Image Histogram & Exposure Analyzer

Analyze image exposure, color distribution, and clipping with real-time gamma correction.

Analyze Image Histograms 📸 Visualize Exposure & Color Balance

Instantly audit the brightness and color distribution of any image. Use this tool to catch exposure errors, data clipping, and subtle color casts in real-time.

💡 Why use this tool?

Don’t trust your monitor alone. This analyzer provides a technical breakdown of your photo's tonal range, showing you exactly where detail is lost in the highlights or shadows—even on uncalibrated screens. It’s built for photographers auditing their shots and web designers ensuring visual consistency across assets.

📘 Pro Tips

  • Spot Data Clipping: Toggle the "Highlight Clipping" feature to identify lost detail. Pixels at absolute black (0) or pure white (255) will flash red, warning you of "clipped" data.
  • Simulate Gamma Shifts: Use the Gamma Correction slider to preview how brightening or darkening mid-tones affects the entire histogram.
  • Isolate Channels: Switch between RGB, individual color channels (Red, Green, Blue), and Luminance to pinpoint specific saturation issues.
  • Standardize Brightness: Monitor the "Mean Luminance" stat to maintain consistent exposure levels across a series of images.

🧐 FAQ

Q. What does a "perfect" histogram look like? A. There is no single "correct" shape. While a well-exposed shot often forms a bell curve in the center, high-key (bright) or low-key (dark) artistic photos will naturally lean toward the edges.

Q. Why use Luminance instead of an RGB average? A. The human eye perceives green as significantly brighter than blue or red. Our Luminance calculation uses the BT.601 formula, weighting colors to match human perception for a more "natural" brightness reading.

Q. Is my image uploaded to a server? A. No. All processing happens locally in your browser. Your images never leave your device.

📚 Technical Insight: Staying Within the Goalposts

In photography, the left and right edges of the graph are the "goalposts." If your data "hits" the right wall, you have "blown highlights" (pure white). If it hits the left wall, you have "crushed shadows" (pure black). Professional cameras provide this live view to help you adjust your shutter speed or aperture before the data is lost forever!