Showing posts with label ICT. Show all posts
Showing posts with label ICT. Show all posts

Wednesday, November 6, 2013

Computer Hardware Servicing Evaluation

Read and Analyze the following statements and questions carefully, then chose the best option that is suited and needed.
Aim:  To test and enhance the student ability in sustaining and repairing computer hardware.
9 -10 Excellent
7-8 Very Good
5-6 Fair
0-4 Needs improvement

Tuesday, June 4, 2013

Monday, November 12, 2012

Photoshop Layer Masks

Layer Masks
Using Layer masks (not available with Elements) allows separate parts of layers to be hidden to show the layer underneath. as this is done with a mask, the original layer remains untouched, so mistakes can be easily rectified or changes made to the mask later.

Keeping the resolution size
Whenever you import a new layer, it must be the same resolution as the other layers. It does not matter if the document size is smaller, or if just part of a shot is used with a mask applied to the rest.

Making a selection for the mask
To make a selection for a mask, first make a rough selection around the relevant area. It does not have to be exact at this stage, or applied with a feather, as a more precise shape will be achieved later by directly manipulating the mask. Remember, when the selection is made. It is the area inside that will be preserved. This selection can be inverted by selecting Inverse from the Select menu.

Tuesday, November 6, 2012

Photoshop Layers

One of the most important features of Photoshop (and Elements) is the ability to work on images using Layers Different parts of an image can be changed independently on separate layers, which are controlled through the Layers palette and the Layers menu.

Layers palette
This is used to control and organize layers. When an image is opened, a small icon of the photograph appears. This is titled Background Layer. From here, new or duplicate layers can be added on top of the layer. The active layer (the layer being worked on) is highlighted in blue. To move between layers, simply click on the relevant icon or name.

Photoshop Styles and Effects

Photoshop Elements has some extra Effects listed in the menu to the right of the work space, which are used in a similar way to alter the look of photographs. Some will create textures or enhance text, while others add borders or create very exaggerated effects.

Use this effect to make a snow scene, perhaps for Christmas cards. Other Effects include Lizard Skin and Marbled Glass.

Oil Pastel
Use this to diffuse the tones of your image, except for the edge detail which takes on a dark, charcoal quality. This is one of Element's less extreme effects.

Photoshop Lens Correction Filter

This is one of the most useful filters in Photoshop, it can be used to correct several common lens distortion problem.

Lens distortion
Many lenses, especially zooms on cheaper digital cameras, are liable to slightly distort the image, either by visually bowing out (barrel distortion) or by misalignment color channels to a small degree, which shows as fringing on edge detail. When opened, this filter displays the complete image, overlaid with an optional grid and commands on the right hand side.

Before removing the distortion, ensure the image is perfectly straight. A small toolbox on the left contains Rotate Canvas. Simply click on the box and then draw a line over a plane that is meant to be straight (either horizontal or vertical) and release the mouse.

Wednesday, October 31, 2012

Photoshop: Blur filters

It is probably easier to understand the Blur filters, as blur is an accidental effect anyone with a camera will be familiar with. These filters reduce sharpness for various visual effects. There are several to use from.

 Use this to turn all the different levels of tonality and color in a photograph into an average single flat tone. Technically speaking, Average isn't actually a blur filter.

Blur and Blur More
 Use this to add a degree of blurring. To increase the effect, use them again and again. However, you may find other filters more useful.

Tuesday, October 30, 2012

Photoshop: Sharpen Filters

These filters are used to increase apparent sharpness.

Sharpen and Sharpen Mode
 Digitally, it is possible to sharpen images (or at least make them appear sharper) by increasing edge contrast. Experiment with the Sharpen or Sharpen More filters, but be careful not to take it too far as the edges will start to glow.

Unsharp Mask
 None of the Sharpen filters can do anything for a photograph that is out of focus, but they can certainly improve the clarity of one that is slightly soft. this is often necessary for scanned images. For finer control, use the Unsharp Mask, but again with caution. It has three main colors: amount, radius, and threshold.

 When "sharpening" takes place, it occurs by increasing pixel contrast, which is controlled by the Amount slider. Usually, a value of 100 percent or more is required.

