Hi, I'm new to Photoshop. I have a picture of my daughter smelling a flower. I want to keep the color of the flower yellow and change the rest of the photo to black and white. Any help with this would be greatly appreaciated. Thanks.
You first need to isolate the flower..
This can be done in a variety of different ways depending on the image characteristics but most versatile is generally the pen tool. This can appear a little daunting at first but is really very straight forward. If you have trouble with this though, other options include, lasso, extracta and wand amongst many others.
Once you have a tight path around the flower, convert this to a selection and copy the contents to another layer.
Now you have two seperate layers, one of the BG, one of the flower. You can then simply desaturate (remove color info) the BG and leave the foremost layer as it is.
For tips on pro B/W techniques in photoshop look into duo-toning..
Another approach is, once the flower is either masked, or copied to a new layer, add a Channel Mixer adjustment layer. You can control how much of each color channel is used. I usually use 34,33, and 33. Check the monochrome box to display the image as B&W. This approach has some advantages over simply desaturating the image.
Note that nothing destructive has been done to the image.
Go to Image/Adjustments/Desaturate (I have win xp and CS2).
Picture is now B/W.
Select your History Brush (looks like a paint brush with a arrow circling it). On my Tools palette it is on the right side, 5th down. (Click and hold- you then have the choice between History and Art History Brush. Select History- Art History will give you some fun effects.)
You'll see a circle- this is the size of your brush which you can change. Zoom in or out and make the brush as small or large as you like if you want to get detailed. Click and drag and your color will reappear.
Since you are new to Photoshop, save the file under a different name so you can preserve your original.
I don't remember where I found this method, but I've found many helpful tutorials on the Adobe website-
Another cool thing are the "Actions". Downloading these helped me figure out other techniques in PS. And if you do some internet searches for PS tutorials, you'll find tons of them to experiment with- many of which are simple to follow.
I was recently taught this one at a seminar (wish I could call it my own). Make a copy layer of the background, then, in LAB color mode, select the lightness channel. This will show you a B&W image. Then change the mode to grayscale. You will now have a B&W image, but the color is still available in history. Use the history brush to paint over the areas where you want the original color to reappear. You might want to turn the opacity down to 50-75% to give it that hand-painted pastel look. The advantages are that you get back the original color with all its variations in color and density, and that there are no rough selection edges to deal with. It's fast, easy, and gives some of the best looking results I have ever seen.
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