what toolbox functions can i use for shape and object recognition

Hi, i have a question about an assignment i have to do. In a assigment i need to do 3 things: I take a picture of a IC integrated circuit on a black piece of paper. Then i imread it into my program.

1 - Count the amount of pins on a IC (integrated circuit) - DONE with thresholding a bw image + dilation + labeling and regionprops. That is can sort of do.

2 - The program needs to recognize if its NOT a picture of a IC (integrated circuit). I know is asked but i dont know what toolbox function would me suited. I guess some toolbox function do shape / object recognition? but i cant determin what is best.

3 - The program need to check if all the pins are connected to the body of the ic. IC's always have a even number of pins so that shall be a if else construction.

I especially need help with 2.

code can be provided