Creating 8-bit grey images

i want to create 8bit 256 grey level images using java.awt.image.BufferedImage.what should be the parameter i should use in the constructor to create one?

BufferedImage.TYPE_BYTE_GRAY

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Open previously created 32-bit HDR image in HDR Pro

It seems to me that it would be nice to be able to open previously-created 32-bit HDR files back in HDR Pro. I usually create a number of radiance files, which I can then process in different manners for different purposes. Photomatix and all other HDR proggies allow us to reopen a 32-bit file in HDR mode, why not CS5? It is a waste of time and effort to merge files every time I want to reprocess an HDR file to 16 bit.

Ah! My apologies. I didn't realize that the toning tools would come up (nor is it mentioned in the Adobe knowledgebase page I read on the subject of converting to 16/8 bit). I guess it should have been obvious, though, that there would need to be some control over how to map the tones. Actually, this appears to be the much better way to work with HDR tonemapping in CS5, since you have a real 100% preview, which is, sadly, lacking in the "real" HDR workspace. Great to have found this out.
Thanks,
Toby

How to create a 16-bit grayscale image from matrix of values

Hello all,
I'm having a problem converting a series of measurements into a specific image. I have a matrix of nxm dimensions (n and m variable), which contains measurement data. My intention is to transform this matrix into an image to be analyzed later on by an external software. The trick, however, is that the image has to be in 16-bit grayscale format: in grayscale for doing the image processing, and 16 bits to make sure that resolution is not hindered.
I've been looking around the web and still haven't found a way of somehow mapping the measurement values I have in that matrix into pixels (16-bit grayscale ones, that is). I have access to the Full Development System version of LabView, but not other toolboxes.
Does anyone have any suggestions?
Solved!
Go to Solution.

Hi everyone,
I've managed to get it to work thanks to some help from people on other forums. The key is to use the IMAQ driver, which gives the VIs necessary to create images on 16-bit grayscale (only supported nicely by PNG format apparently).
The discussion on the other forum can be found here: http://stackoverflow.com/questions/11101420/structure-of-16-bit-grayscale-image-to-be-generated-in-c...
The IMAQ driver can be found here: http://search.ni.com/nisearch/app/main/p/bot/no/ap/tech/lang/en/pg/1/sn/catnav%3adu,n13%3ahardwareDr...

How to encode 16bpp grey images in Jpeg2000?

Hi all.
First excuse me for my bad English.
I have a problem encoding JPEG2000 images. I have an image in a short array and I want to encode and seve it in a jpeg2000 file. I do the next:
(iw) is the JPEG2000 image writer.
SampleModel model =
RasterFactory.createBandedSampleModel(DataBuffer.TYPE_SHORT, w, h, 1);
WritableRaster raster = Raster.createWritableRaster(model, new Point(0, 0));
int ai1[] = new int[0];
for(int x = 0; x < w; ++x)
for(int y = 0; y < h; ++y)
ai1[0] = getPixel(x,y)
raster.setPixel(x, y, ai1);
iw.setOutput(fios);
iw.write(new IIOImage(raster,null,null));
fios.close();--------------------------------
The resulting image is corrupted.
If I set DataBuffer.TYPE_BYTE instead of DataBuffer.TYPE_SHORT it works fine but truncating data.
Then, How can I save 16bits grey image?
Thank you.
Edited by: francadaval on Mar 9, 2009 4:44 AM
Edited by: francadaval on Mar 9, 2009 4:48 AM
Edited by: francadaval on Mar 9, 2009 4:49 AM
Edited by: francadaval on Mar 9, 2009 4:50 AM

I can't reproduce this. I'm using JAI 1.1.3.
Are you sure that in this bit of code
int ai1[] = new int[0];
for(int x = 0; x < w; ++x)
    for(int y = 0; y < h; ++y)
        ai1[0] = getPixel(x,y);
        raster.setPixel(x, y, ai1);
}the method getPixel(x,y) is not returning 0?
Note that in this revised bit of code
SampleModel model =
     RasterFactory.createBandedSampleModel(DataBuffer.TYPE_USHORT, w, h, 1);
DataBuffer dBuffer = new DataBufferUShort(sPixs,w*h);
WritableRaster raster = Raster.createWritableRaster(model, dBuffer, new Point(0,0) );
iw.setOutput(fios);
iw.write(new IIOImage(raster,null,null));
fios.close();all you are doing is writing an empty image. You created a raster but don't set its elemnts. So the data buffer has all zeros (which is the color for black).

