dtourolle
2e9a1eb0f0
dr_ui::merge is the orchestration with no interface in it: decode each frame to sensor data and build its graph as a session would (orientation, lens profile); render each through the camera-space tap at proxy size and detect keypoints there, so the alignment is measured in the undistorted frame the tiles are rendered in; align; solve one gain per frame from the proxies' overlaps; draw the aligned set in colour for the page; then wait. Nothing is written until a Decision arrives (FR-MRG-1). The merge writes a linear DNG through the outbox with a destination record, so the drain puts it beside its sources on a folder library and a server alike, and the library rescans (FR-MRG-3). merge.slint is the page, on the import page's model: the alignment table with a failed frame named on its row and the button held off (FR-MRG-5), the preview, the projection choice, Stop and Back. A "Merge to panorama" button joins the grid's selection bar at two frames. Headless, the example produces the fixture's 22 993 x 5 980 DNG in 45 s on the reference desktop, exposures balanced across the stop of drift.
736 lines
27 KiB
Rust
736 lines
27 KiB
Rust
//! TRACES: FR-MRG-1 | FR-MRG-2 | FR-MRG-3 | FR-MRG-5 | FR-MRG-7
|
||
//! The merge job: from a set of files to a linear DNG beside them.
|
||
//!
|
||
//! The orchestration of a panorama, with no interface types in it: it runs
|
||
//! on a thread of its own and reports through a channel, on the pattern
|
||
//! [`crate::export`]'s batch established (FR-MRG-7). The interface drains
|
||
//! the channel from a timer; a headless example drains it from a loop.
|
||
//!
|
||
//! # Stages
|
||
//!
|
||
//! 1. **Load.** Each file is read and decoded to sensor data, and its edit
|
||
//! graph built the way a session would — orientation, lens profile —
|
||
//! because those are the two things the camera-space tap uses
|
||
//! (FR-MRG-2).
|
||
//! 2. **Proxies.** Each frame is demosaiced and rendered through the tap
|
||
//! at proxy size, upright; the keypoint detector reads that.
|
||
//! 3. **Alignment.** `dr_pano::align`. A frame it could not place stops
|
||
//! the job with the frame named (FR-MRG-5).
|
||
//! 4. **Gain.** One scalar per frame from the proxies' overlaps, so the
|
||
//! stop of exposure drift a hand-held sweep collects does not band.
|
||
//! 5. **Merge.** `dr_gpu::MergePass`, chunk by chunk, into a DNG written
|
||
//! strip by strip beside the first source (FR-MRG-3).
|
||
//!
|
||
//! The demosaiced frames are the memory: 160 MB each at f16 for a 20 MP
|
||
//! body, so at most two are resident and the rest are demosaiced again
|
||
//! when a band needs them. That is the trade FR-MRG-11 asks for — the
|
||
//! sensor data stays on the CPU at a fifth of the size — and it is what
|
||
//! makes a twelve-frame set fit.
|
||
|
||
use std::collections::VecDeque;
|
||
use std::path::{Path, PathBuf};
|
||
use std::sync::mpsc::{Receiver, Sender};
|
||
use std::sync::Arc;
|
||
use std::time::Instant;
|
||
|
||
use dr_decode::RawImage;
|
||
use dr_gpu::{AdjustPass, DemosaicedImage, Demosaicer, GpuContext, MergeFrame, MergeOutput, MergePass};
|
||
use dr_pano::bundle::Cameras;
|
||
use dr_pano::projection::{self, Projection};
|
||
use dr_pano::{Alignment, Gray};
|
||
use dr_pipeline::EditGraph;
|
||
|
||
pub use crate::export::Cancel;
|
||
|
||
/// One frame as the job receives it: the file's bytes, already fetched,
|
||
/// and a name for messages and for the composite's own name.
|
||
#[derive(Debug, Clone)]
|
||
pub struct MergeInput {
|
||
/// The file's name, `_MG_8320.CR2`.
|
||
pub name: String,
|
||
pub bytes: Arc<Vec<u8>>,
|
||
}
|
||
|
||
impl MergeInput {
|
||
pub fn read(path: &Path) -> Result<Self, String> {
|
||
Ok(MergeInput {
|
||
name: path
|
||
.file_name()
|
||
.map(|n| n.to_string_lossy().into_owned())
|
||
.unwrap_or_else(|| "frame".into()),
|
||
bytes: Arc::new(std::fs::read(path).map_err(|e| format!("{}: {e}", path.display()))?),
|
||
})
|
||
}
|
||
}
|
||
|
||
/// Where the composite goes (FR-MRG-3).
