Converting 10-bit image to RGB 24
I am using the IMAQ 1409 board to acquire black and white image in 10-bit format. Using the vision software I am type-casting this image into an RGB image. Later am saving the images into an AVI file using VIs from developer zone. The images are saved as RGB 24 bit on the AVI file. Am I losing resolution/information when going from 10-bit to RGB 24?
Carlos,
During the conversion process, the 10 bit image is converted to 8 bits, which is the maximum grayscale range for an RGB image. You are losing some information, but it is likely that it is not significant. For most applications, 8 bit grayscale is adequate.
Bruce
Bruce Ammons
Ammons Engineering
Similar Messages
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Need conversion mechanism for converting 24 bit image to 16 bit
In my java project I need to convert 24 bit image to 16 bit image. I don't have any clue. Please provide me the option to implement it.
Thanks,
jaiThat doesn't tell me much, and I know what you're talking about. I doubt that it tells the OP anything useful whatsoever.Sorry EJP, it was a mouthful I know. Maybe this will help instead, a ColorConversionOps class to work on *32 bit > 16 bit > 32 bit colors*. To help clarify where the 16 bit color input and output goes, some of the methods return or require parameters of type short. Also take notice the bitmask for variables of type short vs the bitmasks for int. AND pay particular attention to the unsigned right bit-shifting of the most-significant-digit.
public class ColorConversionOps
public static short convert32_16(int rgb) {
int a = ((rgb & 0xF0000000) >>> 16);
int r = ((rgb & 0x00F00000) >> 12);
int g = ((rgb & 0x0000F000) >> 8);
int b = ((rgb & 0x000000F0) >> 4);
return (short)( a | r | g | b);
public static int convert16_32(short rgb) {
int a = ((rgb & 0xF000) << 16);
int r = ((rgb & 0x0F00) << 12);
int g = ((rgb & 0x00F0) << 8);
int b = ((rgb & 0x000F) << 4);
return (a | r | g | b);
public static void printRGB_32(int rgb) {
System.out.println("a="+((rgb & 0xFF000000) >>> 24));
System.out.println("r="+((rgb & 0x00FF0000) >> 16));
System.out.println("g="+((rgb & 0x0000FF00) >> 8));
System.out.println("b="+ (rgb & 0x000000FF));
System.out.println();
public static void printRGB_16(short rgb) {
System.out.println("a="+((rgb & 0xF000) >>> 12));
System.out.println("r="+((rgb & 0x0F00) >> 8));
System.out.println("g="+((rgb & 0x00F0) >> 4));
System.out.println("b="+ (rgb & 0x000F));
System.out.println();
}Now to make the conversion from 32 bit color to 16 bit color and back. NOTICE there willl be a loss of precision -- just like someone else has already said.
public class Test
public static void main(String[] args)
int rgb = 0xFFFFFFFF;
ColorConversionOps.printRGB_32(rgb);
//a=255
//r=255
//g=255
//b=255
rgb = ColorConversionOps.convert32_16(rgb);
ColorConversionOps.printRGB_16((short)rgb);
//a=15
//r=15
//g=15
//b=15
rgb = ColorConversionOps.convert16_32((short)rgb);
ColorConversionOps.printRGB_32(rgb);
//a=240
//r=240
//g=240
//b=240
}And now we see, the reason 16bit color is so unpopular to the rest of the world, but not for us here! -
Converting cmyk compressed images to rgb compressed format
Hi,
I need some help in converting of CMYK images to RGB images. I got some sample code from internet but I get some run time exceptions with that and I'm not able to figure out the reason for the same. Pls help me in fixing the same. Any help will be sincerely appreicated.