Unable to create an encrypted disk image in Lion

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Thanks for this Thomas.
I've tried naming the image differently, but still received the error, I did however try different permutations for the password.
The error seems to happen if I use a purely numerical password string and occurs on input of the 10th numerical character, if I start with numerical character but use an alpha before the 9th number I can continue and create a password, and I can create a password if I start with an alpha and switch to numerals after the first alpha character, purely alphabetical passwords are fine too.
It seems that Lion doesn't like purely numerical passwords greater than 9 characters, whereas Snow Leopard wasn't so fussy. Seems it's a bit of a bug.
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Unable to create an encrypted disk image with Disk Utility

Hi:
With our upgrade to Lion a few weeks ago, we're now unable to create an encrypted disk image of any type using Disk Utility any more. This problem occurs on 3 different machines, and is reproducible whether one is using an internal HD or an external FW HD. We can successfully create nonencrypted disk images.
This is a duplicate post with all the details here: https://discussions.apple.com/message/18469359#18469359
We haven't had any luck with a solution trying various permissions fixes as helpfully suggested by other readers in response to the error message # (-60008 error), so I'm hoping that someone else has run across a solution from the encrypted disk image perspective and that this tag line will generate some help.
Thank you!

Save As: 01 (on Desktop)
Name: 01
Size: 100 MB
Format: Mac OS Encrypted (Journaled)
Encryption: 256-bit AES
Partitions: Single partition- Apple Partition Map
Image Format: read/write disk image
At the password window that pops up I enter: 1234567890
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All works fine
Then I repeated this using:
Save As: 02 (on Desktop)
Name: 02
Size: 100 MB
Format: Mac OS Encypted (Journaled)
Encryption: 256-bit AES
Partitions: Single partition- Apple Partition Map
Image Format: read/write disk image
At the password window that pops up I enter: 1234567890 and when I start to enter the next "1" I get the "Unable to create "02.dmg." (error -60008)
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Disk Utility Version 12.1.1 (353)

Why do 16 bit greyscale images look significantly worse than 32 bit?

Howdy,
I am trying to display a greyscale image from a camera. Parts of the program are written by someone else, and the image comes in as a U16 array. I am using IMAQ create and IMAQ arraytoimage. The image displays perfectly if I use the 'float' inputs on the above to sub vi's, but if I use 16 bit or 8 bit, the image quality is terrible. I would like to be able to display the image as 16bit.
If I save the 16 bit image, and reopen it with another program, it's still just as bad. I have also tried converting the array to I16, and U8, but it makes no difference to the image quality.
From what I understand, there should be very little visible difference between 8, 16 and 32 bit greyscale images. Does anyone have any ideas where the problem might be? my next guess is the camera settings, but I'd love it to be something in my code..
Cheers,
Andy

Andy,
Thank you for contacting National Instruments. The key thing to note is that the image data type that LabVIEW uses is a signed interpretation so you need to do some more conversion to get an Unsigned 16-bit array to display properly as an NI-IMAQ image. Refer to the Knowledge Base: 16-bit Images in NI-Vision for more information on how to do this. Thanks and have a great day.
Regards,
Mark T
Applications Engineering | National Instruments

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I may have missed this in the previous versions of Adobe Photoshop.
Is there "a way / or method" to create repeating / tiled background images in photoshop?
Many times a "tile" for a tiled background is quite small at around 150px x 150px.
1:
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Yes it might be a bit like a kaleidescope, but it would be live and you would see any harshness in the pattern and can remedy glitches it in real time.
2:
It would also be very nice to be able to "draw / paint / edit" off the edge of the tile and have the effect carried over to the other side...
Yes just like in Asteroids.
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There will not be any substantial changes to CS6 to add new features beyond the beta. We are too far along in the process for that. To accomplish what you desire, can you use the pattern feature to tile? For any new features you wish to request, you can to to this website http://feedback.photoshop.com/photoshop_family people can vote on the favorite features.
Pattie
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Choose Edit > Define Pattern.
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How to create a grayscale georaster image

Hi,
This is the code that i am using to create a georaster template image.
sdo_geor.createTemplate(idw_img, 21001,
'dimSize=(512,512,3) cellDepth=32BIT_REAL interleaving=BIP ',
null, 'TRUE');
Anyways, the above code works and when i try to export, i can see a rgb image file.
But, i need to create a grayscale image. Can anyone let me know how can i specify and create a grayscale georaster image. Please note that my cell values are decimals type.
Thanks,
Bal

