Move an object in a image to simulate flow

I'm doing a project, where I need to segment cell images taken by a USB microscope. The cells is dissolved in a fluid solution, which runs through a tube. My microscope looks through the tube to detect if a cell has passed. My problem is that my microscope is pretty poor quality and it's almost impossible to segment the cell from the image. So my idea atm is to create a function in Matlab that simulates my Microscope by loading a random image from a folder.

So i want to know if anyone has a few ideas/tips to create a script, which create a set of images (eg. 100) i can use as input to the function. I have a few images of a cell in a decent quality i can use.

My basic idea is to use a for loop, where random noise is added to the image (imnoise) and the cell is placed in a random position. Ideally i want to place the cell in a new position each iteration, so it kinda simulates the flow through my tubes. Does anyone have an idea on how to do this?

Hope anyone can help me out!

The image attached shows how a few cells look like through a microscope.