tBits&#8203;(int[]&nbsp;significantBits)</pre>
<div class="block">Sets the number of significant bits for each band of the image.

 <p> The number of entries in the <code>significantBits</code>
 array must be equal to the number of output bands in the image:
 1 for a gray image, 2 for gray+alpha, 3 for index or truecolor,
 and 4 for truecolor+alpha.

 <p> The 'sBIT' chunk will encode this information.</div>
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