|
||
#[derive(Debug, Clone)]
|
||
pub enum MergeDestination {
|
||
/// A folder on this device: written there directly.
|
||
Local(PathBuf),
|
||
/// Beside its sources in the library, through the export outbox: the
|
||
/// file is staged with a destination record and the drain uploads it —
|
||
/// the one path that works for a folder library and a server alike, and
|
||
/// the one FR-MRG-3 names for a folder the job cannot write itself.
|
||
Outbox {
|
||
outbox: PathBuf,
|
||
/// The sources' folder, relative to the library root.
|
||
remote_dir: String,
|
||
},
|
||
}
|
||
|
||
/// What the job is told.
|
||
#[derive(Debug, Clone)]
|
||
pub struct MergeRequest {
|
||
/// The frames, in capture order.
|
||
pub frames: Vec<MergeInput>,
|
||
pub destination: MergeDestination,
|
||
/// `None` for the projection the field of view suggests.
|
||
pub projection: Option<Projection>,
|
||
/// Pixels over which a frame's weight ramps up from its edge.
|
||
pub feather_px: f32,
|
||
/// GPU work unit; also the DNG strip height.
|
||
pub chunk: (u32, u32),
|
||
}
|
||
|
||
impl MergeRequest {
|
||
pub fn new(frames: Vec<MergeInput>, destination: MergeDestination) -> Self {
|
||
MergeRequest {
|
||
frames,
|
||
destination,
|
||
projection: None,
|
||
feather_px: 200.0,
|
||
chunk: (2048, 512),
|
||
}
|
||
}
|
||
}
|
||
|
||
/// What the photographer decides once the alignment is shown (FR-MRG-1:
|
||
/// never automatic).
|
||
#[derive(Debug, Clone, Copy, PartialEq)]
|
||
pub enum Decision {
|
||
Merge { projection: Option<Projection> },
|
||
Abandon,
|
||
}
|
||
|
||
/// What the job says while it runs.
|
||
#[derive(Debug, Clone)]
|
||
pub enum MergeEvent {
|
||
/// A stage, with progress within it.
|
||
Progress {
|
||
stage: &'static str,
|
||
done: usize,
|
||
total: usize,
|
||
},
|
||
/// The alignment, before any pixel is written: what the interface shows
|
||
/// for the photographer to confirm, and what names a failure.
|
||
Aligned(AlignmentReport),
|
||
/// The composite is written: on the device at `path`, or staged in the
|
||
/// outbox for the drain to upload, in which case `staged` is true and
|
||
/// the library learns of it when the folder is next scanned.
|
||
Done {
|
||
path: PathBuf,
|
||
staged: bool,
|
||
width: u32,
|
||
height: u32,
|
||
},
|
||
Failed(String),
|
||
Cancelled,
|
||
}
|
||
|
||
/// The alignment, described for a panel.
|
||
#[derive(Debug, Clone)]
|
||
pub struct AlignmentReport {
|
||
/// Equivalent focal length in millimetres on full frame, from the fit.
|
||
pub focal_mm: f64,
|
||
pub rms_px: f64,
|
||
pub projection: Projection,
|
||
pub width: u32,
|
||
pub height: u32,
|
||
/// Per frame, in input order: yaw and pitch in degrees if aligned, or
|
||
/// why not.
|
||
pub frames: Vec<Result<(f64, f64), String>>,
|
||
pub links: usize,
|
||
/// The aligned set drawn on the suggested surface at proxy resolution,
|
||
/// `(width, height, rgba)` — what the photographer confirms.
|
||
pub preview: Option<(u32, u32, Vec<u8>)>,
|
||
}
|
||
|
||
/// Run the whole job on the calling thread, reporting on `events`.
|
||
///
|
||
/// After `Aligned` the job waits on `decision` — the photographer's
|
||
/// confirmation, or the headless caller's immediate `Merge` — and returns
|
||
/// when the file is written, the job failed, or `cancel` was seen.
