Histogram & Clipping Inspector
Read the RGB histogram, median luminance, dynamic range and exactly how much is clipped at each end.
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The histogram is computed on linear light and then mapped back for display, with the three channels drawn in additive blending so overlaps read as white — the same convention professional tools use.
Clipping percentages matter more than the shape. Highlights that are already at 255 have lost their information at capture; no amount of editing recovers it, and any subsequent brightening only spreads the flat white further. Knowing the number before you start editing tells you whether a frame is salvageable.