A common assumption of the shape from texture problem is that a perceived image mainly contains only one type of texture with the same surface orientations. Unfortunately, a natural image is often composed of textures with different surface orientations. In order to deal with the shape from texture problem in a practical manner, we need to segment these surface orientations. The ridges are wavelet attributes in which information about spatial frequencies resides. In this paper, we propose a robust method for treating this problem from the ridges of continuous wavelet transform. We demonstrate the performance of our method on textured images synthesized from the Brodatz texture and several natural images.