|
||
pub fn run(
|
||
ctx: GpuContext,
|
||
request: MergeRequest,
|
||
events: Sender<MergeEvent>,
|
||
decision: Receiver<Decision>,
|
||
cancel: Cancel,
|
||
) {
|
||
let send = |e: MergeEvent| {
|
||
let _ = events.send(e);
|
||
};
|
||
match run_inner(&ctx, &request, &events, &decision, &cancel) {
|
||
Ok(Some(done)) => send(done),
|
||
Ok(None) => send(MergeEvent::Cancelled),
|
||
Err(e) => send(MergeEvent::Failed(e)),
|
||
}
|
||
}
|
||
|
||
/// The frames as loaded: sensor data on the CPU and the graph the tap uses.
|
||
struct Loaded {
|
||
raw: RawImage,
|
||
meta: dr_decode::Metadata,
|
||
graph: Arc<EditGraph>,
|
||
/// The upright size, which is what the cameras are in.
|
||
size: (u32, u32),
|
||
}
|
||
|
||
fn run_inner(
|
||
ctx: &GpuContext,
|
||
request: &MergeRequest,
|
||
events: &Sender<MergeEvent>,
|
||
decision: &Receiver<Decision>,
|
||
cancel: &Cancel,
|
||
) -> Result<Option<MergeEvent>, String> {
|
||
if request.frames.len() < 2 {
|
||
return Err("a panorama needs at least two frames".into());
|
||
}
|
||
let progress = |stage: &'static str, done: usize, total: usize| {
|
||
let _ = events.send(MergeEvent::Progress { stage, done, total });
|
||
};
|
||
|
||
// 1. Load.
|
||
let t = Instant::now();
|
||
let mut frames: Vec<Loaded> = Vec::with_capacity(request.frames.len());
|
||
for (i, input) in request.frames.iter().enumerate() {
|
||
if cancel.is_cancelled() {
|
||
return Ok(None);
|
||
}
|
||
progress("Reading", i, request.frames.len());
|
||
let bytes = &input.bytes;
|
||
let meta = dr_decode::metadata(bytes).unwrap_or_default();
|
||
let raw = dr_decode::decode(bytes).map_err(|e| format!("{}: {e}", input.name))?;
|
||
let orientation = meta.orientation.unwrap_or_default();
|
||
let mut graph = EditGraph::default_chain();
|
||
graph.set_orientation(orientation);
|
||
graph.set_lens_profile(crate::develop::DevelopSession::profile_for(&meta));
|
||
let (w, h) = (raw.crop.width, raw.crop.height);
|
||
let size = if orientation.quarter_turns % 2 == 1 { (h, w) } else { (w, h) };
|
||
frames.push(Loaded {
|
||
raw,
|
||
meta,
|
||
graph: Arc::new(graph),
|
||
size,
|
||
});
|
||
}
|
||
log::info!("merge: {} frames read in {:?}", frames.len(), t.elapsed());
|
||
|
||
// 2. Proxies and keypoints.
|
||
let t = Instant::now();
|
||
let demosaicer = Demosaicer::new(ctx).map_err(|e| e.to_string())?;
|
||
let mut adjust = AdjustPass::new(ctx);
|
||
let mut detector = dr_pano::xfeat::XFeat::embedded().map_err(|e| e.to_string())?;
|
||
let mut features = Vec::with_capacity(frames.len());
|
||
let mut proxies: Vec<Gray> = Vec::with_capacity(frames.len());
|
||
let mut colour: Vec<Vec<f32>> = Vec::with_capacity(frames.len());
|
||
for (i, f) in frames.iter().enumerate() {
|
||
if cancel.is_cancelled() {
|
||
return Ok(None);
|
||
}
|
||
progress("Finding features", i, frames.len());
|
||
let image = demosaicer.run(&f.raw).map_err(|e| e.to_string())?;
|
||
let (proxy, rgb) = camera_proxy(&mut adjust, &image, &f.graph, f.size)?;
|
||
features.push(detector.detect(&proxy).map_err(|e| e.to_string())?);
|
||
proxies.push(proxy);
|
||
colour.push(rgb);
|
||
}
|
||
log::info!("merge: features in {:?}", t.elapsed());
|
||
|
||
// 3. Alignment.
