



Levels
The Level tool can change the intensity range of the photo. This tool is used to make an image lighter or darker, to change contrast or to correct a predominant color cast. When you select the Colors>Level tool, a histogram box will pop up. You'll notice a small slider just under the histogram. Grab the slider and move to the right and left and notice the difference it makes to your photo. Here's my photo where I've adjusted the slider to the right. It has given the aloe photo a darker, richer look.
Curves
The Curves tool is the most sophisticated tool for changing the color, brightness, contrast or transparency of the active layer or a selection in your photo. If you're unsure what that means, no worries, I'll walk you through using the tool in a minute. While the Levels tool allows you to work on Shadows and Highlights, the Curves tool allows you to work on any tonal range.
OK, now select Color>Curves on your photo. You'll get a neato grid with a grey histogram and a line going from the lower left to the upper right. Again, it all looks complicated but let's make an easy adjustment and see what it does to the image.
First, click in the middle of the angular line and pull the line down slights with your mouse. You'll notice your photo is looking alot like it did when we used the levels tool. Now comes the fun bit ... hang on ... click on an area of the line you have just pulled down (it's now more of an arc than an angled line) to the right of the mid point. Pull this part of the curved line up just a little.
Watch what happens to your photo. Click below the mid point of your arc and pull the line down a little. See the changes?
You should experiment with this tool for awhile and get get the general feel for manipulating the 'curve' to produce results.
Let's move on to playing with color.
Hue-Saturation
Select Color>Hue-Saturation on your photo. Here's more configuration razzle dazzle. What's worth playing with are the three sliders sitting under the bold heading Adjust Selected Color. I'll grab the Saturation slider and give it a good yank to the right ... oh ahhhh .... my aloe becomes very green. But I won't stop there. I'll now push the Hue slider around. Well, maybe I went too far, here's the aloe very Saturated and over Hued!
I'll give it another go because I noticed that while playing with the sliders I could bring out a nice red color on the spines of the aloe. I like that.
Speaking of color, let's do more.
Colorize
Colorize is a great way to put a color tone or wash over the photo. Sometimes it has a great effect, other times, no so much. Select Color>Colorize on your photo. You've got a selection of sliders again. Go like mad and see what effect they produce. For the aloe.jpg, I've selected a nice blue tone with a slight twist of saturation. Do you like it?
The final tool in our down and dirty Color menu that I'll demonstrate is the Color Balance.
Color Balance
Go for Color>Color Balance. Wow, surprise, you get some more sliders. Three in fact. On top of the sliders you even get a selection of radio buttons. I hope that by this stage you have overcome some of the hesitation and fear about jumping in and experimenting with your photos. Jump in with reckless abandon and work some color magic. I ended up with this lovely fire aloe.
So that's it for the quick tweeks in the Color Menu. I want to show you one final essential trick in my arsenal before moving off these photo enhancements. Let's have a crack at sharpening your photo.
Sharpening
In GIMP you have a couple of options if you want to sharpen your image. The first is a straight forward Filters>Enhance>Sharpen move. It'll do an auto sharpen on your image. But, hey, who wants to do anything automatically when we can play with sliders? Ditch the auto crap and let's pull out the big one Filters>Enhance>Unsharp Mask. Like all the other tools, I'm sure you'd benefit from carefully reading the GIMP manual to grasp all of the idiosyncrasies of the Unsharp Mask - I'm sure I would. But, if your like me, you'll just start pushing things around and rely on the preview to guide you.
I've kept the fire aloe from the previous tool and went straight to the Unsharp Mask. Here's the stark results.
This is a little over kill but you get the general idea. Right? Just for Kicks, here's the original aloe.jpg using Unsharp Mask.
That's all of the enhancements that'll I'll show you this go around. There's heaps more you can do like using image burn, alpha masks, spot colorizations and more that I'll run down in later tutorials.
Now that you have played around with your photo, you should be able to put together a combination of some of the above techniques to feel quiet satisfied with the result. Here's my aloe.jpg.
If I remember correctly, I used Level, Hue-Saturation, and Unsharp Mask to get the final.
So now what are you going to do with your image? If you're gong to print it ... then your basically done. If you are posting it to the internet or you want to add a frame to it. Here's a simple frame technique.
Frame
Here we go. First create a new layer. You can find the new layer button in the Layers Dialog Box. If you don't have a Layers Dialog box floating around your screen click on the GIMP tool panel. Select File>Dialogs>Layers or you can try pressing CTRL + L (works on my machine). OK, now you have the Layer Dialog box in front of you, run your mouse along the little icons at the bottom. The first one should say something like 'create a new layer ....' when you hover over it with the mouse. Click Create a New Layer.
Go back to your photo and select all. You can either go to the menu Select>All or just press CTRL + A. Have a look back at you GIMP tool panel. See the color boxes below the other tools. It is probably showing a black and white box. Click the top box and select what ever color you want your border or frame to be. I'll use white for the aloe.
Now go to menu Edit>Stroke Selection. In the dialog box give your photo a healthy line width. Remember you can have a few goes to get the right width. I usually use something between 70 to 120 on full sized images. Of course, with smaller images, you'll use much smaller widths. When you've added a value in the width department, hit stroke selection. Do you like the look? If not, use your undo command (Edit>Undo).
Now you have a nice frame around your photo.
I recommend that you upload your photo to deviantart. I found that by pitching my photos out there for others to see and comment upon, I learned and gained more confidence. I also recommend that you seek out photographers that you admire and you 'watch' them. A lot can be learned from just watching what a good photographer produces as well as having the opportunity to interact and seek advice from them.
Be sure to look me up and give me a yell. I'd love to see what you can do ![]()
It's that simple ... and better yet, it costs next to nuthin!