Can I change the bit depth on images in pdf files?

I have a lot of pdf files that were scanned in 24 bit colour. I'd like to convert some of them to greyscale or black and white, and reduce the resolution to make them smaller.
I can see how to reduce the resolution with Save As Other/Optimized PDF, but there are no options there to reduce bit depth. Is there any way to do this?

Thanks, I think I've worked out how to use them. I found a fixup called "Convert color to B/W", but it seems to convert to greyscale, not black and white.
I found this page describing how to convert to both greyscale and monochrome. It says the only way to do monochrome is to convert to tiff first:
http://blogs.adobe.com/acrolaw/2009/10/converting-color-pdf-to-greyscale-pdf-an-update/
If that's the case then Acrobat Pro isn't going to help me, but that was written in 2009. Does anyone know if true black and white conversion has been made available since then?

Similar Messages

How do I reduce the bit depth of images to 1-bit within Acrobat 9?

I am hoping a simple solution exists within Acrobat 9 for reducing the bit-depth of images to 1-bit.
I know of two methods that both seem more like workarounds. One, edit the image using Photoshop. Two, without Photoshop, export the page as a 1-bit PNG and recreate the page in Acrobat. It seems like one of the preflight fixups should be able to get it done with the right settings. But, it's a labyrinth of unfamiliarity.

There's no predefined 1-bit conversion in Preflight because it doesn't make sense. Preflight will not dither bitmaps, so most images will become black squares. Extreme color conversion is only intended for text/vector objects.
If you want to try it anyway, you can create a custom Fixup if you have a 1-bit ICC profile.
Preflight > Single Fixups
Options menu > Create new Preflight Fixup
Name it something like "Convert all to 1-bit BW"
Search for "Convert colors" in the type of fixup box and add it
Destination tab > Destination > your ICC profile for 1-bit black
Uncheck "use destination from Output Intent"
Keep everything else as default, though I'd suggest using "Embed as output intent for PDF/X" if you're making PDF/X documents
Conversion Settings tab > All Objects + Any Color (except spot) + Convert to destination + Use rendering intent
Press the + key to duplicate this step, and change the second copy to "Spot Color(s)"
Press + again and change the third copy to "Registration color"
Save the fixup and run it.
In case you don't have a 1-bit ICC profile installed, I've attached one.

How can I change the page size of a scanned PDF document?

How can I change the page size of a scanned PDF document?
I scanned a 50-page document with an HP 5610xi All-In-One using the software that comes with it: HP Scan Pro. Though the physical document has standard 8.5" x 11" pages, the PDF resulting from scanning has page size set to 35.42 × 48.67 inches (according to Preview's "Tools > Inspector". I want to resize the pages to 8.5" x 11". Shouldn't Preview be able to do that with "Tools > Adjust Size..."? When I try, the menu option is grey so I can't select it.
I'm using Preview Version 4.2.

Thanks for the insight; that explains why it's the wrong size. I selected 300dpi scanning (which is the default, actually), but HP Scan Pro evidently created a PDF with 72dpi indicated. I want it fixed because I want to distribute the file to other people and have them able to print or display it without problems.
I still don't know why Preview won't let me change it, but your question about whether I wanted to print it did lead me to find a workaround: "File > Print" and "Save as PDF..." saved it with the correct page size.

How can I change the color of interactive image label box background.

Interactive image labels are a bit overwhelming in appearance. Can I change the label background color or make it partially transparent? I have tried several things and looked this up on Lynda.com training but no info.

don't know how much this might help but you can change some colors using the Inspector as follows:
from the text menu you can control paragraph and character colors, from the text menu you can control the text color.
hope this helps...

How to change the bit-depth

When opening photos through Bridge into Photoshop CS5, all photos open in 8 bit mode. Bridge shows my photos in 16 bit Mode. How can I change the default settings in Photoshop CS5 to open into 16 bit Image Mode?
Message title was edited by: Brett N

Click here:
So you can change here:

Can I change the color of an image to a specific color code?

Since I was unable to do this in Photoshop, I was wondering if there was a way in Flash to simply change the color of an image to a speciifc color code. The image is more or less a simple line with rounded corners. It is only composed of 1 color. Does anyone know if it can be done with Flash?

Shouldn't be a problem to do it in Photoshop or Flash. Since you couldn't do it in PS, I'm guessing that there is more to it than you are making obvious here.
But in Flash you would import it, make it into a movieclip or graphic. Then apply a tint from the color effect portion of the properties panel.

