Java Utililty Methods ImageIO Usage

List of utility methods to do ImageIO Usage

HOME
Java
I
ImageIO Usage

Description

The list of methods to do ImageIO Usage are organized into topic(s).

Method

void closeEL(ImageInputStream iis)
close EL

try {
 if (iis != null)
 iis.close();
} catch (Throwable t) {

IIOMetadataNode createAsciiField(int number, String name, String val)
create Ascii Field

IIOMetadataNode field, arrayNode, valueNode;
field = new IIOMetadataNode("TIFFField");
field.setAttribute("number", Integer.toString(number));
field.setAttribute("name", name);
arrayNode = new IIOMetadataNode("TIFFAsciis");
field.appendChild(arrayNode);
valueNode = new IIOMetadataNode("TIFFAscii");
arrayNode.appendChild(valueNode);
...

ImageWriteParam createImageWriteParam(ImageWriter writer, float quality)
create Image Write Param

ImageWriteParam param = writer.getDefaultWriteParam();
param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
param.setCompressionQuality(quality);
return param;

void deregisterProvider(final ServiceRegistry registry, final IIOServiceProvider provider, final Class category)
THIS METHOD WILL ME MOVED/RENAMED, DO NOT USE.

registry.deregisterServiceProvider(category.cast(provider), category);

ImageWriteParam getParams(ImageWriter writer)
get Params

ImageWriteParam param = writer.getDefaultWriteParam();
try {
 param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
 param.setCompressionQuality(1.0f);
} catch (Throwable ignored) {
return param;

int guessCompressionRatio(final ImageReaderWriterSpi spi)
Guesses the compression ratio for the given image format.

if (spi != null) {
 for (final String format : spi.getFormatNames()) {
 if (format.equalsIgnoreCase("png")) {
 return 4;
 if (format.equalsIgnoreCase("jpeg")) {
 return 8;
 if (format.equalsIgnoreCase("tiff")) {
 return 1;
 if (format.equalsIgnoreCase("bmp") || format.equalsIgnoreCase("raw")) {
 return 1;
return 0;

T lookupProviderByName(final ServiceRegistry registry, final String providerClassName)
THIS METHOD WILL ME MOVED/RENAMED, DO NOT USE.

try {
 return (T) registry.getServiceProviderByClass(Class.forName(providerClassName));
} catch (ClassNotFoundException ignore) {
 return null;

void setCompressionQuality(ImageWriteParam params, int quality)
set Compression Quality

if (quality <= 0) {
 quality = 1;
if (quality > 100) {
 quality = 100;
try {
 params.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
...