Color images randomly converting to B/W ?

While working in LR 4, after several hundred edits for no reason it started converting the images to B/W? Seems to be some sort of glitch, they are color then change to B/W? Thanks for any help with this.

Select the B&W image and in the Develop Module / History panel go back to one step before "Convert to Black and White".
Or, if you just hit the V-key, immediately after you can press Ctrl / Cmd + Z to undo the latest step.

Similar Messages

Convert color images to black&white bitmaps

Hi,
I have black&white scans of public domain books (image format). I use an OCR software to convert them to indexable PDFs (image+text format). However, the OCRed PDFs are insanely big: a 27 MB scanned PDF leads to an indexable PDF of 728 MB! And unfortunately, my OCR software doesn't have output settings, so I have to find a way to compress the files using Adobe Acrobat 9 Pro.
Using Advanced Options > Optimization does reduce the file size, but not significantly. The problem seems to be that my OCR software converts the black&white scans to color images, and encodes them as such inside the PDF. So I need a way to set the image modes back to black&white. I tried using the Advanced Options > Preflight dialog, and selecting "Convert to black&white". However, the resulting PDFs stay about the same size! It seems that "Convert to black&white" converts the images to grayscale, instead of to bitmap.
Any help would be appreciated!

I mentioned "bitmaps", because when I open the original PDF and right-click a random page and select "Modify image..." and open the image in Photoshop, the mode is set to "Bitmap mode": meaning 1-bit mode, containing either black or white pixels. However, when I do "Modify image..." for the OCRed PDF, the mode is set to "RGB Color Mode". I think this explains, in part, the huge size of the OCRed PDF.
Maybe this table will make it more clear:
Original PDF (Bitmap Mode, 132 dpi)
Size: 27 MB
OCRed PDF (RGB Color Mode, 300 dpi)
Size: 728 MB
Now, from the table above, it's clear that I have to reduce the image resolution. So, using the Acrobat's PDF optimizer, I tried the following settings:
Optimized OCRed PDF: Try 1 (Downsample to 132 dpi, JPEG compression)
Size: 733 MB
Optimized OCRed PDF: Try 2 (Downsample to 132 dpi, ZIP compression)
Size: 449 MB
But 449 MB is still huge for a single book. And I don't want to reduce the resolution under 132 dpi, because I will loose quality. Clearly, if the original document is just 27 MB, I should be able to squeeze the OCRed document too. But I don't know how.

How to use a grayscale color model in converting a colored image

how to convert a colored image into grayscale using :
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
int bits[] = new int[] {8};
ColorModel cm = new ComponentColorModel(cs, bits, false, false,
Transparency.OPAQUE,
DataBuffer.TYPE_BYTE);
please only this method , i don't need the "bandcombine" method cause i need to know that i have exact 256 grayscale colors, thanx in advance.

I went into mail preferences in the first place. I found the fonts and colors and picked the color I want but it doesn;t seem to be sticking?

Convert grayscale to colored images

Hi
I am stuck with my program.
BufferedImage gray = new BufferedImage(bi.getWidth(), bi.getHeight(), BufferedImage.TYPE_BYTE_GRAY);
Graphics g = gray.getGraphics();
g.drawImage(bi, 0, 0, null);
g.dispose();using the above code, i have converted a colored image to a grayscale image.
now my problem is, i want to convert that grayscale image back to colored.
is there any way to do so?
please help
thanks

I am no expert in this, but I believe that when you lose the color information, it is lost forever never to be retrieved, that the basic premise of your program is incorrect. So, perhaps you can store information on what "filters" were applied (I'm not familiar with this "filter" concept) and in what order, and then after you have completed all the gray image processing, apply these filters to the stored colored image and then save it.

Do images imported to Keynote retain their previous color profile? In other words, if the Keynote presentation will be shown using an sRGB profile projector, should the images be converted to sRGB prior to importing?

Do images imported to Keynote retain their previous color profile? In other words, if the Keynote presentation will be shown using an sRGB profile projector, should the images be converted to sRGB prior to importing or can they be batch adjusted in Keynote?

