A photo's noise is as large as the step from one palette colour to the next, so noise decided pixel by pixel
which of two neighbouring colours a pixel got: tens of thousands of specks, or (since the palette change)
neighbouring tones merged into one.
- A continuous-tone image (eight colours leave much of it unsaid; flat art, however noisy or unevenly lit, is
not one) is smoothed before it is quantised: three rounds of a small bilateral filter, which averages noise
away within a tone and keeps the edges between tones where and as sharp as they were.
- With Method: Overlapping, layers are stacked by lightness, from the largest colour's end of the scale,
instead of by area. Each layer reaches under those above it, so where two colours meet every layer between
them in the stack ends on that same edge and shows through its anti-aliasing: by area that was an unrelated
colour's hairline around every region; by lightness it is a neighbouring tone.
- Ignore White with Overlapping: no layer reaches under the white that is left out.
On each preset's own inputs, all sizes and variants (docs/image-trace-quality.md), before -> after:
- High Fidelity Photo: colour error 2.37 -> 1.75 (2.30 at the baseline), edge error 2.59 -> 1.98, 639 -> 121
paths (3,653 at the baseline), 25,604 -> 9,818 anchors, specks 152 -> 10; a 16 megapixel photo-like image is
traced in 3.5 s (31,131 paths) where it was refused
- Low Fidelity Photo: colour error 2.67 -> 2.45, 55 -> 37 paths
- Shades of Gray: 73 -> 17 paths, colour error 9.33 -> 9.26
- The other presets' numbers are unchanged
egui reports drag_started only once the pointer is past its drag
threshold, farther from the press than the ruler's 5 px hit tolerance,
so hit-testing the current pointer usually missed the stop. Hit-test the
press origin instead, falling back to the pointer position.
Fixes#1458
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The theme's widget fill matches the dialog background, so the sliders of
Save for Web, the raster export options, Preferences and the opacity
popup showed only their handle. They share one slider widget now, with a
visible rail filled up to the handle.
In Outline view a template layer drew as outlines like any other, so a
picture placed to be traced turned into a box. It now keeps drawing in
Preview (dimmed as before) while the other layers are in outline.
Color and Grayscale chose their colours from every pixel, so the blends along anti-aliased edges took palette
entries and traced as slivers, and with more colours asked for than the art has, k-means split flat colours
along their noise and the halves traced as specks all over each other.
- The palette is made from the picture's own colours: a pixel that lies between the pixels on opposite sides
of it is a blend and counts for nothing (lines one pixel wide and noise are no blends).
- Colours that noise made of one colour merge: close colours whose pixels are mixed through each other. The
bands of a gradient keep to themselves and stay apart.
- A blend pixel whose nearest palette colour is a third colour (halfway from navy to yellow lies an olive that
is nearer to a green elsewhere) goes to the nearer of the two colours it lies between.
- Boxes are cut where their two sides differ most (Otsu's criterion) instead of at the median, which split the
largest colour of flat art along its noise and left two smaller colours in one box.
- Colours are compared in Oklab when pixels are assigned and in k-means.
On each preset's own inputs, all sizes and variants (docs/image-trace-quality.md), before -> after:
- 16 Colors: 69.9 -> 4.2 paths, 1743 -> 66 anchors, outlines 5.08 -> 0.13 px off on average (largest 85.9 ->
1.09), kinks 1376 -> 4.4, paths in a colour the art doesn't have 5.9 -> 0
- 6 Colors: 21.2 -> 4.0 paths, 4.44 -> 0.14 px off; 3 Colors: colour error 4.86 -> 0.43, 0.33 -> 0.09 px off
- High Fidelity Photo: 3636 -> 639 paths, 81,597 -> 25,604 anchors, colour error 2.50 -> 2.37; a 1 megapixel
photo-like image 1.98 -> 0.42 s (51,389 -> 4,298 paths), a 4 megapixel one traced (27,583 paths) where it was
refused
- Low Fidelity Photo: 128 -> 55 paths, colour error 2.59 -> 2.67; Shades of Gray: 91 -> 73 paths, 9.29 -> 9.33
text.create, text.createInPath, text.setText and text.setStyle answer with
overflow: [id…] for the area type and type on a path whose text doesn't fit (left
out when all fits), and MCP add_text with overflow: true. add_text takes area
type's fit and fitMinPercent.
A point outside the grid can be nearer an edge further along the grid's side than one
straight ahead of it; the search stopped a ring early there. The bucket lookup is one
function.
