EX1,2,3: Python speckle pattern generator

[ScepticalRabbit]

Create a python script that can generate a DIC speckle pattern and save it as a *.tiff:

• Allow the user the specify the size of the dots in pixels
• Allow the user to specify the size of the speckle image in X x Y pixels
• Allow the user to specify white speckles on a black background or black speckles on a white background
• Allow the user to apply a gaussian blur to the speckles to smooth the edges
• Allow the user to specify the number of bits to encode the image (8 or 16)
• Allow the user to specify the black/white balance of the image (how large the dots are relative to the background

Getting started and hints:

• Start with a simple 25x25 pixel array and see if you can create a single 3 pixel radius dot in the centre of each 5x5 pixel square
• Plot this in Matplotlib
• Now randomly perturb the centre location of each 'dot' to make a random speckle pattern
• Do a calculation for the area of a circle inside a square, this will help with the black white balance - what radius does the circle need to be for it to be roughly the same area as the uncovered area of the square?

[ScepticalRabbit]

Example speckle image to show what we want to achieve:

[mikesmic]

@meganasampson have you started on this? I was going to make something quickly

[mikesmic]

I've made a noddy speckle generation script on the speckle branch. Feel free to improve

[lvkestrel]

Write the script as a function, which may then be called either by importing it, or through an 'if name == "main"' statement. need to check incoming parameters. Do we need this different for the two methods of operation

[lvkestrel]

there should be demo files 'light.png' and 'dark.png' for light and dark backgrounds. .gitignore is set to ignore all other .png files in the scripts folder

[lvkestrel]

script input is of the form speckle-gen.py Filename X Y -s Size -b Blur -i Bits -k Background -w Balance