Colour image on black & white photograph

How can I convert a colour photograph to part black & white? I believe I need to de-saturate to start with, but that's as much as I know.

John,
Since you asked about selection, here's an example using the Magic Wand and Selection Brush tools.
http://home.earthlink.net/~msand42/PSE/Selection%20Brush/album/
In the 1st shot I used the Magnetic Lasso to select the cat. This worked well since the outline of the cat contrasted with the background. For purposes of my example, I then cut off from the selection the top of his head and part of his paw, and selected a part of the blanket.
In the 2nd shot I activated the Selection Brush tool with the Mode option set to Mask and inverted the selection. Now the cat is masked in red. Note that the default Overlay value is 50% so that you can see through the mask. You might need to modify the Overlay so that you can see enough detail to paint the mask (next step). As you can see, the two missing portions of the cat are not masked and the excess blanket is.
In the 3rd shot I painted to fill in the missing portions of the cat. To erase the excess on the blanket I held down <Alt> while painting. You can adjust the size of the brush to get the necessary level of detail for painting.
In the 4th shot I inverted the selection and and set Mode to Selection to get back to the normal view showing the selected cat.
Of course if you have a steady hand you can simply draw the selection using the Lasso tool, but I wanted to demonstrate how you can fine-tune it with the Selection Brush.

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Open a color image in Full Photo Edit
On the top menu click Layer >>Duplicate Layer >>OK
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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.
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Hello there.
I'm making a type of cutter, that cuts stamps out of potatos. Currently, the pattern is an array of booleans of 25x25, where you have to click what you want to see and then the program cuts it out. We'd like to add more functionality though, perhaps by allowing images to be imported and these should then get put in the array, according to black/white-scale.
I have absolutly no idea how I'd start doing anything like this.
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Hi,
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What falkpl ment with VDM is Vision Development Module. This is an addon which you can install onto LabVIEW. It gives you a large library of VIsion functions to work on your images. For more info goto:
Vision Development Module
NI IMAQ is a driver for our Frame Grabbers to capture images from cameras.
Hope this helps. Have a nice day
Rik Prins, CLD
Applications Engineering Specialist Northern Europe, National Instruments
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If you're a professional photographer with 50,000 pictures stored now and more coming all the time, you need to forget about using iPhoto and get yourself some professional-quality digital asset management software. iPhoto is not meant for people like you, and instead of providing a simple, elegant one-stop answer to all your needs, iPhoto is actually complicating your life.
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Acquire black/white from color camera

I have a color camera and would like to acquire image in black/white. I want to tried grabbing image in black and white because I want to increase speed of the program. I tried changing the format of the image from RGB to float when creating an image (IMAQ create image), it worked but the program worked so slow. My questions are:
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Bruce Ammons
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Any other suggestions for getting these two useful slider back ?
(but why take them away in the first place ?)

We are at cross-purposes here:
Simon is talking about using a
Black and White Adjustment Layer.
It is in the palette for that kind of layer that you will see the Tint Box with the little colored square beside it.
If you check the Tint Box and then CLICK on the little colored square, you will open the regular Color Picker (as shown in # Eight).
At that time, Sliders are available for any selected channel, or choice of input, when you click its dedicated Radio Button.
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13" white MacBook Mac OS X (10.4.9)

Hi essman,
As S-Video cables send their chroma (colour) and luminance (brightness) signals separately it sounds as though the problem may be found either in your S-Video cable or in one of the S-Video connectors. If only the luminance pins/wire was working correctly your video signal would appear to be in black and white.
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why are my duotone images turning black and white when put in indesign?
I have been playing duo and montotone images into indesing with no trouble. Then all of a sudden as I placew them they go black and whitre. I have tried everything from re saving, re making in photoshop and differant colours et5c. But nothing seems to wrok. The images already in my document arew fine it is just new ones. If someone could help that would be great

Can you start a new document and then load one of the duotones known to be good in the working file and have it correct? If so, try one of the duotones known to be bad in the working document in the new file. Does it work?
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Hi everyone,
to explain what I'm doing first.
I am creating a bi-monthly magazine for a club, the magazine is printed in black & white with greyscale images, with a colour cover spread.
This magazine also appears on the clubs website in full color.
So my question is, can I create the whole magazine on inDesign in full color, then export it as a PDF in full color for the website. Then export a second copy as a PDF with the color cover spread and internal pages in black & white/grey scale.
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You can make the magazine in full colour and export to PDF, giving you a full colour.
You can then use Acrobat to Convert the PDF to Grayscale (save as a new name) and that can be your black and white version.
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To get a grayscale PDF from InDesign you would need to use File>Print and print directly to a PDF OR to postscript (then use acrobat distiller to distill the PS file). But printing to PDF is frowned upon by many.
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Colour image on black & white photograph

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