In this guide, we will take a look at how we can create a shape from an image file with an alpha channel or even from a CSS Gradient. This is a very flexible way to create shapes. Rather than drawing ...

The shape-image-threshold CSS property sets the alpha channel threshold used to extract the shape using an image as the value for { {cssxref ("shape-outside")}}.

Region-based descriptors often use moments to describe shapes. The discreet radial Tchebichef moment descriptors have been proposed. The radial Tchebichef moments are invariant with respect to image ...

PCA-whitening is applied to transform the shape contours into their canonical forms. The CSS image maxima are then extracted from those canonical contours as shape descriptors, which can be compared ...