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UNIT-V
Filters:
Filters def:
A software routine that changes the appearance of an image in Photoshop
Introduction to Filters:
1. Open the Eagle image.
2. Select Filter
Artistic
Sponge from the menu.
3.
The Sponge filter dialog box appears. You can make any adjustments here.NOTE: If you are worried about permanently altering an image, you may want to create a duplicate layer and then apply the filter to the new layer.
4. Click OK.
Photoshop applies the Sponge filter.
5. Select File
Revert from the menu.
NOTE: Depending on which image mode you are working in, a filter may or may not be available. The following table summarizes each filter type and describes when it is available
Applying a Filter to Part of an Image:
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1. Make sure the Ducky image is open.
2. Use the Magic Wand tool to select the white area around the duck.
The entire white area around the duck is selected.
3. Select Select ModifyExpand from the menu.
The Expand Selection dialog box appears.
4. Enter 15 in the Expand By text box. Click OK.
The Expand Selection dialog box closes. Now you are ready to apply the filter. Remember, Photoshop will only apply the filter in the area you selected, including the outside edge of the duck.
5. Select Filter Distort Ripple from the menu.
The Ripple filter dialog box appears.
6. Drag the Amount slider all the way to the right.
This will give you the full effect of the filter.
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The Ripple filter dialog box closes and the filter is applied. Notice only the edges are affected and the center of the duck is left unchanged.
8. Select File Revert from the menu to get the original image.
Converting a Photograph into a Drawing:
In this you will learn how to convert a photograph into a drawing using the Find Edges filter.
1. Open the Eagle image.
2. Right click the current layer in the Layers panel, then select Duplicate Layer from the menu.
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3. Select Filter Stylize Find Edges from the menu.
You’re done. The photograph now appears as a drawing. Now see what happens when you select Image Adjustments Invert from the menu.
NOTE: You will not see a dialog box when you apply the Find Edges filter. The filter is applied immediately.
4. Select File Revert from the menu to get the original image.
Liquefying an Image :
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2. Select Filter Liquify from the menu.
Photoshop displays the Liquify dialog box. The chart below describes all the modifications you can make.
3. Click OK.
The Liquify dialog box disappears and Photoshop updates the image with the changes you made.
4. Select File Revert from the menu to get the original image.
Freezing and Thawing an Image :
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2. Select Filter Liquify from the menu.
Photoshop displays the Liquify dialog box.
3. Select the Freeze tool.
The Freeze tool is located on the left side of the dialog box.
4. Set the Brush Size to 50.
You can adjust the brush size on the right side of the dialog box, under tool Options.
5. Click once over the left eye.
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6. Click once over the right eye.
Your image should look like Figure 11-10. Both eyes are now frozen. To prove this, you can select one of the tools and then try to modify the image.
7. Select the Warp tool.
The Warp tool is the top-most tool on the left side of the dialog box.
8. Click and drag around the eyes.
As you drag, some pixels will move. But the eyes should remain intact. Now let’s unfreeze the eyes.
9. Select the Unfreeze tool.
The Unfreeze tool is located below the Freeze tool.
10.Click over the frozen areas.
The red paint disappears, and the areas that were frozen are now unfrozen.
11.Click OK.
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12.Select File Revert from the menu
Reconstructing a Distortion :
You can use the Reconstruct tool to bring distorted areas back to their original state. Use the Reconstruct tool if you make a mistake or if you apply a distortion too liberally.
1. Make sure the Ducky image is open.
2. Select FilterLiquify from the menu.
Photoshop displays the Liquify dialog box.
3. Apply a distortion using the Warp tool.
The Warp tool is the top-most tool on the left side of the dialog box.
4. Change the Mode to Revert.
The Mode menu is located in the Reconstruction controls, on the right side of the dialog box.
5. Select the Reconstruct tool.
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6. Drag over the distorted areas.
As you drag, the distorted areas should transform back into their original states.
NOTE: To remove all distortion from an image (including frozen areas), click the Revert button located in the Reconstruction controls on the right side of the dialog box.
Click OK.
The Liquify dialog box disappears.
7. Select File Revert from the menu.
Viewing a Mesh and Saving a Distortion :
You can display a special grid called a mesh as you make distortions to your image in the Liquify dialog box. A mesh allows you to calibrate your distortions.