|
||
let t = Instant::now();
|
||
progress("Aligning", 0, 1);
|
||
let alignment = dr_pano::align(&features, &dr_pano::AlignOptions::default())
|
||
.map_err(|e| e.to_string())?;
|
||
log::info!(
|
||
"merge: aligned in {:?}, focal {:.1} px, rms {:.2} px, {} links",
|
||
t.elapsed(),
|
||
alignment.focal,
|
||
alignment.rms_px,
|
||
alignment.links.len()
|
||
);
|
||
|
||
// The geometry at full resolution: the proxy's long edge against the
|
||
// frame's.
|
||
let proxy_long = proxies[0].width.max(proxies[0].height) as f64;
|
||
let full_long = frames[0].size.0.max(frames[0].size.1) as f64;
|
||
let focal_full = alignment.focal * full_long / proxy_long;
|
||
let cameras = Cameras {
|
||
rotations: alignment
|
||
.rotations
|
||
.iter()
|
||
.map(|r| r.unwrap_or(dr_pano::linalg::Mat3::IDENTITY))
|
||
.collect(),
|
||
focal: focal_full,
|
||
};
|
||
let frame_size = (frames[0].size.0 as f64, frames[0].size.1 as f64);
|
||
let (hfov, vfov) = field_of_view(&cameras, frame_size);
|
||
let projection = request
|
||
.projection
|
||
.unwrap_or_else(|| Projection::suggest(hfov, vfov));
|
||
let bounds = projection::bounds(projection, focal_full, &cameras, frame_size)
|
||
.ok_or("the frames project nowhere")?;
|
||
|
||
// 4. Gains, before the report so the preview shows them.
|
||
let gains = if alignment.is_complete() {
|
||
gains(&proxies, &alignment)
|
||
} else {
|
||
vec![1.0; frames.len()]
|
||
};
|
||
let preview = if alignment.is_complete() {
|
||
progress("Drawing the preview", 0, 1);
|
||
Some(preview(&colour, &proxies, &alignment, &gains, projection, &frames[0].raw))
|
||
} else {
|
||
None
|
||
};
|
||
let report = AlignmentReport {
|
||
focal_mm: focal_full * 36.0 / full_long,
|
||
rms_px: alignment.rms_px,
|
||
projection,
|
||
width: bounds.width().ceil() as u32,
|
||
height: bounds.height().ceil() as u32,
|
||
frames: describe(&alignment),
|
||
links: alignment.links.len(),
|
||
preview,
|
||
};
|
||
let _ = events.send(MergeEvent::Aligned(report));
|
||
if !alignment.is_complete() {
|
||
let names: Vec<String> = alignment
|
||
.unaligned
|
||
.iter()
|
||
.map(|(k, why)| format!("{}: {why}", request.frames[*k].name))
|
||
.collect();
|
||
return Err(format!("not every frame could be placed — {}", names.join("; ")));
|
||
}
|
||
|
||
// Never automatic (FR-MRG-1): nothing is written until the alignment
|
||
// has been seen and confirmed. Polled, so a cancel while waiting is
|
||
// seen within a moment.
|
||
let projection = loop {
|
||
if cancel.is_cancelled() {
|
||
return Ok(None);
|
||
}
|
||
match decision.recv_timeout(std::time::Duration::from_millis(100)) {
|
||
Ok(Decision::Merge { projection: p }) => break p.unwrap_or(projection),
|
||
Ok(Decision::Abandon) => return Ok(None),
|
||
Err(std::sync::mpsc::RecvTimeoutError::Timeout) => continue,
|
||
Err(std::sync::mpsc::RecvTimeoutError::Disconnected) => return Ok(None),
|
||
}
|
||
};
|
||
let bounds = projection::bounds(projection, focal_full, &cameras, frame_size)
|
||
.ok_or("the frames project nowhere")?;
|
||
|
||
// 5. Merge, into a DNG beside the first frame.
|
||
let name = format!("{}-pano.dng", stem(Path::new(&request.frames[0].name)));
|
||
let (out_path, staged) = match &request.destination {
|
||
MergeDestination::Local(dir) => (unused_name(dir, &name), false),
|
||
MergeDestination::Outbox { outbox, remote_dir } => {
|
||
std::fs::create_dir_all(outbox).map_err(|e| format!("{}: {e}", outbox.display()))?;
|
||
let path = unused_name(outbox, &name);
|
||
// The record first here, unlike an export: the payload is
|
||
// written over minutes and a record naming a half-written file
|
||
// is worse than a payload with no record, so the record is
|
||
// removed again if the merge fails. The drain skips payloads
|
||
// without records.
