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GIMP isn't Photoshop. Adobe Photoshop is an entirely different application.

What you want to do is sometimes called selective colorization. Just google GIMP selective colorization tutorial. http://www.google.co.uk/search?q=gimp+selective+co...

Or you could use my method:

1. Open your color image

2. Right click the background layer in the layers dialog and choose duplicate layer

3. Click Colors>Desaturate>OK

4. Right click the new black and white layer in the layers dialog, and choose add layer mask. Choose black-full transparency in the options.

5. Click on the paintbrush, choose white as your foreground color

6. Paint over the area you want, to bring the color back.

7. If you make a mistake, and go over the lines, change your paintbrush color to black and paint the black and white image back.

8. Painting in white will reveal the image under the layer mask, painting in black will repair the layer mask.

If you use the above method, and save your file as an XCF, you will still retain the original color image on the background layer. If you switch off the black and white layer (uncheck the eye icon in the layers dialog) you will see the original color image.

First, I suggest copying the original layer that the photo is on so that you can work on a new layer and keep the original in the background as a 'backup' and for comparing purposes.

Once you've done that, you need to select the part of the picture that you want to convert to black and white. There are a number of selection tools you can use. There's a rectangular marquee, an ellipse selection tool, a freehand lasso tool, an 'intelligent' scissors tool, a magic wand tool, a color select tool, and you can also turn on the quick mask and use standard painting tools and filters to alter the selection that way. Using some combination of these tools, select the entire region that you want to convert to black and white. Note that in order to modify the actual picture, you need to be outside quick mask mode, so if you use the quick mask make sure you exit quick mask mode when you're done modifying the selection. Once you have the region selected, go to the menus at the top of the image window and look for something along the lines of 'color tools' and then 'hue/saturation'. Select the 'hue/saturation' option. There should be a slider bar in that window marked 'saturation'. Drag it all the way down to the bottom. Then press Okay to confirm the operation. Finally, press Control+Shift+A to cancel your current selection and see what the resulting image looks like.

OK. First of all, you said its the 'free gimp photoshop'. GIMP is a completely different thing to photoshop, so please from now on refer to them as either GIMP or photoshop, depending on the software you are talking about. Now, I am not too familiar with GIMP, but what you want to do is select ONLY what you want to colour. Then, right click and there should hopefully be a select inverse option. Then, turn it black and white.

No questions asked, the best site for Photoshop tutorials is: http://www.learnphotoediting.link/

All tutorials are in video format, which makes them easier for you to follow along with the instructor. The videos are interactive and very easy to follow, this will help you learn piano three times faster. Good Luck!

The best way is to use layers.

(Find the tutorial on how to use layers.)

Your original image is one layer.

Then make another which is black and white (monochrome).

On your original layer cut out the piece you want in colour.

Paste this into a new layer.

Delete the original colour layer.

Done.