Compression not working on TIFF, through jmagick (on Android)?
Posted: 2015-03-12T10:19:57-07:00
Hi everyone. I'm new to jmagick and imagemagick, so please bare with me
here.
Short explanation of question/problem: How do I get the compression to
actually take when creating a tiff file?
Longer explanation: I'm doing some image manipulation on Android and have
jmagick working. I'm taking jpg image captures and adjusting the size,
grayscaling and then setting it to 2 colors and 1 bit per pixel. All of
this works fine and I end up with a file that is about 500K per image. I'm
allowing users to capture multiple images and then combine them into a
mutli-page document.
When I first get the image I do this:
Later, when combining the images, I do this:
The problem is that even though I have set compression and I do get a
multipage tiff, the resulting file is still large and doesn't show as
having compression set. This is the result of tiffinfo on the file:
Any thoughts?
Mark
here.
Short explanation of question/problem: How do I get the compression to
actually take when creating a tiff file?
Longer explanation: I'm doing some image manipulation on Android and have
jmagick working. I'm taking jpg image captures and adjusting the size,
grayscaling and then setting it to 2 colors and 1 bit per pixel. All of
this works fine and I end up with a file that is about 500K per image. I'm
allowing users to capture multiple images and then combine them into a
mutli-page document.
When I first get the image I do this:
Code: Select all
String path = params[0];
ImageInfo imageInfo = new ImageInfo(path);
MagickImage mImage = new MagickImage(imageInfo);
if(mImage.getWidth() > mImage.getHeight()) mImage =
mImage.rotateImage(90);
mImage = mImage.scaleImage(1728, 1728 * mImage.getHeight()
/ mImage.getWidth());
QuantizeInfo qInfo = new QuantizeInfo();
qInfo.setNumberColors(2);
qInfo.setTreeDepth(0);
qInfo.setColorspace(ColorspaceType.GRAYColorspace);
mImage.quantizeImage(qInfo); // This is what takes so much
time.
mImage.writeImage(imageInfo);Later, when combining the images, I do this:
Code: Select all
String outPath =
Environment.getExternalStorageDirectory().getAbsolutePath() +
"/Android/data/" +
getApplicationContext().getPackageName() + "/files/tmp.tiff";
ArrayList<String> paths = new ArrayList<>();
int count = gridViewAdapter.getCount();
MagickImage[] images = new MagickImage[count];
for(int i = 0; i < count; i++) {
paths.add(((ThumbnailViewItem)gridViewAdapter.getItem(i)).path);
Log.d(Util.getTag(getApplicationContext()), "Path: " +
paths.get(i));
ImageInfo imageInfo = new ImageInfo(paths.get(i));
images[i] = new MagickImage(imageInfo);
}
MagickImage combinedImage = new MagickImage(images);
ImageInfo newInfo = new ImageInfo(outPath);
newInfo.setFileName(outPath);
combinedImage.setMagick("TIFF");
combinedImage.setDepth(1);
combinedImage.setCompression(CompressionType.Group4Compression);
combinedImage.setUnits(ResolutionType.PixelsPerInchResolution);
combinedImage.setXResolution(200.00);
combinedImage.setYResolution(200.00);
combinedImage.writeImage(newInfo);
return combinedImage.imagesToBlob(newInfo);
multipage tiff, the resulting file is still large and doesn't show as
having compression set. This is the result of tiffinfo on the file:
Code: Select all
tiffinfo 0051e9a140b50bcd51ecc8b7fcce2b_23_O_0014645_1.tiff
TIFF Directory at offset 0x79808 (497672)
Image Width: 1728 Image Length: 2304
Resolution: 200, 200 pixels/inch
Bits/Sample: 1
Compression Scheme: None
Photometric Interpretation: min-is-black
FillOrder: msb-to-lsb
Orientation: row 0 top, col 0 lhs
Samples/Pixel: 1
Rows/Strip: 37
Planar Configuration: single image plane
Page Number: 0-1
DocumentName:Mark