Four modules carry the main Calibration Flow workflow: Target to generate what you'll expose, Curve to analyze and correct, Negative to produce the file you'll print, Library to keep track of your work. Around these four modules, smaller tools do the quiet work that makes the rest usable — a loupe when the screen isn't enough, a classifier that adapts the auto-correction to the image's intent, a timer for exposures, an account that follows you across your devices.

This section documents those cross-cutting tools. Each page describes what the tool does for you, when it kicks in, and how it fits into your practice. Most of these tools are automatic — you don't switch them on, they're there when you need them.

#What you'll find here

Nine tools, each with its own page:

Histogram loupe — a circle in the top right of the screen that magnifies the histogram graph area around your cursor. To target a point pixel-accurately when you read the histogram or adjust a threshold.
Smart Analyzer — classifies each imported image by its tonal mood (Low Key, High Key, Charcoal, Soft Mist…) and adapts the auto-correction strategy accordingly. Invisible, automatic.
L* histogram — the tonal distribution of your image, plotted in perceptual luminance, with a fullscreen mode for fine inspections.
Pro Mode — unlocks a more precise analysis pipeline, advanced color controls and extended quotas (5 GB cloud, unlimited curves). Single subscription at €9.90/month on web and iOS, or 1 year included with a Luminograph.
Color Venn — generates a printable calibration target made of three overlapping Cyan, Magenta, Yellow circles. To calibrate Aquaprint CMYK and Charcoal tricolor printing. Included in Pro Mode.
Full Gamut — 6- or 7-channel separation that extends the Aquaprint gamut beyond CMYK quadrichromy. Pro Mode only.
Timer dial — a circular dial you set with your finger by dragging. Three precision zones depending on the duration (15 s, 30 s, 60 s), timer or stopwatch modes, parallel multi-timers.
Image formats — what Calibration Flow reads natively (iPhone HEIC, JPEG, PNG, WebP, AVIF) and what isn't implemented yet (RAW). Worth 30 seconds of reading to avoid pointless conversions.
Picturale account — a single account for the ecosystem's four apps (Vision Picturale, Maison Picturale, NOEME, Calibration Flow). Free registration required through the Picturale hub since May 2026.
iScan — tint correction — measures the tint drift between a reference target and your print from a single photo, and builds a tint profile applicable to your images. For Aquaprint four-color and Carbon three-color; useless on monochrome.

#Where to start

You're just starting out. You don't need to touch these tools — most are automatic. The Smart Analyzer runs on import, the loupe appears when you hover over the histogram. The only tool you'll actually have to deal with is the Picturale account if you want syncing across your devices.

You calibrate regularly. Pro Mode starts to be worth the subscription when you work on several processes in parallel or run out of room in the free Mode quota. From five to eight calibrations a month, the €9.90/month subscription pays off.

You do CMYK work. Color Venn is the tool that turns Aquaprint Color calibration into a repeatable process — it generates a target that natively contains the pigment overlaps. This function is included in Pro Mode (and therefore in the 1-year bonus given when you buy a Luminograph).

You expose in a wet environment. The Timer dial is built for this case — finger-set without looking at the screen, haptic vibration at each notch, a mini progress ring always visible in the nav while you handle your sensitized sheets.