While I feel your comment doesn't directly address my question, why I am worrying is this.
This presentation is to a camera club. Color is important. Images shown in meetings are projected by an sRGB color profile projector. Most serious photographers us a color profile with a bigger space than sRGB (typically RGB1998). If you project an RGB1998 image on an sRGB projector the colors go to crap. More precisely they become dull and lifeless. Thus, I am trying to determine whether I need to convert the images I plan to put into my Keynote to sRGB and boost the saturation PRIOR to importing them or whether Keynote has a way to do this as part of the software.
Jerry

How do I convert color image to color vector?

Hi,
Im fairly new/not very well versed in Illustrator, I was wondering if you guys could help me with instructions or tips how to convert old alphabet art to color and actualy converting color images like drawings to vector . Ive tried image trace but it turns the image black and white and with really rough strokes.
Thank you!

Is this art in the Public Domain? Or, do you have the copyright owner's permission to use it in your work? If the answer to both of these questions is no, then you should not be using it.
That being said, I got good results with image trace (using the High Fidelity Photo preset) even on the low-res image you attached here. You just have to adjust the preferences after you do the trace.

How to convert a jpeg file into a 1-bit bmp file (2 colors image)

Hi. I�m having serious problems to convert a jpeg file into a 1-bit bmp file (2 colors image).
I�m using FileSaver.saveAsBmp(String t) but what i get is a bmp image, but with 16M colors, but what i want is a 2 colors bmp file. A black and white image.
Does anybody know how to do this? I�m really getting crazy with ths problem.
Thanks in advance

