import net.imagej.ops.OpService; //导入依赖的package包/类
@Override
@Before
public void setUp() {
	context = new Context(OpService.class);
	ops = context.service(OpService.class);

	in = ArrayImgs.bytes(20, 20, 21);
	out = ArrayImgs.bytes(20, 20, 21);

	// fill array img with values (plane position = value in px);

	for (final Cursor<ByteType> cur = in.cursor(); cur.hasNext();) {
		cur.fwd();
		cur.get().set((byte) cur.getIntPosition(2));
	}
}
 

import net.imagej.ops.OpService; //导入依赖的package包/类
@Before
public void setUp() {
	context = new Context();
	ops = context.service(OpService.class);
}
 

import net.imagej.ops.OpService; //导入依赖的package包/类
@Override
protected Context createContext() {
	return new Context(OpService.class);
}
 

import net.imagej.ops.OpService; //导入依赖的package包/类
@Override
protected Context createContext() {
	return new Context(OpService.class, OpMatchingService.class,
		CacheService.class, StatusService.class, SCIFIOService.class);
}
 

import net.imagej.ops.OpService; //导入依赖的package包/类
@Override
protected Context createContext() {
	return new Context(OpService.class, OpMatchingService.class,
		CacheService.class, ScriptService.class);
}
 

import net.imagej.ops.OpService; //导入依赖的package包/类
/**
 * Converts the {@link ImgPlus} to a new ImgPlus with {@link BitType}
 * elements.
 * <p>
 * Also copies ImgPlus metadata.
 * </p>
 * 
 * @param ops an {@link OpService} to find the necessary ops for conversion.
 * @param imgPlus an image.
 * @param <C> type of the elements in the input image.
 * @return the image converted to bit type.
 */
public static <C extends ComplexType<C>> ImgPlus<BitType> toBitTypeImgPlus(
	OpService ops, final ImgPlus<C> imgPlus)
{
	final Img<BitType> convertedImg = ops.convert().bit(imgPlus.getImg());
	final ImgPlus<BitType> convertedImgPlus = new ImgPlus<>(convertedImg);
	copyMetadata(imgPlus, convertedImgPlus);

	return convertedImgPlus;
}