b>image</b></a> with one <a href="http://en.wikipedia.org/wiki/Channel_(digital_image)">channel</a>.</p>

<p><b>Compound Type Specifier Kind:</b>
<p>Specializing.

<p><b>Compound Type Specifier Syntax:</b>
<p><b>grayscale-image</b> <i>[{ height
    | <a href="http://www.lispworks.com/documentation/HyperSpec/Body/a_st.htm#ST">*</a>
    } { width
    | <a href="http://www.lispworks.com/documentation/HyperSpec/Body/a_st.htm#ST">*</a>
    }]</i>

<p><b>Compound Type Specifier Arguments:</b>
<p><i>height, width<