One message translated when #1302 was merged addressed the user with
the formal verb form ("csatolja"); the catalog uses the informal second
person throughout ("csatold").
Extrude & Bevel, Inflate and Rotate sampled every curve at sixteen points and
refused a shape past 1,024 points, about 64 curves: outlined words reached
that quickly, and Rotate refused them although it only turns the outline.
- Each curve takes as many straight pieces as keep it within 1/2000 of the
shape's size (at least 0.05 pt), by Wang's bound: 1 to 32.
- Extrude & Bevel and Inflate take up to 2,048 points, Rotate 65,536.
- Inflate's distance and crossing tests use a bucketed edge index, and
cells no edge crosses skip clipping: about 80 ms at 2,000 points (it was
over 600 ms with the old search; 95 ms at the old 1,024-point limit).
Revolve's own sampling is unchanged.
Selected text in a numeric or text field was drawn in the accent colour on the accent-tinted
selection, in every brightness. The fields that draw their own frame (panel and Control bar fields,
dialog fields, the hex field) now draw it in the strong text colour.
File > Place, Relink and Open refused a grayscale TIFF whose pixels carry an alpha channel or
another extra channel: the image decoder reads neither. They are now read like CMYK TIFFs with
alpha: the first extra sample is the transparency when the file says it is alpha (associated alpha
divided back out), and other channels are left out.
Object > Path > Split Into Grid took a number of rows and columns and one gutter, and split each
selected path on its own. The dialog now has the documented options, the rows beside the columns:
number, height or width, gutter and total, with Add Guides and Preview. Several selected paths
become one grid over them all, painted as the topmost one, as documented.
object.path.splitIntoGrid takes rowGutter and columnGutter (gutter still sets both), totalHeight
and totalWidth, height and width (the size of each row and column, which sets the total) and
addGuides, which adds ruler guides along the row and column edges on the grid's layer.
Behaviour reference:
https://helpx.adobe.com/illustrator/desktop/manage-objects/edit-objects/divide-or-split-objects.html
On each pointer move of an Alt-drag with the Selection, Direct
Selection, Group Selection, Rotate, Scale, Reflect or Shear tool,
Session::preview put the drag's snapshot back and ran object.transform
with copy again, and duplicate_in copied every selected object again.
The Move, Rotate, Scale, Reflect and Shear dialogs with Copy and Preview
on copied every selected object again on each change of a value.
The interaction now keeps the untransformed copies that its first
preview with copy makes of the snapshot. Each later preview that
copies the same objects of the same snapshot transforms only those
copies. The copies keep their ids, and the document, the selection,
the undo step and the journal are the same as before. With 25,000
rectangles selected, a release build of vectorcraft-cli took a median
of 138.5 ms for each Alt-drag move after the first preview and takes
105.7 ms with this change.
Docs: docs/target-app-parity.md.
Adds 127 Czech entries the Hungarian/Spanish/German catalogs already
have: tool short names, recolor and swatch library labels, print/PDF
preset names and their differences lines, pie graph options, counts
and the about-box credits. "Reset <workspace>" entries keep the
built-in workspace names in English as MENU_KEEP_AS_IS requires.
Also [Default] -> [Výchozí] in the protected-preset hint, matching the
existing [Default] entry.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Each crack between an inside and an outside pixel is moved to where the pixels across it say the edge is (the
blend of the two tones in the column of pixels across the crack; a thin line by the centroid and sum of its
tone; hard-edged images are read as staircases), and the outline is fitted as Flat Logo mode fits its own:
corners put back, straight runs as lines, a round outline as a circle, the rest as few curves as Paths allows.
Snap Curves To Lines straightens slightly curved runs and makes arcs. A fit that strays from its outline
gives way to a plainer one, and at last to the outline's own points.
On each preset's own inputs, all sizes and variants (docs/image-trace-quality.md):
- Default: outlines 0.313 -> 0.091 px off on average, largest 1.51 -> 1.02; edge error 17.2 -> 10.1;
gaps between abutting paths 63.5 -> 22.2 px, overlaps 67.0 -> 22.4 px
- Black and White Logo: 0.270 -> 0.064 px off, kinks 15.3 -> 0.3, anchors 3.78 -> 2.73 times the art's
- Technical Drawing: 0.201 -> 0.086 px off; Line Art: 0.158 -> 0.093
- Worse: anchors on blurred and scanned thin lines (Line Art 25 -> 77 on average), High Fidelity Photo
(colour error 2.30 -> 2.50, anchors 46,866 -> 81,597, 1 megapixel photo-like image 0.37 -> 1.98 s)
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