Hi opalo,
this code may help you...
import java.awt.*;
import java.io.*;
import java.awt.image.*;
import javax.imageio.ImageIO;
class Write1 extends Component {
//--- Private constants
private final static int BITMAPFILEHEADER_SIZE = 14;
private final static int BITMAPINFOHEADER_SIZE = 40;
//--- Private variable declaration
//--- Bitmap file header
private byte bitmapFileHeader [] = new byte [14];
private byte bfType [] = {'B', 'M'};
private int bfSize = 0;
private int bfReserved1 = 0;
private int bfReserved2 = 0;
private int bfOffBits = BITMAPFILEHEADER_SIZE + BITMAPINFOHEADER_SIZE;
//--- Bitmap info header
private byte bitmapInfoHeader [] = new byte [40];
private int biSize = BITMAPINFOHEADER_SIZE;
private int biWidth = 50;
private int biHeight = 70;
private int biPlanes = 1;
//private int biBitCount = 24;
private int biBitCount = 1;
private int biCompression = 0;
private int biSizeImage = 0x030000;
private int biXPelsPerMeter = 0x0;
private int biYPelsPerMeter = 0x0;
private int biClrUsed = 0;
private int biClrImportant = 0;
//--- Bitmap raw data
private int bitmap [];
//--- File section
private FileOutputStream fo;
//--- Default constructor
public Write1() {
public void saveBitmap (String parFilename, Image parImage, int
parWidth, int parHeight) {
try {
fo = new FileOutputStream (parFilename);
save (parImage, parWidth, parHeight);
fo.close ();
catch (Exception saveEx) {
saveEx.printStackTrace ();
* The saveMethod is the main method of the process. This method
* will call the convertImage method to convert the memory image to
* a byte array; method writeBitmapFileHeader creates and writes
* the bitmap file header; writeBitmapInfoHeader creates the
* information header; and writeBitmap writes the image.
private void save (Image parImage, int parWidth, int parHeight) {
try {
convertImage (parImage, parWidth, parHeight);
writeBitmapFileHeader ();
writeBitmapInfoHeader ();
writeBitmap ();
catch (Exception saveEx) {
saveEx.printStackTrace ();
* convertImage converts the memory image to the bitmap format (BRG).
* It also computes some information for the bitmap info header.
private boolean convertImage (Image parImage, int parWidth, int parHeight) {
int pad;
bitmap = new int [parWidth * parHeight];
PixelGrabber pg = new PixelGrabber (parImage, 0, 0, parWidth, parHeight,
bitmap, 0, parWidth);
try {
pg.grabPixels ();
catch (InterruptedException e) {
e.printStackTrace ();
return (false);
pad = (4 - ((parWidth * 3) % 4)) * parHeight;
biSizeImage = ((parWidth * parHeight) * 3) + pad;
bfSize = biSizeImage + BITMAPFILEHEADER_SIZE +
BITMAPINFOHEADER_SIZE;
biWidth = parWidth;
biHeight = parHeight;
return (true);
* writeBitmap converts the image returned from the pixel grabber to
* the format required. Remember: scan lines are inverted in
* a bitmap file!
* Each scan line must be padded to an even 4-byte boundary.
private void writeBitmap () {
int size;
int value;
int j;
int i;
int rowCount;
int rowIndex;
int lastRowIndex;
int pad;
int padCount;
byte rgb [] = new byte [3];
size = (biWidth * biHeight) - 1;
pad = 4 - ((biWidth * 3) % 4);
if (pad == 4) // <==== Bug correction
pad = 0; // <==== Bug correction
rowCount = 1;
padCount = 0;
rowIndex = size - biWidth;
lastRowIndex = rowIndex;
try {
for (j = 0; j < size; j++) {
value = bitmap [rowIndex];
rgb [0] = (byte) (value & 0xFF);
rgb [1] = (byte) ((value >> 8) & 0xFF);
rgb [2] = (byte) ((value >> 16) & 0xFF);
fo.write (rgb);
if (rowCount == biWidth) {
padCount += pad;
for (i = 1; i <= pad; i++) {
fo.write (0x00);
int b = 1200;
fo.write(b);
rowCount = 1;
rowIndex = lastRowIndex - biWidth;
lastRowIndex = rowIndex;
else
rowCount++;
rowIndex++;
//--- Update the size of the file
bfSize += padCount - pad;
biSizeImage += padCount - pad;
catch (Exception wb) {
wb.printStackTrace ();
* writeBitmapFileHeader writes the bitmap file header to the file.
private void writeBitmapFileHeader () {
try {
fo.write (bfType);
fo.write (intToDWord (bfSize));
fo.write (intToWord (bfReserved1));
fo.write (intToWord (bfReserved2));
fo.write (intToDWord (bfOffBits));
catch (Exception wbfh) {
wbfh.printStackTrace ();
* writeBitmapInfoHeader writes the bitmap information header
* to the file.
private void writeBitmapInfoHeader () {
try {
fo.write (intToDWord (biSize));
fo.write (intToDWord (biWidth));
fo.write (intToDWord (biHeight));
fo.write (intToWord (biPlanes));
fo.write (intToWord (biBitCount));
fo.write (intToDWord (biCompression));
fo.write (intToDWord (biSizeImage));
fo.write (intToDWord (biXPelsPerMeter));
fo.write (intToDWord (biYPelsPerMeter));
fo.write (intToDWord (biClrUsed));
fo.write (intToDWord (biClrImportant));
// DataOutputStream temp = new DataOutputStream(fo);
// int m = 32;
// temp.writeInt(m);
catch (Exception wbih) {
wbih.printStackTrace ();
* intToWord converts an int to a word, where the return
* value is stored in a 2-byte array.
private byte [] intToWord (int parValue) {
byte retValue [] = new byte [2];
retValue [0] = (byte) (parValue & 0x00FF);
retValue [1] = (byte) ((parValue >> 8) & 0x00FF);
return (retValue);
* intToDWord converts an int to a double word, where the return
* value is stored in a 4-byte array.
private byte [] intToDWord (int parValue) {
byte retValue [] = new byte [4];
retValue [0] = (byte) (parValue & 0x00FF);
retValue [1] = (byte) ((parValue >> 8) & 0x000000FF);
retValue [2] = (byte) ((parValue >> 16) & 0x000000FF);
retValue [3] = (byte) ((parValue >> 24) & 0x000000FF);
return (retValue);
class Writebmp
     public static void main(String args[])
          //Image img = Toolkit.getDefaultToolkit().getImage("jatin.bmp");
          try
          File filename = new File("jatin_test.bmp");
          BufferedImage image = ImageIO.read(filename);
          Graphics graphics = image.getGraphics();
          graphics.drawString("उजगर",10,30);
          Write1 w = new Write1();
          Image img = Toolkit.getDefaultToolkit().getImage("jatin_test.bmp");
          w.saveBitmap("jatin_test.bmp",img,200,200);
          catch (IOException e)
System.err.println ("Unable to write to file");
System.exit(-1);
}

Convert a jpeg file into a 1-bit bmp file (2 colors image).