How can i change the DPI of an image to 400 in illustrator?

I'm very stuck with trying to change the DPI of an image to 400 so that it is ready to print and the resolution will be fine once printed but i have no idea how to do this in illustrator?

dpi,
If you are talking about a raster image placed in Illy, you can only change the size to get the desired PPI/DPI.
If you are talking about raster effects or a raster image created in Illy, you may set the desired resolution of raster effects, or the desired resolution or total pixel x pixel size of the exported/saved image.
If you are talking about pure vector artwork, the resolution depends on your printer (driver) (settings), as Doug said.

How can I change the view of an image

Hi!! I want to ask if anybody know how to open a document from a content area not with the explorer, but with another image viewer.
Thanks in advance!!

dpi,
If you are talking about a raster image placed in Illy, you can only change the size to get the desired PPI/DPI.
If you are talking about raster effects or a raster image created in Illy, you may set the desired resolution of raster effects, or the desired resolution or total pixel x pixel size of the exported/saved image.
If you are talking about pure vector artwork, the resolution depends on your printer (driver) (settings), as Doug said.

Can you change the color of an image without changing it in photoshop first?

I have created a link for Indesign using Photoshop. It is basically a plain black graphic that is placed over an aerial to highlight the represented water. It is possible to change the color of this graphic without actually going back into photoshop?

Another option is to make a path around the image, so that you have a vector shape with full control over fill and transparency.
You can do the path in Ps, save as clipping path, bring into InD, position, convert clipping path to frame, select and delete content, fill, fade...
It may be easier to do the path in InD, but perhaps accurate positioning over the area you're after would be an issue.

How can I change the colors of this image?

I want to change the color scheme of this image, not just re-color it one color. I have the original file, this is just the shutterstock preview image.
Any tips would be much appreciated! Thanks

colored image like this one, the Hue/Saturation function can be used to alter specific ranges of colors. For example, altering the Hue and Saturation of Cyans and Yellows...
-Noel

Can I change the layer depth of a Drawing?

I've got a spiral
function spiral(centerX, centerY, radius, sides, coils, rotation){
    with(this){
        moveTo(centerX, centerY);
        var awayStep = radius/sides;
        var aroundStep = coils/sides;// 0 to 1 based.
        var aroundRadians = aroundStep * 2 * Math.PI;
        rotation *= 2 * Math.PI;
        for(var i=1; i<=sides; i++){
            var away = i * awayStep;
            var around = i * aroundRadians + rotation;
            var x = centerX + Math.cos(around) * away;
            var y = centerY + Math.sin(around) * away;
            lineTo(x, y);
lineStyle(4,0xCCB700);
spiral(260.5,438.0,125,DOTS,XE,0);
and I want some movie clips to appear infront as well as behind it, but right now it always appears on the bottom layer. Is there a way to attach the drawing to a movie clip or something so I can change it's depth?

