Contour plot of fluorescent slide

[raacampbell]

Take image of a uniform slide in ScanImage then run function to analyse it. The function should do the following:

• jet(10) the image with colour changes every 10%. Add contour lines too. We care about this because SNR drop is roughly the sqrt of the intensity drop.
• Also add next to it a histogram of the intensities so we know how much of the range is being filled.
• Digitizer range and PMT gain logged in the figure.
• Add a scale bar to this plot. Label it.
• And colorbar that shows what the contours are.
• Also plot two profiles through the centre line so we can see drop off. Have the percentages in the line plots. Area plot with different colours, etc.

For testing we can run this from a saved scanimage file, this will contain the extra info. If just a matrix is provided, then the digitzer info and so on is just missing. The scale will also be missing.