Instead of relying solely on filters, I would do this.

1) Desaturate the image.
2) Adjust the levels so that you pop the flowers from the background.
3) Duplicate that layer, and run a highpass on it. Make sure it only has the high-frequency detail in it.
4) Set this layer to multiply. Adjust the opacity of this layer so it adds the high frequency detail onto the lower layer.
5) Merge these layers together.
6) Take the dodge and burn tools, and manually paint in the rest of the height detail.

Making a bump/displacement map isn't an automatic process. You have to work at it.