the third and final question on the assingment, i have done the other two but arnt quite sure where to start with this one.. the only idea i thought of would be to use something like photoshop and use circles to border the Umbra and Penumbra areas with minimal, max and average circles which would provide me with an area and then the min and max would provide me with an area, however this seems to be like it would provide extremly large errors

The only other option i thought of would be to count the pixels individuall of the Umbra and Penumbra, but this isnt something i think i could bring myself to do as im sure you could understand.

Any help is much appreciated.