The code is given below :
import java.awt.image.*;
import java.awt.image.renderable.*;
import java.awt.color.*;
import java.awt.event.*;
import java.awt.*;
import java.io.*;
import java.net.*;
import javax.media.jai.*;
import com.sun.image.codec.jpeg.*;
public class CMYKTest1 {
public static void main(String args[]) throws Exception{
RenderedOp op = JAI.create("fileload", "Kristopher Brock LOGO.jpg");
ColorModel rgbcm = op.getColorModel();
ICC_Profile profile = ICC_Profile.getInstance("CMYK.pf");
// ICC_Profile profile = ICC_Profile.getInstance(ColorSpace.TYPE_CMYK);
ICC_ColorSpace icp = new ICC_ColorSpace(profile);
ColorModel colorModel =
RasterFactory.createComponentColorModel(op.getSampleModel().getDataType(),
icp,
false,
false,
Transparency.OPAQUE);
ImageLayout il = new ImageLayout();
il.setSampleModel(colorModel.createCompatibleSampleModel(op.getWidth(),
op.getHeight()));
RenderingHints hints = new RenderingHints(JAI.KEY_IMAGE_LAYOUT, il);
ParameterBlock pb = new ParameterBlock();
pb.addSource(op).add(colorModel);
op = JAI.create("ColorConvert", pb, hints);
pb = new ParameterBlock();
pb.addSource(op).add(rgbcm);
il = new ImageLayout();
il.setSampleModel(rgbcm.createCompatibleSampleModel(op.getWidth(),
op.getHeight()));
hints = new RenderingHints(JAI.KEY_IMAGE_LAYOUT, il);
op = JAI.create("ColorConvert", pb, hints);
JAI.create("filestore", op, "earthrgb.jpg", "JPEG", null);
BufferedImage img = op.getAsBufferedImage(null, null);
OutputStream fout = new FileOutputStream("earthrgb1.jpg");
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(fout);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(img);
param.setQuality(1, false);
param.setXDensity(300);
param.setYDensity(400);
encoder.encode(img, param);
fout.close();
}I get the following error:
Caused by: java.lang.IllegalArgumentException: Numbers of source Raster bands and source color space components do not match
at java.awt.image.ColorConvertOp.filter(Unknown Source)
at com.sun.media.jai.opimage.ColorConvertOpImage.computeRectNonColorSpaceJAI(ColorConvertOpImage.java:373)
at com.sun.media.jai.opimage.ColorConvertOpImage.computeRect(ColorConvertOpImage.java:290)
at javax.media.jai.PointOpImage.computeTile(PointOpImage.java:914)
at com.sun.media.jai.util.SunTileScheduler.scheduleTile(SunTileScheduler.java:904)
at javax.media.jai.OpImage.getTile(OpImage.java:1129)
at javax.media.jai.PointOpImage.computeTile(PointOpImage.java:911)
at com.sun.media.jai.util.SunTileScheduler.scheduleTile(SunTileScheduler.java:904)
at javax.media.jai.OpImage.getTile(OpImage.java:1129)
at com.sun.media.jai.codecimpl.JPEGImageEncoder.encode(JPEGImageEncoder.java:173)
at com.sun.media.jai.opimage.EncodeRIF.create(EncodeRIF.java:70)
... 24 more
Error: One factory fails for the operation "filestore"
Occurs in: javax.media.jai.ThreadSafeOperationRegistry
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at javax.media.jai.FactoryCache.invoke(FactoryCache.java:122)
at javax.media.jai.OperationRegistry.invokeFactory(OperationRegistry.java:1674)
at javax.media.jai.ThreadSafeOperationRegistry.invokeFactory(ThreadSafeOperationRegistry.java:473)
at javax.media.jai.registry.RIFRegistry.create(RIFRegistry.java:332)
at javax.media.jai.RenderedOp.createInstance(RenderedOp.java:819)
at javax.media.jai.RenderedOp.createRendering(RenderedOp.java:867)
at javax.media.jai.RenderedOp.getRendering(RenderedOp.java:888)
at javax.media.jai.JAI.createNS(JAI.java:1099)
at javax.media.jai.JAI.create(JAI.java:973)
at javax.media.jai.JAI.create(JAI.java:1668)
at CMYKTest1.main(CMYKTest1.java:79)
Caused by: javax.media.jai.util.ImagingException: All factories fail for the operation "encode"
at javax.media.jai.OperationRegistry.invokeFactory(OperationRegistry.java:1687)
at javax.media.jai.ThreadSafeOperationRegistry.invokeFactory(ThreadSafeOperationRegistry.java:473)
at javax.media.jai.registry.RIFRegistry.create(RIFRegistry.java:332)
at com.sun.media.jai.opimage.FileStoreRIF.create(FileStoreRIF.java:138)
... 15 moreThanks & Regards,
Magesh.The following code converts an cmyk jpeg image into an rgb jpeg image.
