Difference between revisions of "Work in progress on histogram redesign"
Prokoudine (talk | contribs) (→Design draft) |
Prokoudine (talk | contribs) (→Design draft) |
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TODO: on-canvas vs. sidebar toggles | TODO: on-canvas vs. sidebar toggles | ||
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TODO: outline view vs filled view for separate channels | TODO: outline view vs filled view for separate channels |
Revision as of 13:44, 8 July 2017
Contents
Problem statement
- Current channel selection options are limiting: one cannot have Blue+Luminance, or just RGB without Value/Luminance.
- Choosing a channel in the histogram dialog requires two clicks: opening a combo box, then choosing a channel.
- The info section of the dialog isn't always necessary, but takes precious vertical space.
- Versions 2.9.x and 2.10 make the histogram dialog design even busier by introducing linear/gamma-corrected switch that has no obvious on/off state (at least, with some UI themes).
Better solutions can be devised, as seen in other software (see 'Tentative design' section).
What should be available
- easily accessible (e.g. on-canvas for the histogram area) switches: R, G, B, Alpha, Value/Luminance/L*, Linear/Log scale, Linear Light / Gamma-Corrected space
- a toggle to show/hide the info section about selected area of the histogram
TODO: We need to decide if we should expose color channels from other color spaces such as CIE LCH. We already expose LCH channels in color selection tools, and exposing LAB / LCH in e.g. Curves tool/filter makes a lot of sense, so this needs a decision.
TODO: Do we stick with Value/Luminance or go for L*?
TODO: Do we really need the file name on top of the histogram? We keep it for the multi-window mode, but dockable dialogs don't use this approach uniformly, so it doesn't look like it's a consistent design decision.
Design draft
TODO: on-canvas vs. sidebar toggles
TODO: toggles design and interaction
TODO: outline view vs filled view for separate channels
TODO: other design considerations?
TODO: enabling info section in the dialog or via dialog menu
Tentative design
darktable
- can display any combination of R, G, and B channels
- always displays L*
- has a linear/log/wavelength switch
- displays basic photography-specific metadata
- allows tweaking blacks and exposure by dragging histogram zones
RawTherapee
- can display any combination of R, G, B, and L* (CIE LAB) channels
- can display chromatic hsitpgram
- has a toggle for raw/processed histogram
- has a linear/log switch
- has an optional narrow panel where it displays values for R/G/B/L* under the mouse pointer
Adobe Photoshop
- Has verbosity toggle in the dialog's menu:
- Compact View (just the histogram, nothing else);
- Expanded View (histogram, channel selection, info section);
- All Channels View (histogram, channel selection, info section, R histogram, G histogram, B histogram).
- Has a toggle to display R, G, or B channels in monochrome mode.
- Displays intensity level under mouse pointer when hovering histogram widget and updates Count respectively. Selecting a portion of the histogram is available as well.
See https://helpx.adobe.com/photoshop/using/viewing-histograms-pixel-values.html for more information.