1. Make sure the Ducky image is open.
2. Select Filter Liquify from the menu.
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3. Apply a distortion using any of the distortion tools.
We used the Turbulence tool for this lesson.
4. Check the Mesh check box.
The Mesh check box is located in the View Options controls, on the right side of the dialog box. You can also adjust the Mesh size and the Mesh color using the View Options controls.
5. Click the Save Mesh button.
The Save Mesh button is located in the top right corner of the dialog box.
Photoshop displays the Save Mesh File dialog box. You can enter a file name here. To load the mesh later, simply click the Load Mesh button.
6. Click Cancel to close the Save Mesh File dialog box, then click Cancel again to close the Liquify dialog box.
The Save Mesh File dialog box and the Liquify dialog box close.
7. Select FileRevert from the menu.
Effects using filters:
Artistic
This sub-menu allows you to simulate the effect of using artistic equipment and media such as colored pencils, pastels, and watercolors. Some examples of the effects are shown below. For most, the artistic effect is obvious...but plastic wrap? Surprisingly, this filter is useful for giving objects in your image a watery, glassy, or even metallic shine. It can also be used to give objects a "gummy" appearance that's great for logos.
It contains the following:
Colored Pencil
Cutout
Dry Brush
Plastic Wrap
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Sponge
Blur:
The Blur sub-menu does exactly what it says--it blurs your image
Gaussian blur
Gaussian Blur is invaluable for softening items in your image, especially when painting highlights and shadows by hand or adding a soft glow
Motion Blur
Motion Blur and Radial Blur can be useful in combination with other filters to make patterns and textures.
Radial Blur
Radial Blur, which either swirls the picture in a circle (below) or makes lines radiating outward from a point.
Brush Strokes
This is very similar to the Artistic sub-menu. Some of the possible results are shown below.
Accented Edges
Angled Strokes
Crosshatch
Spatter
Sprayed Strokes
Distort:
The Distort sub-menu warps and disrupts the image in a number of different, often extreme ways.
Diffuse Glow
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Ocean Ripple
Shear
Spherize
zigzag
Noise:
The Noise sub-menu is used especially when repairing photographs. It helps to make small blemishes(A small mark that makes the appearance of something less attractive) less noticeable.
It can also add noise, which is convenient when combining filters to make patterns. The items of the Noise sub-menu are illustrated below.
Add Noise
Despeckle
Dust & Scratches
Median
Pixelate:
The items on the Pixelate sub-menu distort the colors of the image by grouping areas of nearby pixels together into large blocks or dividing portions of the image into various shapes and sizes. Examples of this are shown below.
Crystallize
Facet
Fragment
Mezzotint
Mosaic
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Render:
This sub-menu allows sophisticated () three-dimensional manipulation
and lighting effects. The cloud filters, in particular, are extremely convenient when combining filters to make patterns. Samples of this sub-menu's functions are illustrated below.
3D Transform
Clouds
Difference Clouds
Lens Flare
Lighting Effects
Sharpen:
This is another sub-menu often used for photo repair. It emphasizes the outlines of objects as determined by sharp differences in color or intensity. The items of the sub-menu are demonstrated below.
Sharpen
Sharpen Edges
Sharpen More
Unsharp Mask
Sketch:
This is another sub-menu designed to simulate artistic drawing techniques and media. Some examples are shown below.
Conté Crayon
Graphic Pen
Halftone Pattern
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Torn Edges
Water Paper
Stylize:
This sub-menu distorts the image colors in extreme ways. It is very useful when designing patterns and logos. Samples of this sub-menu are illustrated below.
Diffuse
Extrude
Find Edges
Glowing Edges
Trace Contour
Wind
Texture:
As the name suggests, this sub-menu applies a three-dimensional or other texture to the image, as shown below. If we used creatively, these items can incredibly enhance your work.
Craquelure
Grain
Mosaic Tiles
Patchwork
Stained Glass
Texturizer
Video:
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Other:
This sub-menu allows various other functions (below). In particular, the Custom item lets you input values to design your own filter.
Custom
High Pass
Maximum
Minimum
Offset
Digimarc:
