本文整理汇总了Java中javax.imageio.ImageReader.getDefaultReadParam方法的典型用法代码示例。如果您正苦于以下问题：Java ImageReader.getDefaultReadParam方法的具体用法？Java ImageReader.getDefaultReadParam怎么用？Java ImageReader.getDefaultReadParam使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类javax.imageio.ImageReader的用法示例。
在下文中一共展示了ImageReader.getDefaultReadParam方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: cut
import javax.imageio.ImageReader; //导入方法依赖的package包/类
public static BufferedImage cut(String format, InputStream src, int x, int y, int w, int h) throws IOException {
Iterator<ImageReader> iterator = ImageIO.getImageReadersByFormatName(format);
ImageReader reader = (ImageReader) iterator.next();
ImageInputStream iis = ImageIO.createImageInputStream(src);
reader.setInput(iis, true);
ImageReadParam param = reader.getDefaultReadParam();
int imgWidth = reader.getWidth(0);
int imgHeight = reader.getHeight(0);
if (x + w > imgWidth) {
w = imgWidth - x;
}
if (y + h > imgHeight) {
h = imgHeight - y;
}
Rectangle rect = new Rectangle(x, y, w, h);
param.setSourceRegion(rect);
BufferedImage bi = reader.read(0, param);
return bi;
}
示例2: newData
import javax.imageio.ImageReader; //导入方法依赖的package包/类
@Override
public void newData(byte[] bytes) {
if(Dashboard.visionInitialized()){
Mat m = CvProcessing.byteArray2Mat(bytes);
Dashboard.setForVision(m);
}
if(mode == DisplayMode.Normal){
ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
Iterator<?> readers = ImageIO.getImageReadersByFormatName("jpeg");
ImageReader reader = (ImageReader) readers.next();
Object source = bis;
try {
ImageInputStream iis = ImageIO.createImageInputStream(source);
reader.setInput(iis, true);
ImageReadParam param = reader.getDefaultReadParam();
BufferedImage image = reader.read(0, param);
setImage(image);
} catch (IOException e) {
}
}
}
示例3: read
import javax.imageio.ImageReader; //导入方法依赖的package包/类
public static BufferedImage read(String format, InputStream in) throws IOException {
Iterator<ImageReader> iterator = ImageIO.getImageReadersByFormatName(format);
ImageReader reader = (ImageReader) iterator.next();
ImageInputStream iis = ImageIO.createImageInputStream(in);
reader.setInput(iis, true);
ImageReadParam param = reader.getDefaultReadParam();
BufferedImage bi = reader.read(0, param);
return bi;
}
示例4: testCropFullHeightOffset
import javax.imageio.ImageReader; //导入方法依赖的package包/类
@Test
public void testCropFullHeightOffset() throws IOException {
ImageReader reader = getReader("prime_shaped.jpg");
TurboJpegImageReadParam param = (TurboJpegImageReadParam) reader.getDefaultReadParam();
param.setSourceRegion(new Rectangle(192, 9, 172, 500));
BufferedImage img = reader.read(0, param);
assertThat(img).hasDimensions(172, 500);
}
示例5: testType
import javax.imageio.ImageReader; //导入方法依赖的package包/类
private static void testType(ImageReader reader,
ImageTypeSpecifier t,
BufferedImage src)
throws IOException
{
ImageReadParam p = reader.getDefaultReadParam();
p.setDestinationType(t);
BufferedImage dst = reader.read(0, p);
verify(src, dst, t);
}
示例6: test
import javax.imageio.ImageReader; //导入方法依赖的package包/类
private static void test(String format) throws IOException {
System.out.println("Format: " + format);
BufferedImage src = createSrc();
ImageInputStream iis = prepareInput(src, format);
ImageReader reader = ImageIO.getImageReaders(iis).next();
reader.setInput(iis);
ImageReadParam p = reader.getDefaultReadParam();
int cnt = 0;
do {
System.out.println("cnt: " + cnt);
p.setSourceRegion(new Rectangle(width / 4, height / 4,
width / 2, height / 2));
BufferedImage dst = reader.read(0, p);
final Color c = new Color(dst.getRGB(10, 10), true);
if (!sameColor(c, srcColor)) {
throw new RuntimeException(
String.format("Test failed: read color 0x%X\n",
c.getRGB()));
}
} while (++cnt < max);
}
示例7: readTestImage
import javax.imageio.ImageReader; //导入方法依赖的package包/类
public static BufferedImage readTestImage(String fileName,
BufferedImage dest,
Rectangle srcROI)
{
BufferedImage bi = null;
try {
FileImageInputStream is =
new FileImageInputStream(new File(fileName));
ImageReader reader =
(ImageReader)ImageIO.getImageReaders(is).next();
ImageReadParam param = reader.getDefaultReadParam();