 This refers to the number of pixels around the edge area that are being sharpened. A lower number will only sharpen edge pixels, while a higher number will sharpen a broader area.

 This amount determines how far apart of pixels must be from each other to be considered as separate areas to be sharpened.

Sunday, October 28, 2012

Photoshop: Sketch Filters

 Sketch filters use linear effects and textures to create the look of handdrawn artwork or very basic reproduction techniques. They are mostly monochromatic, and the colors set through the Color Picker.

Use for rough dark sketches. Chalk and Charcoal will give a finer result, giving the impression of charcoal having been used for the shadows, chalk for the highlights, and the image being drawn on midtone gray paper.

Photocopiers were once notoriously bad at reproducing photographs. For a retro 1960s cheap newsletter look, use this filter. For very strong graphic results, increase both the Detail and the Darkness.

Graphic Pen
Some  illustrators stroke in detail onto a drawing using a very fine graphic pen. use this filter to give the same impression. It offers a choice of four directions of stroke, length of stroke, and balance of density. For softer pencil-like results, choose a gray for the Foreground Color.

Halftone Pattern
Use this impression of a simple dot screen by converting a photograph into a series of tiny dots for photomechanical reproduction. For some interesting pop art effects, enlarge the screen in black and white and then add block colors. Your image will then require some sharpening.

Use this filter to make your image look like a very simple rubber stamp. For bold graphic effects, keep detail to a minimum.

Conte Crayon
This filter resembles Conte Crayons drawn onto a variety of heavily textured surfaces, including brick, sandstone, and canvas, but sadly not paper. you can control the foreground and background colors, the relief and scaling properties of the texture, and the direction of the light illuminating the surface.

Wednesday, October 17, 2012

Photoshop: Stylize Filters

  More exaggerated effects are possible using the Stylize Filters.

Use this filter, which simulates the photographic darkroom technique of solarization to partially reverse an image. This was traditionally done through rexposing a negative or print during development. It is usually more effective on black-and-white photographs.

Find Edges
  Use this to create a very exaggerated linear rendition of your photograph. It is often best applied having first converted the image to monochrome. For more controllable results, use the Glowing Edges filter, but this will convert the image to negative. However, this can be easily inverted by pressing Ctrl/Command I.

Photoshop: Distort Filters

 These are used for more extreme physical changes to an image.

Diffuse Glow
  Use this excellent filter for adding a soft ethereal glow to highlights, as well as textural grain if required. Effects can vary from just a touch in the highlights to giving the whole image a bright ghostly appearance with just diffused shadows appearing.

  Use this filter to squeeze or inflate images. Apply a percentage for different effects.

   This works in a similar way to pinch. Use to rotate the image (or a selection) around a central point in the frame.

Noise Filters
   Use the Add Noise filter to add a grain like pattern. This is useful when applied subtly to remove the purity and sharpness of digital images, or to give the impression a grain. Tick the monochromatic option to avoid any unwanted specks of color noise being seen. The Texture filters menu also has a Grain filter that has several interesting styles of grain and interference. However, it does not have monochrome option, making the grain look too colorful, though it is very effective for images converted to Grayscale, which can later be turned back to RGB.

Lens correction

Tuesday, September 11, 2012

Photoshop: Select Menu

Further modification to the selection can be made in the Select Menu. Try the difference and use what fits your needs.

  • Inverse. Use this to invert a selection. This is particularly helpful for cutting out objects from the background. Make your initial selection around the object, and then choose Inverse.
  • Feather. To change the rate of feathering, click on Feather. This is very handy if the edge of the selection is not soft enough.
  • Save Selection. If a selection need to be used again, save it with Save Selection, and then name it. recall it with load selection.
  • Deselect and Reselect. To remove a selection temporarily, choose Deselect. Reinstate it with Reselect. It is also possible to move a selection within the image by clicking inside the selection and dragging it.
  • Modify Border. Use this control to change the selection from being shape to a selected border around the previous selection. Use it for making your own border effects.
  • Modify: Smooth. Use Smooth to remove some of the roughness of a selection and give it a smoother edge.
  • Modify: Expand and Contrast. Sometimes, it is useful to make a selection slightly larger or smaller. To do this, add or remove pixels using either of these two commands.
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