The only problem if this code is that it loads the whole image in memory and thus you'll need a lot of RAM when converting large images. For example, it take around 300 MB to convert a 3000*3800px image (this is a 5MB jpeg image when compressed on disk).
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.metadata.IIOMetadataNode;
import java.util.*;
import java.io.*;
import java.awt.image.*;
import java.awt.*;
import java.awt.color.ColorSpace;
import org.w3c.dom.NodeList;
public class Test {
public static void main(String[] args) throws Exception {
BufferedImage i1 = readImage(new File("cmyk.jpg"));
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(new File("rgb.jpg")));
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(i1);
param.setQuality(1, false);
encoder.setJPEGEncodeParam(param);
encoder.encode(i1);
public Test() {
// extract metadata
public static BufferedImage readImage(File file) throws IOException {
// Get an ImageReader.
ImageInputStream input = ImageIO.createImageInputStream(file);
Iterator readers = ImageIO.getImageReaders(input);
if (readers == null || !readers.hasNext()) {
throw new RuntimeException("No ImageReaders found");
ImageReader reader = (ImageReader) readers.next();
reader.setInput(input);
String format = reader.getFormatName();
if ("JPEG".equalsIgnoreCase(format) || "JPG".equalsIgnoreCase(format)) {
IIOMetadata metadata = reader.getImageMetadata(0);
String metadataFormat = metadata.getNativeMetadataFormatName();
IIOMetadataNode iioNode = (IIOMetadataNode) metadata.getAsTree(metadataFormat);
NodeList children = iioNode.getElementsByTagName("app14Adobe");
if (children.getLength() > 0) {
iioNode = (IIOMetadataNode) children.item(0);
int transform = Integer.parseInt(iioNode.getAttribute("transform"));
Raster raster = reader.readRaster(0, reader.getDefaultReadParam());
if (input != null) {
input.close();
reader.dispose();
return createJPEG4(raster, transform);
throw new RuntimeException("No ImageReaders found");
* Java's ImageIO can't process 4-component
* images
* <p/>
* and Java2D can't apply AffineTransformOp
* either,
* <p/>
* so convert raster data to
* RGB.
* <p/>
* Technique due to MArk
* Stephens.
* <p/>
* Free for any
* use.
