barcode generator project source code in java 9: Correcting Images with the Computer in Software

Encode EAN13 in Software 9: Correcting Images with the Computer

CHAPTER 9: Correcting Images with the Computer
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5 Slide the white triangle to the left until it is at the point where the graph
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starts to curve up (in this case, about halfway through the graph see Figure 9-6) This is where the magic of levels takes place When you change the slider, the program takes the newly defined graph segment (between the black and white arrows) and spreads it to cover the complete tonal range from black to white This is shown in Figure 9-6 The image now has the maximum amount of value range to display detail properly
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6 Adjust the black triangle on the graph slider so that it just touches the
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histogram where it starts to rise
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7 Once you ve expanded the brightness range to cover the entire histogram
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for each primary color, your image will have near-perfect color balance Now, only now, and not one second before now, you can adjust your exposure You should do that to all three channels equally in order to maintain color balance So now and only now you will use the middle slider
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FIGURE 9-6
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Adjusting the tonal range with the Levels command
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Digital Photography: 99 Easy Tips to Make You Look Like a Pro!
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First, choose the RGB (composite) channel from the Channel menu Now, drag the gray (midtone) slider back and forth until you are happy with the overall brightness of the image Your image is now color balanced and contains a pure white highlight, a solid black deep shadow, and perfect midtones It s the digital version of Ansel Adams famous Zone System If the histogram is taller than the level part of the graph at either the white or black end, do not move that slider yet and probably never
59 Create Instant Effects
Photoshop Elements provides an Effects Palette that automates the process of applying special effects to your images, enabling preset routines that perform a series of operations on a selection, text, or a whole layer to produce unique effects
Why Should I Use Instant Effects
Would you want to eat bland food every day, or would you rather add some spices to enhance the flavor so the experience is richer Instant Effects can add some visual spice to your digital-imaging projects Digital imaging is exciting because you can go beyond the realms of pure photography and explore a broader range of visual beauty and art than you can with a camera alone The why of using these effects comes from your personal need to express a larger view than snapshots alone can communicate These effects let you be adventurous On the other hand, overusing effects and using them just for the sake of it usually produces tragically trite results
How Do I Use Instant Effects to Alter the Image
Applying effects to your images is easy in Photoshop Elements
1 Open an image in Photoshop Elements 2 From the Window menu, choose Effects The default menu will display,
showing each of the effects in a thumbnail view so you can get a sense of what each effect does Effect types are broken down into four categories: s Text Effects s Image Effects Apply only to a text layer Affect the whole image
CHAPTER 9: Correcting Images with the Computer
s Textures Add a new layer with the texture applied
s Frames Alter the edges of the image
3 To apply an effect, click and hold down the left mouse button on the effect
thumbnail; or, if you are working in List view, click and hold down the mouse on the effect name The cursor will change to a grabbing hand
4 Drag the effect over the image and release the mouse button You can also
select the effect and then click the Apply button at the upper-right of the palette But wait! You can also apply the effect by double-clicking its icon in the Effects Palette
60 Use Recipes for 31 Complex Solutions
In Photoshop Elements, recipes are lists of preset step-by-step instructions that perform a variety of tasks They are an adjunct to the help system conveniently placed in an easy-to-access palette These recipes are found in the How To Palette in the Palette well (at the right end of the Options bar)
Why Should I Use Recipes as Solutions
Recipes are an excellent learning tool because they take you through common editing tasks one step at a time, like a good cookbook steps you through a recipe The recipe tells you what tools you need and how to apply them properly They also provide links in the text that automatically bring up the tools and commands that you need as you follow the procedures Recipes are handy reference guides and valuable aids for the new user As Adobe releases more recipes, you can download them from the link provided in the drop-down menu on the How To Palette
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