Histogrammer – Luminance Histogram Tool by BAKAR

Histogrammer

A portable luminance scope for checking exposure, contrast, clipping, and shot matching.

Histogrammer helps artists and visual teams judge image exposure from a selected area of the screen. It shows a live luminance scope, image score, tone distribution, clipping warnings, and reference matching in one clean desktop tool.

Download Histogrammer

Portable Windows app — download and run.

Histogrammer in Guide Mode giving plain-language exposure, contrast, clipping and reference-match feedback
Guide Mode gives a quick read on exposure, contrast, clipping, and reference match.

What it does

Histogrammer measures Rec.709 display luminance from any screen region you choose. It helps answer a simple question: is the image actually exposed well, or does it just look okay on this monitor?

  • Select any region of the screen
  • View a live luminance scope
  • Check exposure, contrast, and clipping
  • Compare against a pinned reference
  • Read tone distribution across blacks, shadows, mids, highs, and whites
  • Use Guide Mode for plain-language feedback
  • Save notes while reviewing images

Features

ROI Capture

Select the exact part of the screen you want to measure.

Luminance Scope

See how the image is distributed from shadows to whites.

Image Score

Get a quick technical read on exposure and contrast.

Guide Mode

Turn dense measurements into clear image feedback.

Reference Match

Compare a shot against a pinned hero or reference image.

Notes

Save review notes while checking images.

Guide Mode

Guide Mode makes the tool easier to read. Instead of only showing numbers, it explains what the image needs: lift exposure, reduce clipping, compress contrast, or keep the shot as-is. Handy for render checks, shot continuity, lookdev, and grading reviews.

Histogrammer technical mode showing the luminance scope, image metrics, tone distribution, ROI preview and reference match
Technical mode shows the full scope, image metrics, tone distribution, ROI preview, and reference match.

How to use

  1. Open Histogrammer.
  2. Select a region of your screen.
  3. Read the scope and image score.
  4. Pin a reference if you want to compare shots.
  5. Use Guide Mode when you want faster feedback.

Design

The interface is designed to feel like a practical measuring instrument: clean panels, readable controls, subtle texture, calibrated red markers, and a focused dark scope area.

It is meant to support visual judgement, not replace it.

Download

Download the portable Windows version and run Histogrammer.exe. No installer, no account.

Download Histogrammer

Keep Histogrammer.exe in its own folder so its notes and exports save alongside it.

BAKAR