Hi. I�m having serious problems to convert a jpeg file into a 1-bit bmp file (2 colors image).
First, i,ve tried to get a 1-bit jpeg. But i think this is not possible, so what i have to do is to get a 1-bit bpm file.
I�m using FileSaver.saveAsBmp(String destination) and what i get is a bmp image, but with 16M colors, but what i want is a 2 colors bmp file. A black and white image.
Does anybody know how to do this? I�m really getting crazy with ths problem.
Thanks in advance

You better read this at
http://forum.java.sun.com/thread.jspa?forumID=57&threadID=733738

Problem using IMAQ Array to Color Image vi

I am doing some pixel manipulation & while going from an image to an Image Pixels (U64) array using IMAQ Color Image to Array VI I cannot see the image once it is modified.
I am...
1) converting the image to the 64 bit pixel data using IMAQ ColorImage to Array.vi
2) doing the manipulation
3) converting back to an image using the IMAQ Array to ColorImage.vi using the 64 bit input.
What I get is...
1) a black image with data behind it... meaning... if I take the magnifier tool and go to the approximate locations of my image where I expect to find the manipulated data, it is there.
2) cast that image to a 32 bit image & still get a black image for the output. The data however is no longer there and appears to have been stripped.
3) no error's out of any VI's...
TIA

With Vision 2009 situation is not better.
It happened because U64 image displayed in full scale. So, if you have full range of intensities (from 0 to 65535), then you can see something. But if your intensities in small range, for example, 0...255 in all channels, then you will see black image.
Feel differences:
It should be possible to map U16 values into U8 display range with given range (like IMAQ WindDisplay Mapping does), but right now this feature available for I16 images only, not for U64. What you can do is following - map each channel to U8 (with linear LUT, for example), put channels together, then display 32 bit RGB instead of U64.
Andrey.

Bridge displays color images as b&w

I assume this has something to do with settings in Bridge CS4, my platform is MacBook Pro OS 6.8.10.
This question might confuse some people. To beging with, I do shoot my images in RAW files, I even have Bridge convert them to DNG files.
Upon download the images are displayed in color as they should be for RAW files. After editing images in Camera RAW, I convert most all images to sRGB. When some of those edited images come back to Bridge, they might be presented in B&W, though no color is lost to the file upon displaying in Photoshop, and I did not edit the file to be a B&W image. I have DNG, Canon RAW, Tif and Jpeg files, and most of these are displayed in color, but some are not, and I have not figured out the missing link just yet. So to be clear, I have Jpeg color images, displaying as b&w images, but they are color images. Only b&w images should be displayed as b&w.
This problems started once I learned I could edit one image in photoshop out of a series of images, then after editing, i could bring the single photo file back to bridge, and then copy/paste image settings onto a groups of images in Bridge, and all those images would then have the same adjustments made to them as a batch edit adjustment.
But now sometimes I get a B&W display on some images even when I do not apply a Bridge settings edits, and when I never edited the image for a B&W display. I has to a setting somewhere in Bridge, and I just have not figured it out yet.
Thanks in advance for all suggestions:

