Alignment of rice grains

i want a code that aligns rice grains in a straight line. the image shows that the rice kernels are scattered around in different position. i want to change orientation of the kernels so that they appear in same position and also they are placed according to their size.

[DGM]

Start with:

1. binarize the image
2. use regionprops() to get bounding box, orientation, and area of all objects in the binary image
3. bounding box information to extract the objects
4. use orientation and imrotate() to orient the sub-images
5. use area to arrange them as you see fit

or something like that.

[sana fatima]

thank you so much for this but it would be great if you help me with the code with it.

[Rik]

DGM did help you. Now it is your turn: show what you have tried and which specific step is giving you trouble implementing it.