1. A method for image/video segmentation using texture feature, adopted for segmenting an image signal into plural texture color feature regions, the method comprising the steps of: (A) receiving the image signal including plural image pixels; (B) applying a Gabor filter bank for executing a Gabor filtering process on each of the plural image pixels, and executing a value operation process on an output of the Gabor filtering process; (C) designating each of the plural image pixels with a corresponding texture feature vector based on a result of the value operation process; (D) executing a segmentation process on the image signal based on the texture feature vector designated to each of the plural image pixels, so that the image signal has plural texture feature regions; and (E) executing a re-segmentation process on the plural color feature regions included in the image signal based on a distribution of the plural texture feature regions in the image signal, so that at least one of the color feature regions includes plural texture color feature regions; wherein the image pixels located in the same texture feature region have texture feature vectors with identical group and color feature vectors with identical group.