ssprengel wrote:
Yammer asked a pertinent question that remains unanswered—is that “settings” badge (small lines-triangles-in-a-circle) shown on the B/W image thumbnails (at least). If you’re not sure, then include a screenshot of a few Bridge thumbnails where some are color and some are B/W, using the little camera icon on the web version of the forum messages.
And the answer is NO!. I only have those showing up associated with the .DNG files (Camera RAW)
Another similar question would be if you see a B/W thumbnail in Bridge, try doing a right-click (or whatever the Mac equivalent is) and choose Open in Camera Raw. Is the image in B/W or color in Camera Raw.
A <Control Click> (on MAC), opens the .jpeg file in b&w, as shown in the thumbnail.
Can you upload three versions of one of the images that display as B/W: the original PSD/raw/TIF file, a normal Save As JPG that is in color, and a Save For Web JPG that is B/W? Use something like http://www.dropbox.com/ and post a public download link to the images, here.
NO, I thought I explained that real well. Only the .jpeg file that was saved through the "Save for Web" processing ( that is, the a jpeg the goes through greater compression to reduce image file size for web display), is the image file process that produces the b&w thumbnail in Bridge ONLY. All opened images, of various file formats (ie: DNG, Psd, Tif, Jpeg, & Jpeg for Web), all present Color presentations (for editing in Photoshop, and or in display browsers). It is only the thumbnail of that particular jpeg formatting processing for Web Images that produces the b&w image "THUMBNAIL" in Bridge.
When you Save As JPG or For Web, are you ever overwriting the original image with a new one or do you always save the PS-edited image with a new name?
No, never. I leave my RAW files, as RAW originals, and work on newly names images files.
A theory about what is happening is that Bridge uses Camera Raw to generate its thumbnails, and the images that are B/W have some embedded Camera Raw setting, perhaps pasted from a different filetype, that makes CR think the image should be rendered as B/W, but when you open the images on Photoshop, you are opening them directly, without using the Camera Raw plug-in, so any embedded settings are ignored, and the image displays in its original state without the settings having been applied.
It makes since, (what you are saying), and it certainly does respond in that fashion. Your suggestion to open Ctrl Click, or Right Click to open the thumbnail in Camera RAW, was an interesting test, and the response was to open the previously save color image with a b&w thumbnail, into Camera RAW as a b&w image. So Camera RAW is responding to what is in the xmp settings that describes this images thumbnail to be displayed b&w. It is weird that a browser does not.
As to what is in the window selections for the "Save for Web" editing windows, Presets for jpeg are :
Progressive
Optimize
Embed Color Profile
And I use Embed Color Profile.
Even the Preview button at the bottom of the window, shows the color image as displaying color.
I vaguely remember about a year ago doing some CS 4 Photoshop and Bridge web tutorials from an unnamed tutoring website and guy named D_k_ . It is his fault. Just kidding, I actually enjoy those tutorial.
**** Okay, this is perhaps originating from Camera RAW presets, where you can apply previously made settings to other images and then saved them as Presets. Though I don't have this checked in Camera RAW ( still something goofy is going on there), I did find that in Bridge I can reset the individual "saved for Web" image thumbnail back to the the color image by :
Right Click (Ctrl Click, MAC) on the thumbnail
menu down to the "Development Settings" and select :
"Previous Conversion", and this presents the color thumbnail.
I have now tested all the Camera RAW settings in Camera RAW, by opening an image in each one of these :
Image Settings
Camera RAW Defaults
Previous Conversion
Custom Settings
and then reducing image file size, and saving for the web, while changing file name, and each and every one of these Settings produces a Sepia Toned thumbnail. I found out the images were a subtle Sepia Toned image by enlarging the Bridge Thumbnails bigger for a better view. So I can correct the thumbnail after it has been created, but so far, I can't get the thumbnail to be correct on first creation of the web saved jpeg image file. Regular jpeg image file thumbnails save correctly.

IMAQ FFT of a color image

In LABVIEW 2011 Is there a way to do an IMAQ FFT on a color image? The only thing that seems to work is on gray scale images. When I try to use a color RGB(U32) image, the FFT vi errors out with "Invalid ImageType".
Any suggestions?
Thanks in advance.
Solved!
Go to Solution.
Attachments:
Resolution Decrease.vi ‏46 KB

Thank you for the prompt reply Daniel.
What we are attempting is a de-resolution of a hi resolution image to simulate what a 1-4 reduction in resolution using a fiber optic taper will look like to a customer without having to built a very expensive actual optical system. If it proves to be an acceptable resolution, then we can move forward. The point is we need a fiberoptic imaging system due to environmental issues prevernting having an actual camera up close to the work being inspected.
So the idea is to convert the image to an FFT, remove any frequency component above the resolution we would see through the optical magnification, then recreate the image via a reverse FFT. Does that sound feasible or is there a simpler method of simulating a lowering of the resolution of an image? We can work on the gray scale image, as I believe this will prove acceptable for our demonstration. If color is required, we can talk about splitting up the color planes.
Warm regards,
Randy

Preserving Black color values when converting color PDF to grayscale

I opened a full colored PDF document (exported from InDesign using Profile: Euroscale Coated v2) in Photoshop and tried to convert it to grayscale (image > mode > grayscale) and noticed that the black color values changed. text for example that was 100% black in the PDF document became a screen of 91% black.
is there a way to preserve color values when converting full color PDF documents to grayscale?
or in other words WHICH is the correct way to convert full color PDF documents or full color InDesign files to grayscale?
I am using Adobe CS 3, Acrobat 8 Professional, on Mac OS 10.5.5

Before you open the PDF in Photoshop, set PS's Color Settings to Photoshop 5 Default Spaces. When you open the PDF set the Mode to Grayscale in the Import dialog. Just remember to reset your color settings when you're done.
Edit: Also, if you want to match black percentages as well as 100% black, set the Photoshop Color Settings to Photoshop 5 Default Spaces with the Gray working space to Dot Gain 20%.

