<stop offset="0%" stop-color="white" stop-opacity="1.0" />
<stop offset="50%" stop-color="white" stop-opacity="0.7" />
<stop offset="100%" stop-color="white" stop-opacity="0.0" />
<ellipse cx="225" cy="150" rx="225" ry="150" fill="url(#fade)" />
<image xlink:href="http://bucarotechelp.com/design/graphics/images/leaves.jpg" x="0" y="0" width="480" height="353" mask="url(#fademask)" />
Masking is a similar to clipping, except that clipping defines an area of a graphic element that will be visible and makes a sharp boarder between the visible and clipped areas. A mask defines an area where each pixel of the mask has a degree of transparency and opaqueness that lets some of the graphic element show through, making a blurry boundary between the visible and masked areas.
In the example shown above, a radial gradient is defined and given an id of "fade". A mask is defined and given an id of "fademask". The radial gradient is then used as the fill of the mask. The image leaves.jpg is then loaded with xlink:href and the mask is used with the mask attribute in the leaves image tag.
A mask works by using its alpha channel to allow or block pixels of the image from showing through. The less opaque a part of the mask is, the less visible that part of the image will be. you can make the mask stop-colors any color you like, but it will turn out white in the result because mask uses only the transparency bits of the mask.
Learn more at amazon.com
More Graphics Design Tips:
• XDdom 3D Axis and Coordinate System
• Paint.Net Ink Sketch, Oil Painting, and Pencil Sketch Artistic Effects
• Coding a Matrice in MathML
• What is Blender? The Software's Origins and Evolution
• SVG Matrix Transform Example Code
• How to Create a Product Box in Photoshop
• Krita Paint plus Vector Drawing Portable Application
• Inkscape Shadows and Highlights
• SVG For Responsive Web Design
• Inkscape - How to Delete a Node