here's the code, it's not too many lines of code, just convoluted.
bolt_range = 0;
rod_base = rod._y;
spring_ybase = spring._yscale;
spring_xbase = spring._xscale;
spring_x = spring_cap._y;
speed = 0;
activation = 1;
$a = clamp._rotation;
$b = clamp2._rotation;
$c = mgearB._rotation;
$d = sgearA._rotation;
$e = mgearA._rotation;
$f = saw._x;
$g = saw.sgear1._rotation;
$h = gear19._rotation;
$i = mgearC._rotation;
six00 = 6;
tdbase = turndial._y;
function spiral(centerX, centerY, radius, sides, coils, rotation){
    with(this){// Draw within the clip calling the function.
        moveTo(centerX, centerY);
        var awayStep = radius/sides;
        var aroundStep = coils/sides;// 0 to 1 based.
        var aroundRadians = aroundStep * 2 * Math.PI;
        rotation *= 2 * Math.PI;
        for(var i=1; i<=sides; i++){
            var away = i * awayStep;
            var around = i * aroundRadians + rotation;
            var x = centerX + Math.cos(around) * away;
            var y = centerY + Math.sin(around) * away;
            lineTo(x, y);
//lineStyle(thickness, 0xColor);
// spiral(centerX, centerY, radius, sides, coils, rotation).
XE = 2;
XPLUS = 0;
marker = 0;
rewind = 0;
active = 0;
springframebase = springframe._rotation;
onEnterFrame = function(){
markerval.text = marker;
switchact.onRelease = function(){active++;}
if(active > 2){active = 0;}
if(ticker == 2){ticker = 0;}
if(active == 0){switchact._rotation = 0;
six00 = 0;
turndial._y = tdbase;
lock._rotation = 0;
gear1._xscale = 100;
gear1._yscale = 100;
if(active == 1){switchact._rotation = +40;
if(Key.isDown(Key.UP)){six00++;}
if(Key.isDown(Key.DOWN)){six00--;}
if(six00 > 600){six00 = 600;}
if(six00 < 6){six00 = 6;}
springframe._rotation = springframebase - rewind + marker;
marker = marker - 1;
    XPLUS--;
this.clear();
lineStyle(4,0xCCB700);
spiral(260.5,438.0,125,DOTS,XE,0);
windgear._rotation += six00;
turndial._y = tdbase - 10;
lock._rotation = -10;
gear1._xscale = 100;
gear1._yscale = 100;
//windup;
if(active == 2){switchact._rotation = -40;
springframe._rotation = springframebase - rewind + marker;
six00 = 0;
gear1._xscale = 80;
gear1._yscale = 80;
windgear._rotation -= 6;
rewind = rewind - 1;
    XPLUS++;
this.clear();
lineStyle(4,0xCCB700);
spiral(260.5,438.0,125,DOTS,XE,0);
turndial.play();
turndial._y = tdbase;
lock.play();
speed.text = six00;
//1:60
seconds._rotation += six00;
gear1._rotation += six00;
gear2a._rotation -= six00/2;
gear2b._rotation += six00/4;
gear2c._rotation -= six00/8;
gear2d._rotation += six00/16;
gear15._rotation -= six00/24;
gear25._rotation += six00/60;
minutes._rotation += six00/60;
//1:3600
missing._rotation -= six00/60;
gear2cq._rotation += six00/120;
hourfix._rotation -= six00/240;
gear2dq._rotation += six00/240;
gear15q._rotation -= six00/360;
gear2q._rotation += six00/720;
hours._rotation += six00/720;
//winding mode;
DOTS = XE * 50;
XE = 8 + XPLUS/360;
//winding watch
if(Key.isDown(Key.LEFT)){marker = marker + 18;
XPLUS++;
this.clear();
lineStyle(4,0xCCB700);
spiral(260.5,438.0,125,DOTS,XE,0);
XE = 8 + XPLUS/20;
if(Key.isDown(Key.RIGHT)){marker = marker - 18;
    XPLUS--;
this.clear();
lineStyle(4,0xCCB700);
spiral(260.5,438.0,125,DOTS,XE,0);
    spring._yscale = spring_ybase - (bolt_range/0.73);
    spring._xscale = spring_xbase + (bolt_range/Math.PI);
    rod._y = rod_base + bolt_range;
    spring_cap._y = spring_x + bolt_range;
if(bolt_range < 0){bolt_range = 0; speed = 0;}
if(bolt_range > 65){bolt_range = 65;}
if(clamp.catchdot.hitTest(mgearC.catchdot)){activation = 0;}
if(rod.tip2.hitTest(catchdot3)){activation = 1;
clamp._rotation = $a;
clamp2._rotation = $b;
mgearB._rotation = $c;
sgearA._rotation = $d;
mgearA._rotation = $e;
saw._x = $f;
saw.sgear1._rotation = $g;
gear19._rotation = $h;
mgearC._rotation = $i;
//key was "DOWN" switched to SPACE to avoid interference
if(Key.isDown(Key.SPACE)){speed++; bolt_range = bolt_range +1 ;}
else{bolt_range = bolt_range - (1 + speed/2);}
//if(Key.isDown(Key.UP)){bolt_range = bolt_range - 1; transferrod._rotation = 0}
transferrod._rotation = bolt_range * 0.728;
transferrod.bend._rotation = -bolt_range * 0.414;
clamp2.pullbeam._rotation = +clamp2._rotation;
rodgear._rotation = bolt_range * Math.PI;
doublerodgear._rotation = -bolt_range * Math.PI/2;
quadrodgear._rotation = bolt_range * Math.PI/4;
octrodgear._rotation = -bolt_range * Math.PI/8;
octrodgear.transferrod._rotation = bolt_range * Math.PI/8;
octrodgear.transferrod.bend._rotation = bolt_range * Math.PI/60;
lock._rotation = octrodgear._rotation * 1.25;
dotval.text = activation;
if(activation == 0){
if(rod.tip2.hitTest(clamp2.sensor)){clamp._rotation += 5; gear19._rotation -= 5; saw._x += 8.75;}
if(activation == 1){
if(rod.tip2.hitTest(clamp.sensor)){clamp._rotation -= 2; gear19._rotation += 2; saw._x -= 3.5;}
if(rod.tip2.hitTest(clamp2.sensor)){clamp2._rotation -= 2; if(saw.sgear1._rotation != 0){
    saw.sgear1._rotation -=9; mgearA._rotation -= 6; sgearA._rotation +=9; mgearB._rotation -= 6;
    mgearC._rotation +=6;}
if(rod.tip2.hitTest(clamp2.sensor2)){clamp2._rotation += 2; saw.sgear1._rotation +=9;
mgearA._rotation += 6; mgearB._rotation += 6; sgearA._rotation -=9; mgearC._rotation -=6;}
if(rod.tip2.hitTest(clamp.tip)){if(bolt_range < 26){bolt_range = 26; speed = 0;}}