private static BufferedImage createJPEG4(Raster raster, int xform) {
int w = raster.getWidth();
int h = raster.getHeight();
byte[] rgb = new byte[w * h * 3];
// if (Adobe_APP14 and transform==2) then YCCK else CMYK
if (xform == 2) { // YCCK -- Adobe
float[] Y = raster.getSamples(0, 0, w, h, 0, (float[]) null);
float[] Cb = raster.getSamples(0, 0, w, h, 1, (float[]) null);
float[] Cr = raster.getSamples(0, 0, w, h, 2, (float[]) null);
float[] K = raster.getSamples(0, 0, w, h, 3, (float[]) null);
for (int i = 0, imax = Y.length, base = 0; i < imax; i++, base += 3) {
float k = 220 - K, y = 255 - Y[i], cb = 255 - Cb[i], cr = 255 - Cr[i];
double val = y + 1.402 * (cr - 128) - k;
val = (val - 128) * .65f + 128;
rgb[base] = val < 0.0 ? (byte) 0 : val > 255.0 ? (byte) 0xff : (byte) (val + 0.5);
val = y - 0.34414 * (cb - 128) - 0.71414 * (cr - 128) - k;
val = (val - 128) * .65f + 128;
rgb[base + 1] = val < 0.0 ? (byte) 0 : val > 255.0 ? (byte) 0xff : (byte) (val + 0.5);
val = y + 1.772 * (cb - 128) - k;
val = (val - 128) * .65f + 128;
rgb[base + 2] = val < 0.0 ? (byte) 0 : val > 255.0 ? (byte) 0xff : (byte) (val + 0.5);
else {
// assert xform==0: xform;
// CMYK
int[] C = raster.getSamples(0, 0, w, h, 0, (int[]) null);
int[] M = raster.getSamples(0, 0, w, h, 1, (int[]) null);
int[] Y = raster.getSamples(0, 0, w, h, 2, (int[]) null);
int[] K = raster.getSamples(0, 0, w, h, 3, (int[]) null);
for (int i = 0, imax = C.length, base = 0; i < imax; i++, base += 3) {
int c = 255 - C[i];
int m = 255 - M[i];
int y = 255 - Y[i];
int k = 255 - K[i];
float kk = k / 255f;
rgb[base] = (byte) (255 - Math.min(255f, c * kk + k));
rgb[base + 1] = (byte) (255 - Math.min(255f, m * kk + k));
rgb[base + 2] = (byte) (255 - Math.min(255f, y * kk + k));
// from other image types we know InterleavedRaster's can be
// manipulated by AffineTransformOp, so create one of
// those.
raster = Raster.createInterleavedRaster(new DataBufferByte(rgb, rgb.length), w, h, w * 3, 3, new int[]{0, 1, 2}, null);
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
ColorModel cm = new ComponentColorModel(cs, false, true, Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
return new BufferedImage(cm, (WritableRaster) raster, true, null); -
Convert 256-bit image to one-bit
I want to convert 256-bit bmp image to 1-bit.So please help me.
armalcolm wrote:
OK here's a frameworkUmm... Drawing onto a BI of TYPE_BYTE_BINARY should achieve this in just a few lines. The API says
When color data is stored in an image of this type, the closest color in the colormap is determined by the IndexColorModel and the resulting index is stored. Approximation and loss of alpha or color components can result, depending on the colors in the IndexColorModel colormap.
Of course, if this is homework then OP will probably be required to reinvent the wheel.
db -
Quicktime converting 24 bit images to 16 bit images on paste
I am doing image processing of a QuickTime (7.1.5 pro) movie in Photoshop (CS2) using Applescript. When I copy an image (either with Applescript or manually) and paste it into a new QuickTime Player movie the image gets converted to a video depth of 16 (thousands) rather than 24. I have tried:
set DestMovie to make new movie with properties {data rate:SourceRate, video depth:24, high quality:true} -- I also tried video depth:0
paste
I also try:
tell movie 1
paste given video depth:24 -- I've also tried just paste
end tell
and still it converts my images to thousands. The image gets to photoshop perfectly. If I paste it into a Pages document the image depth is correct. I have tried both RGB and CMYK in 8 and 16 bit depths in Photoshop. If I save the file as JPEG in high quality mode and then open the file with Quicktime and copy and paste it, it works great, the only problem is I then have to make a new file for every image I process because if I close the file, QuickTime keeps it open so Photoshop can't then save to the same file.....
Will someone please help me figure out how to keep my image quality on pasting into Quicktime???
Thanks
Powerbook G4 Mac OS X (10.4.9)I open my original movie in Quicktime. I make a new movie in Quicktime for the modified images to be pasted into.
I copy the current frame from my source movie and paste it into Photoshop. I do my image processing and then save as a jpeg high quality and close my file (which strips out the audio from a muxed mpeg-1 file) then reopen the file in Photoshop. Now I have a good quality image in Photoshop. I have been using RGB 8 bit as my mode in Photoshop. I only tried CMYK to see if it would work better. It was exactly the same.
I then do a select all and copy in Photoshop, then go to Quicktime and do a paste. This is when it gets converted to 16 bit depth. If I do the same exact sequence and paste into a Pages document the image stays 24 bit, so I am pretty sure it is something in Quicktime.
