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Color Adjustments

Adjust image color properties including brightness, contrast, saturation, and gamma correction.

Parameters

brightness

Adjust image brightness levels.

Type: float
Range: -100 to +100
Default: 0 (no adjustment)

contrast

Adjust image contrast levels.

Type: float
Range: -100 to +100
Default: 0 (no adjustment)

saturation

Adjust color saturation intensity.

Type: float
Range: -100 to +100
Default: 0 (no adjustment)

gamma

Apply gamma correction for brightness curve adjustment.

Type: float
Range: 0.1 to 5.0
Default: 1.0 (no correction)

Usage

Individual Adjustments

image.jpg?brightness=20
Increase brightness by 20%.

image.jpg?contrast=30
Increase contrast by 30%.

image.jpg?saturation=-50
Reduce saturation by 50%.

Combined Adjustments

image.jpg?brightness=15&contrast=25&saturation=10
Apply multiple color corrections.

Gamma Correction

image.jpg?gamma=1.8
Apply gamma correction for display optimization.

Color Adjustment Guide

Brightness

  • Positive values (+1 to +100): Lighter, brighter images
  • Negative values (-1 to -100): Darker images
  • Use cases: Correct underexposed photos, create mood

Contrast

  • Positive values (+1 to +100): Increased difference between light and dark areas
  • Negative values (-1 to -100): Reduced contrast, flatter appearance
  • Use cases: Add punch to flat images, soften harsh lighting

Saturation

  • Positive values (+1 to +100): More vivid, intense colors
  • Negative values (-1 to -100): Muted colors, approaching grayscale at -100
  • Use cases: Enhance sunset photos, create vintage looks

Gamma

  • Values < 1.0: Darker midtones, higher contrast
  • Values > 1.0: Brighter midtones, lower contrast
  • Use cases: Display calibration, creative tone mapping

Use Cases

Photo Enhancement

photo.jpg?brightness=10&contrast=20&saturation=15
General photo improvement.

Vintage Effect

image.jpg?brightness=-15&contrast=-20&saturation=-40
Create aged, muted appearance.

High Key Effect

portrait.jpg?brightness=25&contrast=-10&gamma=1.3
Bright, airy portrait style.

Low Key Effect

image.jpg?brightness=-20&contrast=30&gamma=0.8
Dark, dramatic mood.

Web Optimization

image.jpg?brightness=5&contrast=15&saturation=10&auto=format
Enhance for web display with format optimization.

Processing Order

Color adjustments are applied in this sequence: 1. Gamma correction 2. Brightness adjustment
3. Contrast adjustment 4. Saturation adjustment

This order ensures optimal results and predictable behavior.

Best Practices

Natural Enhancement

  • Keep adjustments subtle (±20 range) for natural results
  • Use gamma for overall tone before brightness/contrast
  • Adjust saturation last to fine-tune color intensity

Creative Effects

  • Extreme values (±50 to ±100) for artistic purposes
  • Combine with style effects for complex treatments
  • Test across different image types

Performance

  • Multiple color adjustments are processed efficiently in single pass
  • Results cached at edge for subsequent requests
  • Combine with other parameters for optimal processing

Examples

Landscape Enhancement

landscape.jpg?brightness=8&contrast=22&saturation=12&gamma=1.1

Portrait Correction

portrait.jpg?brightness=12&contrast=8&gamma=1.2

Product Photography

product.jpg?brightness=5&contrast=25&saturation=15

Food Photography

food.jpg?brightness=10&contrast=15&saturation=25&gamma=1.1