Image Adjustments
1. Introduction
Image adjustments help enhance photographs and graphics by correcting lighting, contrast, and color issues. They are essential for professional photo editing.
- Improves image appearance
- Used in photo editing software
2. Brightness and Contrast
Brightness controls the overall lightness or darkness of an image, while contrast adjusts the difference between light and dark areas.
- Low contrast → dull image
- High contrast → sharper image
3. Levels Adjustment
Levels adjust the tonal range of an image by modifying shadows, midtones, and highlights.
- Input and output levels
- Histogram-based adjustment
4. Auto Levels
Auto levels automatically adjust brightness and contrast based on image histogram.
- Quick correction tool
- May need manual refinement
5. Color Balance
Color balance adjusts the intensity of primary colors to correct color casts in an image.
- Adjust shadows, midtones, highlights
- Fix warm or cool tones
6. Hue and Saturation
Hue changes the actual color, while saturation controls color intensity.
- Increase saturation for vivid colors
- Decrease for muted or grayscale look
7. Curves Adjustment
Curves provide precise control over image tones by adjusting brightness levels across the tonal range.
- Advanced adjustment tool
- Used for professional editing
8. Image Sharpening
Sharpening enhances edge contrast to improve perceived detail in an image.
- Unsharp mask technique
- Avoid over-sharpening
9. Advantages
- Improves visual quality
- Corrects exposure issues
- Enhances colors and details
10. Applications
- Photo editing
- Digital marketing
- Media and publishing
- Web and graphic design
Practice Questions
- What are image adjustments?
- Differentiate brightness and contrast.
- What is levels adjustment?
- Explain hue and saturation.
- Why are curves used?