|
||
let record = crate::export::destination_record(&path);
|
||
let final_name = path
|
||
.file_name()
|
||
.map(|n| n.to_string_lossy().into_owned())
|
||
.unwrap_or(name.clone());
|
||
std::fs::write(&record, format!("{remote_dir}\n{final_name}\n"))
|
||
.map_err(|e| format!("{}: {e}", record.display()))?;
|
||
(path, true)
|
||
}
|
||
};
|
||
let cleanup = |path: &Path| {
|
||
let _ = std::fs::remove_file(path);
|
||
if staged {
|
||
let _ = std::fs::remove_file(crate::export::destination_record(path));
|
||
}
|
||
};
|
||
let (out_w, out_h) = (report_size(&bounds).0, report_size(&bounds).1);
|
||
let first = &frames[0];
|
||
let black = first.raw.black_level[0];
|
||
let white_level = u32::from(first.raw.white_level.saturating_sub(black)).max(1);
|
||
let profile = dng_profile(first, white_level);
|
||
let (_, carried) = crate::export::header_for_file(&first.meta);
|
||
|
||
let output = MergeOutput {
|
||
projection,
|
||
scale: focal_full,
|
||
bounds,
|
||
feather: request.feather_px,
|
||
chunk: request.chunk,
|
||
sample_scale: white_level as f32,
|
||
};
|
||
let merge_frames: Vec<MergeFrame> = frames
|
||
.iter()
|
||
.zip(&gains)
|
||
.map(|(f, &gain)| MergeFrame {
|
||
graph: f.graph.clone(),
|
||
gain,
|
||
})
|
||
.collect();
|
||
|
||
// The writer pulls strips; the merge pushes bands. A channel between
|
||
// them, and the writer on its own thread, so neither waits on the
|
||
// other's pace more than one band.
|
||
let (band_tx, band_rx) = std::sync::mpsc::sync_channel::<Vec<u16>>(1);
|
||
let rows_per_strip = request.chunk.1.max(1);
|
||
let file = std::fs::File::create(&out_path).map_err(|e| format!("{}: {e}", out_path.display()))?;
|
||
let writer = std::thread::spawn(move || -> Result<(), String> {
|
||
let mut file = std::io::BufWriter::new(file);
|
||
dr_export::write_linear_dng(
|
||
&mut file,
|
||
out_w,
|
||
out_h,
|
||
rows_per_strip,
|
||
&profile,
|
||
Some(&carried),
|
||
|_, buf| {
|
||
let band = band_rx
|
||
.recv()
|
||
.map_err(|_| dr_export::ExportError::Encode("the merge stopped early".into()))?;
|
||
buf.extend_from_slice(&band);
|
||
Ok(())
|
||
},
|
||
)
|
||
.map_err(|e| e.to_string())
|
||
});
|
||
|
||
let t = Instant::now();
|
||
let mut pass = MergePass::new(ctx).map_err(|e| e.to_string())?;
|
||
let mut resident: VecDeque<(usize, Arc<DemosaicedImage>)> = VecDeque::new();
|
||
let total_bands = out_h.div_ceil(rows_per_strip) as usize;
|
||
let mut bands_done = 0usize;
|
||
progress("Merging", 0, total_bands);
|
||
let merged = pass.merge(
|
||
&mut adjust,
|
||
&merge_frames,
|
||
&cameras,
|
||
(frames[0].size.0, frames[0].size.1),
|
||
&output,
|
||
|k| {
|
||
if let Some((_, img)) = resident.iter().find(|(i, _)| *i == k) {
|
||
return Ok(img.clone());
|
||
}
|
||
let img = Arc::new(demosaicer.run(&frames[k].raw)?);
|
||
resident.push_back((k, img.clone()));
|
||
while resident.len() > 2 {
|
||
resident.pop_front();
|
||
}
|
||
Ok(img)
|
||
},
|
||
|band| {
|
||
bands_done += 1;
|
||
progress("Merging", bands_done, total_bands);
|
||
band_tx
|
||
.send(band.rgb.to_vec())
|
||
.map_err(|_| dr_gpu::GpuError::Readback("the writer stopped".into()))
|
||
},
|
||
|| cancel.is_cancelled(),
|
||
);
|
||
drop(band_tx);
|
||
let written = writer.join().unwrap_or_else(|_| Err("the writer panicked".into()));
|
||
match merged {
|
||
Ok(()) => {}
|
||
Err(e) if cancel.is_cancelled() => {
|
||
cleanup(&out_path);
|
||
log::info!("merge cancelled: {e}");
|
||
return Ok(None);
|
||
}
|
||
Err(e) => {
|
||
cleanup(&out_path);
|
||
return Err(e.to_string());
|
||
}
|
||
}
|
||
if let Err(e) = written {
|
||
cleanup(&out_path);
|
||
return Err(e);
|
||
}
|
||
log::info!("merge: {}×{} written to {} in {:?}", out_w, out_h, out_path.display(), t.elapsed());
|
||
Ok(Some(MergeEvent::Done {
|
||
path: out_path,
|
||
staged,
|
||
width: out_w,
|
||
height: out_h,
|
||
}))
|
||
}
|
||
|
||
/// The proxy the detector reads: the frame through the camera-space tap at
|
||
/// proxy size, upright, as gamma-encoded grey.
