Is there a way to automatically sample color for gradient meshes from underlying image?

Currently I tried to create gradient meshes from an underlying image, what I do now is first create the shape then sample colors for each vertex one by one using an eyedropper. When you directly create a gradient mesh from an image, the colors are automatically sampled.

Is there a way to do similar thing such that the colors of all the vertices can be directly sampled at the same positions from the underlying image?