Grade every photo to one look

Five of the owner's photos for the site, taken on different days, in different light. Each one is fine on its own. Side by side, they look like five different bakeries. Grading makes them one set, and you can measure it instead of trusting your eye.

Measure two things in every photo. Brightness, from zero to two fifty-five. And warmth, read off something white in the shot, here the baking paper: how much redder than blue it came out. White is zero. The hands at the bench already look right: warm daylight, brightness one ninety-three, warmth plus twenty-seven. That's the house look. Three are far off. The shelf under the shop's lights is cold, minus forty-nine. The loaf at home, under a lamp, is orange, plus a hundred and six. And the counter is dark, at ninety.

Write the house look down as numbers: warmth, brightness one ninety, a soft contrast, and where white sits. Any photo editor has these controls. Here a small script runs the same steps on every file, so no photo gets a slightly different hand. Order matters. First make the paper neutral, which takes out each photo's cast. Then brightness, then contrast. Set the warmth and the white point last, because contrast moves them. Do it the other way round and you can see it. The white drifts from two forty-three to two forty-six, and the warmth slips to between plus twenty-one and plus twenty-four, off the house numbers.

One photo is left alone on purpose. The oven at five in the morning is lit by the oven itself, so it's meant to be dark and orange. It stays as shot, and the grade file says why. An exception with a reason is a decision. Without one, it's an accident.

Then measure again. Four photos at brightness one ninety, warmth between plus twenty-five and plus twenty-eight. The oven, as named. And look at them together, before and after, on one screen. The numbers say they match. Your eye tells you whether the set feels like one morning in one bakery.

Measure first. Fix the outliers to one written grade, in the same order every time, and name every exception with its reason.