Again, if I save the file in Photoshop and then open the same file in Quicktime, copy the image and then paste it into my destination movie, it works great. The only problem with this method is I have 15 minutes of video to process with is 27,000 jpeg files in the end. I prefer to use one file if I can. The reason for the 27,000 files is that when I open an image in Quicktime and paste it into a movie, it saves it as a track in the movie and even when I close the original file, Quicktime keeps it as in use. When I look at the movie properties, it keeps the original file in the list until I do a save as movie and it flattens the movie. If I flatten the movie once, then when I do another save, it keeps the original file open again. I would have to do a save as movie... again 27,000 movie files now. Geez...
Thanks! -
Best way to combine 8-bit and 16-bit image files?
I produce large photographic art prints by combining my own edited 16-bit RAW photo images with 8-bit stock photo images and 8-bit photoshop artwork. I used to just reduce my 16-bit photos to 8-bit and then edit my composite image as 8-bit, but I ran into banding and other problems in the color gradients I created later in my composite image.
I want my composite image to be 16-bit to get more accurate colors and better gradients. What is the best way to bring 8-bit image files into my composition and maintain best quality? Is it good to convert 8-bit images to 16-bit in PS before importing? I also heard about bringing 8-bit images in as Smart Objects? Thanks for any help on this.*Photonic wrote:
Thanks Jack and Noel. My workflow usually starts w. a 16-bit RAW image brought into Photoshop as the background layer of the master file. Color space is AdobeRGB. Then 8-bit stock photo and art elements (objects) are brought in by dragging the open 8-bit image up to the master image file tab, and then dropping it back into the image window after the file opens.
Should I use the "Paste In" command instead? I usually avoid copy/paste since some of my element files are usually over 100MB and that seems to challenge my Mac after a while.
Could I convert the 8-bit image files prior to import, like Noel suggests (Image>Mode>16bits)? Thanks.
There is no need to convert 8bit open documents to 16bit mode Photoshop will convert the copied layers to 16bit bit during the drag copy. Converting the open document would just increase Photoshop RAM usage every layer pixels bytes used would double in size.
If you element files are over 100MB they are most likely layered files. If all you need is a composite you should avoid using Place for that will needlessly inflate your document size. Instead open the element file create a new layer that is a stamp visible layer (Shift+Alt|Opt+Ctrl|Cmd+E) and drag that layer to you document then close nosave your element file. Copy only copies the targeted layer or there is a Copy Merge that copies the composit merge of all targeted layers. It a bit hard to create an action that would be able to use Copy or Copy Merge. Using the above stamp visible way can be made into an action. You also do not want to drag all the layers to your document if you just need a composit layer.
You could also automate the element file copy with an action.
Action Step 1 Insert menu into File>Open this will be an interactive step you must select a file to open. When the action is played.
Step 2 (Shift+Alt|Opt+Ctrl|Cmd+N) Create a new empty layer This will always work
Step 3 (Shift+Alt|Opt+Ctrl|Cmd+E) stamp visible layers into the new layer
Step 4 (Ctrl|Cmd+A) select all
Step 5 (Ctrl|Cmd+C) Copy
Step 6 Close current document no save
Step 7 (Ctrl|Cmd+P) Paste into the document your working on Photoshop will convert to 16bit if the document is 16bit mode and the clipboard content is 8bit.
When you use Photoshop and do something. Think to yourself how did Photoshop do what you asked it to do. Thing about what is involved what layers must be used etc. How is the feature/function done.
Message was edited by: JJMack
Message was edited by: JJMack -
What happens to a 12-bit image in LabVIEW/IMAQ Vision?
I'm using the DALSA DALSTAR 1M30 camera, and we are building a cable for it, and have not yet got it up and running, but I am already programming our application for it. I was wondering, since the IMAQ Vision VI's seem to pertain to 8-bit, 16-bit, and floating point images, I was wondering if they will work fine with a 12-bit image like the one from the 1M30 camera. I was also wondering, if they do work fine, what format the output of a VI like IMAQ ImageToArray will be. Will the 12-bit pixel values be converted into 16-bit?
