COMPUTER SCIENCE 2.pptx Basic Concepts in Photo Editing

Computer Science

1. Grade Level: Grade 8 (Advanced Subject) Subject: Computer Science 2

2. Objective: Explore and examine the basic concepts and underlying principles of Photo Editing specifically using the Adobe Photoshop

3. Explain basic concepts in Photo Editing 1. Resolution and Image Size Resolution : The number of pixels in an image, typically measured in pixels per inch (PPI). Higher resolution means more detail. Image Size : The dimensions of an image, usually measured in pixels, inches, or centimeters.

4. Explain basic concepts in Photo Editing 2. Layers Definition : Layers are like transparent sheets stacked on top of each other. Each layer can hold different elements of an image. Importance : They allow non-destructive editing, meaning changes can be made without permanently altering the original image. Types : Background Layer : The base layer of an image. Adjustment Layers : Apply color and tonal adjustments without altering the original image.

5. Explain basic concepts in Photo Editing 3. Selection Tools Purpose : To isolate specific parts of an image for editing. Common Tools : Marquee Tools : Rectangular and elliptical selections. Lasso Tools : Freehand selections. Magic Wand : Selects areas of similar color. Quick Selection Tool : Automatically finds and follows defined edges in the image.

6. Explain basic concepts in Photo Editing 4. Transformations Definition : Alterations to the size, shape, and orientation of an image or a part of an image. Common Transformations : Scale : Change the size. Rotate : Turn the image around a fixed point. Skew and Distort : Stretch and twist the image. Free Transform : A combination of all transformations.

7. Explain basic concepts in Photo Editing 5. Cropping and Resizing Cropping : Cutting out unwanted parts of an image to improve composition or focus on a particular subject. Resizing : Changing the dimensions of an image, which can affect resolution.

8. Explain basic concepts in Photo Editing 6. Color Correction and Adjustment Purpose : To improve the overall appearance of an image or achieve a particular look. Common Adjustments : Brightness/Contrast : Adjusts the lightness and darkness. Levels : Adjusts the intensity levels of shadows, midtones , and highlights. Curves : More advanced adjustment of brightness and contrast. Hue/Saturation : Changes the colors and their intensity. Color Balance : Adjusts the colors to correct for lighting conditions.

9. Explain basic concepts in Photo Editing 7. Retouching Tools Purpose : To correct or enhance specific parts of an image. Common Tools : Clone Stamp : Copies pixels from one part of an image to another. Healing Brush : Blends copied pixels with the surrounding area. Patch Tool : Repairs a selected area with pixels from another area or a pattern. Spot Healing Brush : Automatically samples surrounding pixels to remove blemishes and imperfections.

10. Explain basic concepts in Photo Editing 8. Filters and Effects Filters : Predefined adjustments that can be applied to an image to achieve various effects (e.g., blur, sharpen, noise reduction). Effects : Additional enhancements such as drop shadows, glows, and textures.

11. Explain basic concepts in Photo Editing 9. Masking Definition : Using masks to hide or reveal parts of a layer. Types : Layer Masks : Allow parts of a layer to be hidden without deleting them. Clipping Masks : Use the content of one layer to mask the layers above it.

12. Explain basic concepts in Photo Editing 10. File Formats JPEG : Commonly used for photographs; lossy compression reduces file size but can decrease quality. PNG : Supports transparency; lossless compression maintains quality. TIFF : High-quality format often used for printing; supports layers. PSD : Photoshop's native format; retains layers and all editing information.