A computer-implemented method can comprise accessing a plurality of pixels representing an image and identifying at least two scanlines in the plurality of pixels. By analyzing the scanlines, a computing device carrying out the method can determine if the image is suited for slicing and, if the image is suited for slicing, the device can determine a slicing strategy by analyzing pixel values of the at least two scanlines. Data indicating the slicing strategy can be used to carry out a resizing operation and/or to generate structured code based on the slicing strategy, such as HTML and CSS code to generate a resizable element corresponding to the image. The slicing strategy can be determined independent of input defining or adjusting boundaries between slices.