Thanks for the help.A 12 bit image is stored within IMAQ as a 16 bit image. Only routines that accept 16 bit images can be used for manipulating the image.
The IMAQ WindDraw converts 16 bit images to 8 bit images for display, using the selected method. You can also manually convert to an 8 bit image for automatic thresholding and other routines that don't accept 16 bit images. For most applications, you will want to shift it 4 bits during conversion so the most significant bits are preserved.
Bruce
Bruce Ammons
Ammons Engineering -
How to convert color image(24 bit) YUV 4:2:2 to gray scale 8 bit image
I am using sony DFW-X700 color camera for one of vision applications.Does NI Compact Vision System(CVS) support YUV 4:2:2 format(8 bit each).I want to do gray scale processing, so i need to convert the YUV color into gray scale (8-bit) in the software(like Labview). Please suggest us how to do this conversion for better gray scale image clarity from color.
In YUV color space, Y represents the gray scale; in RGB color space, R=G=B represents gray scale. You can simply set R=G=B=Y, to convert YUV to RGB. If the original color depth is 24 bit, then the result is 24 bit too.
You can create gray scale color table like this:
array size = 256;
[0] = 0x000000;
[1] = 0x010101;
[2] = 0x020202;
[255] = 0xFFFFFF;
To convert 24 bit gray scale to 8 bit, check every pixel in 24 bit image to find the array index according to the color table, and replace the pixel with array index.
George Zou
http://gtoolbox.yeah.net
George Zou
http://webspace.webring.com/people/og/gtoolbox -
I have a pixelink camera that when I run through the IMAQdx vi's, it produces a BW image. When I view the image, I can select from the palette bar when I right click on the image out display and select rainbow, temperature, etc....but I can't save these colored images. I'm guessing that the image out viewer converts the U8 image into a RGB image for display. I would expect that there would of been a VI (or maybe there is and I haven't seen it) that would do this task and allow you to save the image as a RGB. Is there a VI to do this?
Thanks,
guilio_2008Do you have the NI Vision Development Module? If so, this sloppy little bit of code will let you change an image palette on the fly, then save out a copy of the color image you see. You can also choose a user defined palette and create your own palette with the color ramp next to the window.
-root
Message Edited by Root Canal on 05-05-2009 11:11 AM
global variables make robots angry
Attachments:
happy colors.vi 67 KB
forbidden planet.png 629 KB
happy colors.PNG 211 KB -
How do I Convert a Tiff image to a jpeg without being FORCED to 8-bit Color?
I am an Artist. I have High quality TIFF images. When I convert the tiffs to jpeg it forces me into 8-bit color automatically. (Forget about 32bit - it will not allow me to jpeg that at all) The only way I can get back to 16bit color is to use the already SMAshed file and bring it up to 16bit. THIS makes NO sense. Once the jpeg is smashed, HOw in the world is it supposed to convert up again. ?? Then even though it says you converted the file to 16 -bit , the metadata refers still to the file as 8-bit.
On top of all of that confusion, One picture, for example, when supposedly converted to 16bit, gets much BRighter then even the original Tiff image. It looks good on one hand and over exposed on the other. I assume that is photoshop throwing in fake resolution, am I right?
Am I wasting my time with this imaginary 16bit conversion?
Is there ANY way to take that original Tiff image and convert it to 16bit jpeg without the Default 8bit? I have been trying all kinds of things. I even have asked my web guy. My web guy says that 8-bit is unexceptable for printing, even for web.
Could this have anything to do with my computer and scanner?
I have the iMAC OS X 10.8.3 (3.2 GHz) 8 GB memory.
And I also have an Epson Expression 10000XL graphic arts scanner capable of scanniing at 48bit color.
