Make a photo clearer without halos

“Clearer” is usually four things at once. A photo can look unclear because it is too dark and flat, because its regions lack local contrast, because its edges are soft, or because grain is breaking up fine texture. The fixes are different and two of them fight each other: sharpening a grainy picture sharpens the grain. So this page opens the Detail panel with the measurements that decide between them — edge energy, edge width and grain — and a loupe that shows the result at the size it will be saved.

The light and colour are corrected first by the same measured pass every page on this site runs, because a dull frame read at 1:1 looks soft whatever its edges are doing. Then clarity is seeded from the frame’s tonal spread. Sharpen is set from the measurement: 35 on a frame whose edges read soft, 20 on one that is already crisp, and less again when the grain is high, because sharpening grain only makes more of it. Noise-safe is already on if the grain measures high enough to matter.

Sharpening runs on brightness only, so colour edges are never amplified into fringes. Clarity adds the same amount to all three colour channels, so it changes contrast without shifting hue. Both are applied by the identical code at preview size and at full size, which is what lets the loupe promise that what it shows is what the file will hold.

The stage at Fit is a downsampled copy, and downsampling hides both halos and grain. The loupe renders one region from the full-resolution result, beside the same region of the original, at one file pixel per screen pixel (or two, at 2:1). It opens on the busiest patch because that is where over-sharpening shows first: a bright rim along a roofline, a glow around a branch against the sky, speckle in a dark coat. If you see any of those, take Sharpen or Clarity down until they go.

• Sharpening adds contrast at edges; it does not add detail. A photo blurred by motion or missed focus has its detail spread across many pixels, and no amount of edge contrast gathers it back.
• Past the cap, clarity becomes edge haloing at a large radius. The cap is a decision about what this control is for, and it is enforced in the engine as well as on the slider.

What is the difference between clarity and sharpening?

Radius. Clarity compares the picture with a heavily blurred copy of itself and amplifies the difference, so it lifts texture across whole regions — bark, fabric, cloud. Sharpening works at a radius of about one pixel and only acts on edges. Both make a picture look crisper for the first few steps and both go wrong when pushed: clarity draws halos a few per cent of the frame wide, sharpening draws bright rims a pixel wide. That is why they are two controls here, and why clarity stops at 40.

Why is clarity capped at 40?

Past 40 the effect stops reading as local contrast and starts outlining every edge with a glow, which is the over-processed look people complain about in automatic enhancers. The automatic pass never sets it above 14. The cap is enforced in the engine, not just on the slider, so a saved recipe or a typed number cannot get past it either.

Why does the loupe open on a particular part of my photo?

It opens on the busiest patch — the region with the most edge detail, found by summing gradients over a grid of 256-pixel cells. That is where sharpening, clarity and grain are easiest to judge. Drag either pane, or focus it and use the arrow keys, to look anywhere else; 2:1 doubles the magnification.

Is the loupe showing the real result?

Yes. The after pane is cropped from the full-resolution render — the same pixels the save button writes — not from the downsampled preview the stage shows at Fit. When the full-size render is still being made after a change, the loupe says so instead of showing something stale.

Can it make a blurry photo clear?

Only a slightly soft one, and only up to a point. Sharpening and clarity raise contrast where detail exists; they cannot put back detail that motion or missed focus spread across many pixels. The quality report prints the measured edge width so you can see which case you are in.

• Improve image qualityA quality report first: grain, JPEG quality, blocking, edge energy, clipping and resolution, each with its fix.
• AI photo enhancer, on your deviceThe measured pass first, then local models for 2× detail — download size shown before anything is fetched.
• Shot in a dim roomOpens on the low-light starting point: shadows well open, contrast held back.
• Clarity and sharpening solve different problemsSeparate midtone local contrast from edge acutance before enhancing a photograph.