Where is levels in photoshop cs3




















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Sharing and Disclosure Pearson may disclose personal information, as follows: As required by law. Adjust tonal range using Levels. Do one of the following:. Click the Levels icon in the Adjustments panel, or choose Levels from the panel menu. Click OK in the New Layer dialog box. Optional To adjust tones for a specific color channel, choose an option from the Channel menu. This method does not work in a Levels adjustment layer. The Channel menu then displays the abbreviations for the target channels—for example, CM for cyan and magenta.

The menu also contains the individual channels for the selected combination. Edit spot channels and alpha channels individually. To adjust the shadows and highlights manually, drag the black and white Input Levels sliders to the edge of the first group of pixels at either end of the histogram. You can also enter values directly into the first and third Input Levels text boxes. Optional To identify areas in the image that are being clipped completely black or completely white , do one of the following:.

To adjust midtones, use the middle Input slider to make a gamma adjustment. You can also enter a gamma adjustment value directly in the middle Input Levels box. You can view the adjusted histogram in the Histogram panel. Instead, we see a 4x4 grid with a diagonal line running through it from the bottom left corner to the top right corner. The only similarity with Levels seems to be that there is a black-to-white gradient bar running along the bottom of the grid, but there's also a second gradient bar running up and down along the left side of the grid:.

With no curves to be found, why is it called Curves? The reason has nothing to do with what you start with and everything to do with what you end up with. Curves is all about taking that straight diagonal line running through the grid and reshaping it into a curve! At first, the line is straight because we haven't yet made any changes. As we bend the line to create a curve or curves , we make adjustments to the various brightness levels in the image.

Before we get ahead of ourselves, let's first look at what it is we're actually seeing in the Curves dialog box and how similar it really is to Levels. One of the most obvious differences between the Levels and Curves dialog boxes, at least in Photoshop CS2 and earlier, is that Curves does not contain a histogram.

In Photoshop CS3 and higher, Adobe did add the option to view the histogram inside the Curves grid, but I still find that the best way to view the histogram while working on an image is with the Histogram palette, since it gives you an updated view of the histogram as you're working. In both Levels and Curves in Photoshop CS3 and higher , the histogram remains static, showing you only what the image looked like before making your adjustments, so you're really not missing all that much without the histogram in Curves as long as you keep your Histogram palette open as you're working.

There are a couple of benefits to having the histogram displayed in the Curves grid, but nothing we need to worry about here. The Curves dialog box contains the same black-to-white horizontal gradient bar below the grid that the Levels dialog box shows us below the histogram. In both cases. With Curves, we get a second gradient bar as well, this time running vertically along the left side of the grid. The difference between the two gradient bars in Curves is that the bottom one shows us the Input levels while the gradient along the left shows us the Output levels.

Think of "Input" and "Output" as "Before" and "After". The bottom gradient represents the original brightness levels in the image before making any changes, while the left gradient shows us what the new brightness levels will be after making the adjustments.

We'll see how this works in a moment:. In Levels, we had a black point slider below the left side of the histogram and a white point slider below the right side of the histogram. These sliders allowed us to set new black and white points in the image, darkening the shadows and brightening the highlights. If you look closely at the diagonal line in Curves, you'll see a small square on either end, one in the bottom left corner directly above pure black in the gradient below it and one in the top right corner directly above pure white in the gradient.

These squares, or points, are the Curves equivalent of the black and white sliders in the Levels dialog box. We can click on either point to select it, and by dragging the point either left or right, we can set new black and white points for the image:.

Let's see if we can use what we've learned so far about Curves to make the same basic tonal adjustments to the image that we made with Levels. To darken the shadow areas with Levels and set a new black point, I clicked on the black point slider and dragged it in to the left edge of my histogram.

If you recall, this raised the black point from a default brightness level of 0 to level 20, which meant that any pixels that were originally at a brightness level of 20 were pulled down to pure black. We can do the exact same thing with Curves. To set a new black point, I simply need to click on the point on the left end of the diagonal line and drag it towards the right, just as I did with the black point slider in Levels. Since I'm using Photoshop CS2 and don't have a histogram displayed in the Curves dialog box, I'll keep an eye on the Histogram palette to see what's happening.

Notice that as soon as you click on the point, both the Input and Output readings below the bottom gradient bar show a value of 0, letting us know that the black point is currently set to a brightness value of 0 and we haven't yet made any changes. As you drag the point horizontally towards the right, the Input reading increases while the Output reading remains at 0. This tells us that whichever original brightness level we select with the point the Input level is being pulled down to level 0, or pure black the Output level.

I'm going to drag my black point to level 20, the same value I set it to in Levels:. To set a new white point in Levels and brighten the highlights, I dragged the white point slider in to the right edge of the histogram, lowering the white point from it's original value of down to This pushed any areas in the image that were originally at a brightness level of up to pure white. Once again, I can do the exact same thing with Curves. The point on the right end of the diagonal line works exactly the same way as the white point slider in Levels.

I simply need to click on the point and drag it horizontally towards the left. Again, the Curves dialog box in Photoshop CS2 does not contain a histogram, but I can easily view the histogram in the Histogram palette as I drag the point. As soon as you click on the point in the top right corner, you'll see the Input and Output readings display a value of , indicating that our white point is currently set to its maximum brightness value of and we haven't yet made any adjustments.

As you drag the point towards the left, the Input reading changes while the Output reading remains at , telling us that whichever brightness level we select with the point is being pushed up to pure white.

I'm going to drag the point towards the left until the Input reading is displaying a value of , the same value I set the white point to in Levels:.

If I look at my Histogram palette once again, I can see that I've successfully made the exact same adjustments to the image with Curves that I made with the black and white point sliders in Levels.

The histogram now extends all the way from the far left to the far right, showing a full range of tonal values from pure black to pure white, except of course for the detail we've lost by stretching the tonal range, indicated by the same comb-like pattern we saw earlier:. And if we look at the image itself in the document window, we can see that its overall tone has been improved:.

What about the midtones? This is where Photoshop's Curves adjustment starts to get interesting.



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