This color stuff Really matters! It MATTERS! I HAve FINE art files. I am already losing so much quality with the jpeg conversion. (which I am required to do for SmugMug, in addition to compressing all my files to 50mb or Under)
Anyone who knows anything that could help me would be much appreciated.
Aloha,
-MelissaFirst of all jpeg is 8 bit only there is no way to save as a 16 or 32 bit jpg, just does not exist. Secondly people print in 8 bit all the time and most if not all web graphics are in 8 bit as that is the only way to view it as there is no 16 bit or 32 bit monitors to view it. All but a few pro monitors are 8 bit monitors.
If you care about the color gamut and want the full range of color that 16 and 32 bit provide, then why jpg? Jpg by its own nature throws out color just to compress, thats why it is popular on the web, because of its small file size not its quality. If you need 16 or 32 bit for anything it must be in a format that supports that color depth.
That being said a jpg image at 8 bit will display 16+ million colors, 256 shades of red, 256 shades of green and 256 shades of blue.
Now here is where I think your bit information is off. a jpg image is a 24 bit image that will produce 8 bits of red, 8 bits of green and 8 bits of blue.
The 8, 16 and 32 are per channel not total color information.
If the overall image was 8 bits, the image would be gayscale. -
How to convert for 1 bit image
dir sir;
i want to make a programe by it i want to upload image real image and then it converted it for 1 bit image ;
can i use java to do that?
and if soo what method and package and function helps me to do that .
if you can provide me with simple code i will be thankfull.
beast regards.Try using the IMAQ Cast Image function under Motion & Vision>>Vision Utilities>>Image Management>>IMAQ Cast Image.
Regards,
Steve -
Using IMAQ Cast Image to convert 16 bit to 8 bit image.
I am trying to convert a 16 bit image to a bit image, and I am using IMAQ Cast Image. I am wondering what I am supposed to wire into the # of shifts? When I use NI Vision Assistant it asks I can convert by the adjust dynamic method. Does anyone know how to do this with IMAQ Cast Image? Thank you in advance.
The number of shifts is the number of bits that will be chopped (in the dark regions) from the initial image to fit into 8 bits.
For instance, if you have a 10 bit image, compressing into an 8 bit image will obviously introduce some losses. You can decide to loose information either in the "whithe" parts or in the "black" parts of the image.
With #shifts = 0, the two most significant bits will be lost, so the whitest parts of the image will be uniformely white, but the darl grey levels will be preserved.
With #shifts = 2, the two least significant bits will be lost, preversing the whitest parts grey variations, but losing the subtilities in the darkest parts.
With #shifts = 1, a single bit is lost on either sides...
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left... -
HOW TO CONVERT RAW FILES TO JPEG RGB 8 BIT in iphoto
Can someone please tell me how to convert RAW files to jpeg RGB 8 bit in iphoto on an iMac?
How are you trying to "export to Mypics"? The only way to get a Raw out of iPhoto is to export with the Kind set to Original.
Regards
TD -
How do I convert a 14 bit image to an 8 bit image in Elements 3 ?
One person had mentioned to me that after scanning, they would do some basic color/highlight/shadow changes in Elements, in 14 bit and then change it to 8 bit to do any further editing. How do I go about converting a 14 image to 8 bit?
ThanksUnder the menu Image>Mode there will be an option to convert to 8 bits per
channel. -
I want to convert pictures to 1 bit image
dir sir;
i want to make a programe by it i want to upload image real image and then it converted it for 1 bit image ;
can i use java to do that?
and if soo what method and package and function helps me to do that .
if you can provide me with simple code i will be thankfull.
beast regards.Hi,
if you have vision, you could use the functin IMAQ Image to Array to have a 2D array of the pixel values.
You can then compare pixel by pixel; if your images come from a camera, I would recommend to set a treshold of acceptance.
This is a time consuming solution anyway.
Alternative methods:
1) Make a subtraction of the two images, the resulting image will be the difference of them
2 ) Use IMAQ LogDiff function (operators palette)
3) Calculate the histogram of both image and compare the histogram reports
Good luck,
Alberto
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