How can i compare two color images in vision builder for AI?

What i want to do is to compare two images. I have a base color image that represents the desired colors and tones. I have another image to be compared to the base image. What i want to do is to compare this two images to know how close they are regarding contents of color and tones. In other words, i want to know how close is image 2 to image 1 (base sample)....
I would like to know how to get the content of certain colors in an image and then compare this values with the same values from another image.
For example..i have two sheets of paper that contain various mixed colors...i want to know the amount of green, red an blue in each image and then comapre this values.
What i want to do is to compare difer
ent samples of fabrics. this fabrics must be of a specified color...but due to the process they may vary in tone or even color...so i want to compare this fabrics to a amster sample to see how close they are in color and tone..
Anything would help since i dont have experience in this type of comparisons...thanks

VBAI allows you to work with grayscale images only. You can acquire an image, use the vision assistant to convert it grayscale by extracting the luminance plane (or any of the other color planes) and then analyze the resulting grayscale image. To do what you are talking about, though, it would really be better to get Vision for labview. You could then take color images, compare color plains, use statistical functions to determine average color values, and so on.

Color setting and convert to profile

i found that when i use the "convert to profile" to convert my image, the "intent" setting in Color Settings will affect the image conversion.
That means the "conversion options" in color setting will overwrite/affect the same "conversion options" in convert to profile, is it a bug or is true?
i am using PS CS6 v13.0.5.

hi Pfaffenbichler,
thanks for your reply,
i am not sure is it a bug, maybe that is normal, but i have a question is:
When i convert an image from LAB to CMYK color mode using "Convert to Profile" function
If convert to profile > conversion options > intent: Relative Colorimetric, but color setting > conversion options > intent: Absolute Colorimetric
the result is different with LAB value
If convert to profile > conversion options > intent: Relative Colorimetric, but color setting > conversion options > intent: Relative Colorimetric
As far as i know, the result of LAB should be same. It is because i think color setting will not affect the conversion.
i made a pdf for your reference, hope you know what i want to explain.
Many thanks.
Regards,
Ming-yiu CHEUNG
Deputy Manager

Export Problem with Color Image Washing Out

I did an export of an image from DNG to JPG in LR4. Funny thing is, the JPG suddenly appears with a washed out look. It looks the same in Develop and Print modules also.
It gets even funnier, because when I use Finder to check the photo, the preview of the image is fine. I also opened the image from Finder in Photoshop CS5 and it is fine there. I also opened the image in PSCS5 from LR4 with "Edit In" and again the image in Photoshop is fine. So this appears to be a view issue in LR4. I did not print out the washed out photo but I suspect it would print out as it appears in LR4.
I've done some other image exports from DNG to JPG with other images and they do not have this problem but those were black&white converted images. However, I did check doing an export of another color image with the same result as the problem image. Here are screen captures of the DNG and the exported JPG (I was going to upload the exported JPG, but like I said it appears fine in Finder):

My monitor calibration is just fine. I was saying that because similar
problems are almost always due to bad monitor profiles. If you calibrate
regularly using hardware calibration then you're probably fine. Many people
use canned profiles from monitor manufacturers however and lightroom is
highly sensitive to those and shows messed up color depending on the
source. In this case however, since the restart fixed it it was likely a
bad preview image. I have seen before that LR sometimes is lazy in
refreshing those and can show you strange results that only get cleared up
by forcing a preview refresh.
Last your top screenshot DOES show that you are pushing the red in that
dress out of the monitor gamut. You can check this in the soft proof in LR
4 by turning on the monitor gamut warning. If you blow the color out of the
monitor gamut the preview is no going to be accurate no matter how good
your calibration. Just a cautionary warning.
Sent from my iPhone

Color images randomly converting to B/W ?

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