Balaji,
In your second command, you copied the "*" from my post. That is not part of the command. It supposed to turn the text into bold. Sorry for the misunderstanding.
My suggestion was for you to try to work with a single-band image. I don't know what are the other commands you have in your code but are you sure that the error message "invalid band and layer number" is coming from sdo_geor.createTemplate? You might have some code after that is still expecting the 3 bands and that is where the error is coming from.
So here is the summary:
If what you want to see is a "grayscale" image and your data type is 32BIT_REAL, there is no need to 3 bands. If you have to have 3 bands. You can use GeoRasterViewer and play with the option "View>Show Layer Mapping" or alt+p to select the band you want to see. If you want to see band 1, select "1" for Red, "1" for Green and "1" for Blue and click on "Refresh".
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Regards,
Ivan

Can't create text on this image in PSE10

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Ken

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Before/after: LR4.1 for 32-bit HDR images - wow!

I have given the new support in LR4.1 for 32-bit HDR images a try. I'm very impressed.
Here's an old version (Photomatix I think) of an HDR I shot a few years ago:
Not so bad, huh?
Now look what I could do after creating a 32-bit tiff and importing into Lightroom:
The new defringing is awesome to have. The fringes can become so very visible otherwise when making HDR.
I've got all the gory details of how I did this on my blog:
http://davidnaylor.org/blog/2012/05/lightroom-4-32-bit-hdr-editing/
Anyone else who has given this a spin?

Actually, I think I may have been wrong there. I believe I actually used
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to anything Photomatix would produce.
Den 3 maj 2012 00:46 skrev "Susan S." <[email protected]>:
Re: Before/after: LR4.1 for 32-bit HDR images - wow! created by Susan
S. <http://forums.adobe.com/people/Susan+S.> in Photoshop Lightroom - View
the full discussion <http://forums.adobe.com/message/4375488#4375488

Create a new Buffered Image using Raster and ColorModel

Sorry , I crosspost this message,because no one reply.
Recently,I write a programme combining C++ and Java .
The C++ part create a array containing image data in form of BI_RGB and biBitCount==32.
The java part create a image using Raster and ColorModel like this:
   static int[] data ;
   DataBuffer db = new DataBufferInt(data, data.length);
   WritableRaster wr =Raster.createPackedRaster(db, 1024,768, 32, null);
   ColorModel cm = new DirectColorModel(32,0xff0000,0x00ff00,0x0000ff);
   img = new BufferedImage(cm, wr, false, null);But it doesn't work .
it report this:
Exception in thread "main" java.lang.IllegalArgumentException: Raster sun.awt.im
age.SunWritableRaster@dff3a2 is incompatible with ColorModel DirectColorModel: r
mask=ff0000 gmask=ff00 bmask=ff amask=0
at java.awt.image.BufferedImage.<init>(BufferedImage.java:549)
at monitor.test.Perform2.main(Perform2.java:39)

hey epico
compiles & runs 4 me
see javadocs for SinglePixelPackedSampleModel
import java.awt.image.*;
public class Tester {
DataBuffer db;
WritableRaster wr;
ColorModel cm;
BufferedImage im;
int[] data;
int[] masks;
int w = 768;
int h = 576;
public Tester() {
    data = new int[768*576];
    for (int i = 0;i < w*h ;i++ ) {
      data[i] = 0;
    masks = new int[3];
    masks[0] = 0xff0000;
    masks[1] = 0x00ff00;
    masks[2] = 0x0000ff;
    db = new DataBufferInt(data,data.length);
    SinglePixelPackedSampleModel sm = new SinglePixelPackedSampleModel(DataBuffer.TYPE_INT,w,h,masks);
    cm = new DirectColorModel(32,0xff0000,0x00ff00,0x0000ff);
    wr = Raster.createWritableRaster(sm,db,null);
    im = new BufferedImage(cm,wr,false,null);
public static void main(String[] args) {
    Tester tester1 = new Tester();
}

How can I create a java.awt.Image from ...

Hi all,
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Thanks.

JPanel p;
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Graphics2D g = image.createGraphics();
p.paint(g);
g.dispose();

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How can I create a high res image gallery, need to have print res photos for a pressroom section.

If you want Muse to "pass through" your images and not adjust, compress, crop etc - you need to place your images in the lightbox EXACTLY at the right size, pre-cropped and prepped in Photoshop.
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Creating 8-bit grey images

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