|
||
///
|
||
/// Through the tap rather than the embedded preview so that the keypoints
|
||
/// are in the *undistorted* frame the tiles will be rendered in — a lens
|
||
/// profile moves the corners by tens of pixels at full resolution, and an
|
||
/// alignment measured on the distorted preview would be wrong by that much
|
||
/// at the seams.
|
||
fn camera_proxy(
|
||
adjust: &mut AdjustPass,
|
||
image: &DemosaicedImage,
|
||
graph: &EditGraph,
|
||
upright: (u32, u32),
|
||
) -> Result<(Gray, Vec<f32>), String> {
|
||
let long = dr_pano::xfeat::INPUT_LONG_EDGE as f64;
|
||
let scale = (long / f64::from(upright.0.max(upright.1))).min(1.0);
|
||
let w = ((f64::from(upright.0) * scale).round() as u32).max(1);
|
||
let h = ((f64::from(upright.1) * scale).round() as u32).max(1);
|
||
let shader = graph.compose_camera_linear(dr_pipeline::CropRect::default());
|
||
adjust
|
||
.render_camera_linear(image, &shader, w, h)
|
||
.map_err(|e| e.to_string())?;
|
||
let (rgba, rw, rh) = adjust.read_camera_linear().map_err(|e| e.to_string())?;
|
||
// Camera RGB is unbalanced — green-heavy on every Bayer body — and
|
||
// linear. Luma weights would over-count green further; an equal mean is
|
||
// as good a grey as any for corners and edges, and the gamma is what
|
||
// gives the detector the contrast range it was trained on.
|
||
let data: Vec<f32> = rgba
|
||
.chunks_exact(4)
|
||
.map(|p| ((p[0] + p[1] + p[2]) / 3.0).clamp(0.0, 1.0).powf(1.0 / 2.2))
|
||
.collect();
|
||
let rgb: Vec<f32> = rgba.chunks_exact(4).flat_map(|p| [p[0], p[1], p[2]]).collect();
|
||
Ok((
|
||
Gray {
|
||
width: rw as usize,
|
||
height: rh as usize,
|
||
data,
|
||
},
|
||
rgb,
|
||
))
|
||
}
|
||
|
||
/// The aligned set on its surface, in colour, for the page.
|
||
///
|
||
/// A quick look, not the pipeline: the first frame's white balance and
|
||
/// matrix, a gamma, and the frames averaged where they overlap with their
|
||
/// gains applied. Ghosting here is the alignment's error and banding is
|
||
/// the gains', which is exactly what the photographer is being asked to
|
||
/// look at. Fitted to 1600 px across.