if (dest != null) {
param.setDestination(dest);
}
if (srcROI != null) {
param.setSourceRegion(srcROI);
}
reader.setInput(is);
bi = reader.read(0, param);
} catch (IOException e) {
System.err.println("Error " + e +
" when reading file: " + fileName);
throw new RuntimeException(e);
}
return bi;
}
示例8: testReadRegionAligned
import javax.imageio.ImageReader; //导入方法依赖的package包/类
@Test
public void testReadRegionAligned() throws IOException {
ImageReader reader = getReader("crop_aligned.jpg");
ImageReadParam param = reader.getDefaultReadParam();
param.setSourceRegion(new Rectangle(32, 32, 96, 96));
BufferedImage img = reader.read(0, param);
assertThat(img)
.hasDimensions(96, 96)
.hasNoPixelsOfColor(-1 /* white */);
}
示例9: testReadRegionUnaligned
import javax.imageio.ImageReader; //导入方法依赖的package包/类
@Test
public void testReadRegionUnaligned() throws IOException {
ImageReader reader = getReader("crop_unaligned.jpg");
ImageReadParam param = reader.getDefaultReadParam();
param.setSourceRegion(new Rectangle(116, 148, 204, 172));
BufferedImage img = reader.read(0, param);
assertThat(img)
.hasDimensions(204, 172)
.hasNoPixelsOfColor(-1 /* white */);
}
示例10: testReadUnalignedScaled
import javax.imageio.ImageReader; //导入方法依赖的package包/类
@Test
public void testReadUnalignedScaled() throws IOException {
ImageReader reader = getReader("crop_unaligned.jpg");
ImageReadParam param = reader.getDefaultReadParam();
param.setSourceRegion(new Rectangle(87, 111, 152, 129));
BufferedImage img = reader.read(1, param);
assertThat(img)
.hasDimensions(152, 129)
.hasNoPixelsOfColor(-1 /* white */);
}
示例11: testReadUnalignedRotated
import javax.imageio.ImageReader; //导入方法依赖的package包/类
@Test
public void testReadUnalignedRotated() throws IOException {
ImageReader reader = getReader("crop_unaligned_rot90.jpg");
TurboJpegImageReadParam param = (TurboJpegImageReadParam) reader.getDefaultReadParam();
param.setSourceRegion(new Rectangle(16, 16, 339, 319));
param.setRotationDegree(90);
BufferedImage img = reader.read(0, param);
assertThat(img)
.hasDimensions(319, 339)
.hasNoPixelsOfColor(-1 /* white */);
}
示例12: testReadRotated
import javax.imageio.ImageReader; //导入方法依赖的package包/类
@Test
public void testReadRotated() throws IOException {
ImageReader reader = getReader("crop_unaligned.jpg");
TurboJpegImageReadParam param = (TurboJpegImageReadParam) reader.getDefaultReadParam();
param.setRotationDegree(90);
BufferedImage img = reader.read(0, param);
img = img.getSubimage(192, 116, 172, 204);
// Need to copy the image so we can check the image data
BufferedImage copy = new BufferedImage(img.getWidth(), img.getHeight(), BufferedImage.TYPE_3BYTE_BGR);
Graphics g = copy.createGraphics();
g.drawImage(img, 0, 0, null);
assertThat(img).hasNoPixelsOfColor(-1);
}
示例13: testReadRegionRotated
import javax.imageio.ImageReader; //导入方法依赖的package包/类
@Test
public void testReadRegionRotated() throws IOException {
ImageReader reader = getReader("crop_unaligned.jpg");
TurboJpegImageReadParam param = (TurboJpegImageReadParam) reader.getDefaultReadParam();
param.setSourceRegion(new Rectangle(116, 148, 204, 172));
param.setRotationDegree(90);
BufferedImage img = reader.read(0, param);
assertThat(img)
.hasDimensions(172, 204)
.hasNoPixelsOfColor(-1 /* white */);
}
示例14: testUnalignedCropOnPrimeShaped
import javax.imageio.ImageReader; //导入方法依赖的package包/类
@Test
public void testUnalignedCropOnPrimeShaped() throws IOException {
ImageReader reader = getReader("prime_shaped.jpg");
TurboJpegImageReadParam param = (TurboJpegImageReadParam) reader.getDefaultReadParam();
param.setSourceRegion(new Rectangle(131, 57, 239, 397));
BufferedImage img = reader.read(0, param);
assertThat(img).hasDimensions(239, 397)
.hasNoPixelsOfColor(-1);
}
示例15: testCropFullWidth
import javax.imageio.ImageReader; //导入方法依赖的package包/类
@Test
public void testCropFullWidth() throws IOException {
ImageReader reader = getReader("prime_shaped.jpg");
TurboJpegImageReadParam param = (TurboJpegImageReadParam) reader.getDefaultReadParam();
param.setSourceRegion(new Rectangle(0, 192, 521, 172));
BufferedImage img = reader.read(0, param);
assertThat(img).hasDimensions(521, 172);
}