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This page will teach you how to make basic steps by using photoshop
basic steps in photoshop
Correcting Color Casts and White Balance Problems
This works in every version of Photoshop. It works with every kind of image, RAW, JPG or whatever. I'll cover three different tools, all of which do the same thing differently. These tools are the Color Match tool, the Levels tool and the Color Balance tool. All these tools are in every Photoshop version made in the past 10 years or so, but the Color Match tool has only been around a few years.
COLOR BALANCE TOOL
Go to IMAGE > ADJUSTMENTS > COLOR BALANCE or simply command + B.
Move the sliders.
I usually like things warmer than most people shoot them, so I tend to slide them towards Red and Yellow. This is how you change the color temperature or white balance setting of any image, even JPGs. Also wiggle the Magenta/Green slider to correct for fluorescent lights.
Lightening Underexposed Images
This isn't a trick; it's the most common adjustment I do. This works in every version of Photoshop and with every kind of file: RAW, JPG and everything.
If you're unsure of an exposure it's better to underexpose a digital camera and correct it later. This is perfect for shooting JPGs. This process is much easier and gives the same results as shooting RAW.
We do this in a few different ways.
LEVELS COMMAND
Go to the LEVELS adjustment either by IMAGE > ADJUSTMENTS > LEVELS or simply command + L.
You'll see a histogram; which is a graph charting the relative amounts of light and dark in your image. You'll see that it doesn't make it all the way to the right of the space in which it sits. Click and drag the little white slider on the far right of the histogram to the left, just enough to meet the rightmost edge of the histogram. As you drag it make sure PREVIEW is checked and you can see what you're doing. Hit OK and you're DONE!
Hold the OPTION key on Mac while doing this and the image will go to super-high contrast. Drag the white slider left until some points just start to sparkle out of the black background. Take your finger off the Option key to see how the image really looks.
CURVES COMMAND
This is a little more complex. This is better if you have an image with bright highlights and want to bring up the shadows in exchange for flattening the highlights a little. Deliberately underexposing a digital camera in contrast light and then doing this actually improves the image over a conventional exposure, because it gives you the ability to create a shoulder for the highlights that's missing in digital cameras.
Call up curves by IMAGE > ADJUSTMENTS > CURVES or simply command + M.
Put the cursor on the lower middle of the diagonal line. Click and hold it and drag it up. Have fun, you can do an awful lot here.
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