How can I change the color on an image in illustrator?

I am creating my wedding invites in Illustrator and downloaded a banner to add at the bottom. The banner is very colorful and I want to change the colors to white. Is there a way to do this? This is the banner:
Thanks in advance!!!!!

no, it is a jpeg image, I copied and pasted in to illustrator. I have never worked with this program before, so i'm learning as I go along!!

Preview issue: can't change the text of annotation taken in PDFs.

With Preview you can annotate PDFs (highlight or underline text, taking notes). It is a nice feature, and I use it a lot.
I've notice that after saving the changes made on a PDf, I can no longer modify the text in the notes (I can change the text, but these changes are not saved). To me it is a terrible limitation, I would say it is a BUG.
The workaround is to delete the note, and create a new one with the new text, but it's time consuming.
I hope this behavior will be changed soon.
Bye,
Giorgio

PDF documents were really never meant to be editable, especially not with a program named "Preview". Use a different format or some specialized software such as PDF Clerk Pro or Full Acrobat.
Message was edited by: etresoft

QuickView: How can I change the default full screen width of PDFs and JPGs

Hello,
I am very happy with the changes on the new OSX Lion. But I have a disappointment form QuickView. On Snow Leopard I will hit the "Option+Space" to QuickView files (mostly pdf and jpg) on full width and just scroll up and down with the mouse or the arrow keys. Now in Lion, when I press "Option+Space" I get the file on full height. This does not work for me because the information on screen is too small and I end up having to open the file on Preview.
How can I change this settings so they are like on Snow Leopard?
Thanks in advance.

Not only can you set global values for each of the three columns, but you can also set unique column widths on a per community basis like this:
.ptCommunity-1234 .columnOne { width: 635px; border-right:1px solid #CCCCCC; padding-top: 10px; padding-right: 20px; }
.ptCommunity-1234 .columnTwo { width: 240px; padding-top: 10px; padding-left: 8px;}
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If you have, lets say, a mainstyle1-en.css that only has about a dozen lines dictating only the few items you mentioned before - then it has been stripped at one time because the default that comes w/ an original install is huge and a great starting point. It even has style tips and snippets in comment blocks to tutor you through its gargantuan variety of options.

Can I change the location of my user-defined error file to the project directory?

The LabVIEW help says that the user-defined (XML-based) error file has to be located in the labview\user.lib\errors directory.
I would rather have the file in my Project Folders directory, as this is what is distributed.
Is there a way to make LabVIEW look elsewhere on startup.
-James

Hey, from the LabVIEW help, it looks like you don't need to worry about it.
"If you use the Application Builder to create an installer, you can place a checkmark in the Install custom error code files? checkbox on the Advanced page of the Installer Properties dialog box to include LabVIEW error code files. The installer build includes all error code files from labview\project\errors and labview\user.lib\errors and installs them in the Shared\LabVIEW Run-Time\8.2\errors directory."
If you select that checkbox, LabVIEW takes care of it for you.
Hope this helps!
Daniel Eaton
National Instruments
Systems Engineering
Embedded and Industrial Control

Can I change the bit depth on images in pdf files?

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