Binarize CDR images via Java
Build your own Java apps to Binarize CDR image files using server-side APIs
How to Binarize CDR Files Using Java
The invention of color film marked a significant milestone in the realm of photography. However, classical photography is inherently linked to black and white imagery. Despite the extensive technical capabilities of cameras to capture the full spectrum of colors, many individuals opt for monochrome, transforming their pictures into black and white. In such instances, a binarization function comes into play, converting all pixels into binary values: "0" for white and "1" for black. In other scenarios, this conversion isn’t driven by artistic choices but practical ones, like preparing black and white illustrations for printing in books or newspapers. Using the Java graphics library, you can designate a pixel brightness threshold. Pixels with brightness values below this threshold will become black, while those above it will become white. Alternatively, you can employ an adaptive binarization method that considers the pixel values in the surrounding area. This approach results in smoother transitions between color boundaries in the resulting black and white image. In order to Binarize CDR files, we’ll use Aspose.Imaging for Java API which is a feature-rich, powerful and easy to use image manipulation and conversion API for Java platform. You can download its latest version directly from Maven and install it within your Maven-based project by adding the following configurations to the pom.xml.
Repository
<repository>
<id>AsposeJavaAPI</id>
<name>Aspose Java API</name>
<url>https://repository.aspose.com/repo/</url>
</repository>
Dependency
<dependency>
<groupId>com.aspose</groupId>
<artifactId>aspose-imaging</artifactId>
<version>version of aspose-imaging API</version>
<classifier>jdk16</classifier>
</dependency>
Steps to Binarize CDR via Java
You need the aspose-imaging-version-jdk16.jar to try the following workflow in your own environment.
- load CDR files with Image.Load method;
- binarize image;
- save binarized image to disc in the supported by Aspose.Imaging format.
System Requirements
Aspose.Imaging for Java is supported on all major operating systems. Just make sure that you have the following prerequisites.
- JDK 1.6 or higher is installed.
Binarize CDR images - Java
import com.aspose.imaging.IMultipageImage; | |
import com.aspose.imaging.Image; | |
import com.aspose.imaging.RasterImage; | |
import com.aspose.imaging.imageoptions.PngOptions; | |
import java.io.File; | |
import java.util.Arrays; | |
import java.util.LinkedList; | |
import java.util.List; | |
import java.util.function.Consumer; | |
binarizeFixed(); | |
public static void binarizeOtsu() | |
{ | |
// https://apireference.aspose.com/imaging/java/com.aspose.imaging/RasterImage#binarizeOtsu-- | |
filterImages(RasterImage::binarizeOtsu, "binarizeotsu"); | |
} | |
public static void binarizeBradley() | |
{ | |
filterImages(image -> | |
{ | |
// https://apireference.aspose.com/imaging/java/com.aspose.imaging/RasterImage#binarizeBradley-double- | |
image.binarizeBradley(0.5); | |
}, "binarizebradley"); | |
} | |
public static void binarizeFixed() | |
{ | |
filterImages(image -> | |
{ | |
// https://apireference.aspose.com/imaging/java/com.aspose.imaging/RasterImage#binarizeFixed-byte- | |
image.binarizeFixed((byte)70); | |
}, "binarizefixed"); | |
} | |
static String templatesFolder = "D:\\"; | |
public static void filterImages(Consumer<RasterImage> doFilter, String filterName) | |
{ | |
List<String> rasterFormats = Arrays.asList("jpg", "png", "bmp", "apng", "dicom", | |
"jp2", "j2k", "tga", "webp", "tif", "gif", "ico"); | |
List<String> vectorFormats = Arrays.asList("svg", "otg", "odg", "eps", "wmf", "emf", "wmz", "emz", "cmx", "cdr"); | |
List<String> allFormats = new LinkedList<>(rasterFormats); | |
allFormats.addAll(vectorFormats); | |
allFormats.forEach( | |
formatExt -> | |
{ | |
String inputFile = templatesFolder + "template." + formatExt; | |
boolean isVectorFormat = vectorFormats.contains(formatExt); | |
//Need to rasterize vector formats before background remove | |
if (isVectorFormat) | |
{ | |
inputFile = rasterizeVectorImage(formatExt, inputFile); | |
} | |
String outputFile = templatesFolder + String.format("%s_%s.png", filterName, formatExt); | |
System.out.println("Processing " + formatExt); | |
try (RasterImage image = (RasterImage) Image.load(inputFile)) | |
{ | |
doFilter.accept(image); | |
//If image is multipage save each page to png to demonstrate results | |
if (image instanceof IMultipageImage && ((IMultipageImage) image).getPageCount() > 1) | |
{ | |
IMultipageImage multiPage = (IMultipageImage) image; | |
final int pageCount = multiPage.getPageCount(); | |
final Image[] pages = multiPage.getPages(); | |
for (int pageIndex = 0; pageIndex < pageCount; pageIndex++) | |
{ | |
String fileName = String.format("%s_page%d_%s.png", filterName, pageIndex, formatExt); | |
pages[pageIndex].save(fileName, new PngOptions()); | |
} | |
} | |
else | |
{ | |
image.save(outputFile, new PngOptions()); | |
} | |
} | |
//Remove rasterized vector image | |
if (isVectorFormat) | |
{ | |
new File(inputFile).delete(); | |
} | |
} | |
); | |
} | |
private static String rasterizeVectorImage(String formatExt, String inputFile) | |
{ | |
String outputFile = templatesFolder + "rasterized."+ formatExt + ".png"; | |
try (Image image = Image.load(inputFile)) | |
{ | |
image.save(outputFile, new PngOptions()); | |
} | |
return outputFile; | |
} |
About Aspose.Imaging for Java API
Aspose.Imaging API is an image processing solution to create, modify, draw or convert images (photos) within applications. It offers: cross-platform Image processing, including but not limited to conversions between various image formats (including uniform multi-page or multi-frame image processing), modifications such as drawing, working with graphic primitives, transformations (resize, crop, flip&rotate, binarization, grayscale, adjust), advanced image manipulation features (filtering, dithering, masking, deskewing), and memory optimization strategies. It’s a standalone library and does not depend on any software for image operations. One can easily add high-performance image conversion features with native APIs within projects. These are 100% private on-premise APIs and images are processed at your servers.Binarize CDR via Online App
Binarize CDR documents by visiting our Live Demos website The live demo has the following benefits
CDR What is CDR File Format
A CDR file is a vector drawing image file that is natively created with CorelDRAW for storing digital image encoded and compressed. Such a drawing file contains text, lines, shapes, images, colours and effects for vector representation of image contents. CDR files can be opened with CorelDRAW as the primary application and can also be converted to other formats such as PDF, JPG, PNG, BMP and AI. It can be used for representation of various graphics data like brochures, tabloids, envelopes, and postcards. Besides CorelDRAW, other Corel products such as Corel Paintshop Pro and CorelDRAW Graphics suite can also open the CDR file formats.
Read MoreOther Supported Binarize Formats
Using Java, you can easily Binarize different formats including: