Details
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Type:
Bug
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Status: Closed
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Priority:
Major
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Resolution: Won't Fix
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Affects Version/s: 5.1
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Fix Version/s: 6.0
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Component/s: Core/Parsing
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Labels:None
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Environment:Windows 7 x64, Java 7u21
Description
I extract page images using this code:
for (int index = 0, size = doc.getNumberOfPages(); index < size; index++) {
for(float zoom: new float[]{1f, 1.5f, 2f}) {
IDocumentPage page = new DocumentPage();
BufferedImage image = (BufferedImage) doc.getPageImage(index,
GraphicsRenderingHints.SCREEN, Page.BOUNDARY_CROPBOX, 0f, zoom);
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ImageIO.write(image, "png", bos);
page.setNumber(index);
page.setZoom(zoom);
page.setByteData(bos.toByteArray());
} catch (IOException e) {
throw new IllegalArgumentException("Can't divided document to pictures", e);
}
saveImage(page);
}
}
After migrating to IcePDF 5.1.0 image quality became poorer. See attached example and source pdf. Changing properties described here http://www.icesoft.org/wiki/display/PDF/System+Properties doesn't help at all.
for (int index = 0, size = doc.getNumberOfPages(); index < size; index++) {
for(float zoom: new float[]{1f, 1.5f, 2f}) {
IDocumentPage page = new DocumentPage();
BufferedImage image = (BufferedImage) doc.getPageImage(index,
GraphicsRenderingHints.SCREEN, Page.BOUNDARY_CROPBOX, 0f, zoom);
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ImageIO.write(image, "png", bos);
page.setNumber(index);
page.setZoom(zoom);
page.setByteData(bos.toByteArray());
} catch (IOException e) {
throw new IllegalArgumentException("Can't divided document to pictures", e);
}
saveImage(page);
}
}
After migrating to IcePDF 5.1.0 image quality became poorer. See attached example and source pdf. Changing properties described here http://www.icesoft.org/wiki/display/PDF/System+Properties doesn't help at all.
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Not actually, we don't use any system properties for IcePDF.
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Yury Shulhat
added a comment - Not actually, we don't use any system properties for IcePDF.
Try the following system property, -Dorg.icepdf.core.imageReference=smoothScaled
This will enable image scaling and should yield similar results to version 4.x
Show
Patrick Corless
added a comment - Try the following system property, -Dorg.icepdf.core.imageReference=smoothScaled
This will enable image scaling and should yield similar results to version 4.x
User has been given an option to try and tweak the image rendering. In earlier versions we applied the equivalent of smoothScaled. The default behavior in 5.x is not to scale the image which may lead to image that don't look as good at low zoom values, however the memory usage is significantly reduced as a result.
Show
Patrick Corless
added a comment - User has been given an option to try and tweak the image rendering. In earlier versions we applied the equivalent of smoothScaled. The default behavior in 5.x is not to scale the image which may lead to image that don't look as good at low zoom values, however the memory usage is significantly reduced as a result.
Are you running ICEpdf with any system properties?