|
||
fn preview(
|
||
colour: &[Vec<f32>],
|
||
proxies: &[Gray],
|
||
alignment: &Alignment,
|
||
gains: &[f32],
|
||
projection: Projection,
|
||
first: &RawImage,
|
||
) -> (u32, u32, Vec<u8>) {
|
||
let cameras = alignment.cameras();
|
||
let (fw, fh) = (proxies[0].width as f64, proxies[0].height as f64);
|
||
let scale = alignment.focal;
|
||
let Some(bounds) = projection::bounds(projection, scale, &cameras, (fw, fh)) else {
|
||
return (0, 0, Vec::new());
|
||
};
|
||
let out_w = 1600usize.min(bounds.width().ceil() as usize).max(1);
|
||
let px = bounds.width() / out_w as f64;
|
||
let out_h = ((bounds.height() / px).ceil() as usize).max(1);
|
||
let wb = first.wb_coeffs;
|
||
let m = first
|
||
.color_matrix
|
||
.unwrap_or([1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 1.0]);
|
||
let mut out = vec![0u8; out_w * out_h * 4];
|
||
for oy in 0..out_h {
|
||
for ox in 0..out_w {
|
||
let u = bounds.min_u + (ox as f64 + 0.5) * px;
|
||
let v = bounds.min_v + (oy as f64 + 0.5) * px;
|
||
let d = projection.to_direction(scale, u, v);
|
||
let mut sum = [0.0f32; 3];
|
||
let mut n = 0u32;
|
||
for (k, g) in proxies.iter().enumerate() {
|
||
let Some((x, y)) = cameras.project(k, d) else { continue };
|
||
let (x, y) = (x + fw / 2.0, y + fh / 2.0);
|
||
if x < 0.0 || y < 0.0 || x >= fw - 1.0 || y >= fh - 1.0 {
|
||
continue;
|
||
}
|
||
let i = (y as usize * g.width + x as usize) * 3;
|
||
for c in 0..3 {
|
||
sum[c] += colour[k][i + c] * gains[k];
|
||
}
|
||
n += 1;
|
||
}
|
||
let o = (oy * out_w + ox) * 4;
|
||
if n == 0 {
|
||
out[o + 3] = 255;
|
||
continue;
|
||
}
|
||
let cam = [sum[0] / n as f32 * wb[0], sum[1] / n as f32 * wb[1], sum[2] / n as f32 * wb[2]];
|
||
for c in 0..3 {
|
||
let lin = m[c * 3] * cam[0] + m[c * 3 + 1] * cam[1] + m[c * 3 + 2] * cam[2];
|
||
out[o + c] = (lin.clamp(0.0, 1.0).powf(1.0 / 2.2) * 255.0) as u8;
|
||
}
|
||
out[o + 3] = 255;
|
||
}
|
||
}
|
||
(out_w as u32, out_h as u32, out)
|
||
}
|
||
|
||
/// The horizontal and vertical field of view the cameras span, in radians:
|
||
/// the angle between the extreme frame centres plus one frame's own field.
|
||
fn field_of_view(cameras: &Cameras, frame: (f64, f64)) -> (f64, f64) {
|
||
let f = cameras.focal;
|
||
let own_h = 2.0 * (frame.0 / (2.0 * f)).atan();
|
||
let own_v = 2.0 * (frame.1 / (2.0 * f)).atan();
|
||
let (mut min_yaw, mut max_yaw, mut min_pitch, mut max_pitch) = (0.0f64, 0.0f64, 0.0f64, 0.0f64);
|
||
for r in &cameras.rotations {
|
||
let d = *r * dr_pano::linalg::Vec3::new(0.0, 0.0, 1.0);
|
||
let yaw = d.x().atan2(d.z());
|
||
let pitch = d.y().asin();
|
||
min_yaw = min_yaw.min(yaw);
|
||
max_yaw = max_yaw.max(yaw);
|
||
min_pitch = min_pitch.min(pitch);
|
||
max_pitch = max_pitch.max(pitch);
|
||
}
|
||
(max_yaw - min_yaw + own_h, max_pitch - min_pitch + own_v)
|
||
}
|
||
|
||
fn report_size(b: &projection::Bounds) -> (u32, u32) {
|
||
(b.width().ceil().max(1.0) as u32, b.height().ceil().max(1.0) as u32)
|
||
}
|
||
|
||
fn describe(a: &Alignment) -> Vec<Result<(f64, f64), String>> {
|
||
a.rotations
|
||
.iter()
|
||
.enumerate()
|
||
.map(|(k, r)| match r {
|
||
Some(r) => {
|
||
let yaw = r.0[0][2].atan2(r.0[2][2]).to_degrees();
|
||
let pitch = (-r.0[1][2]).asin().to_degrees();
|
||
Ok((yaw, pitch))
|
||
}
|
||
None => Err(a
|
||
.unaligned
|
||
.iter()
|
||
.find(|(i, _)| *i == k)
|
||
.map(|(_, why)| why.to_string())
|
||
.unwrap_or_else(|| "not aligned".into())),
|
||
})
|
||
.collect()
|
||
}
|
||
|
||
/// One gain per frame, from the proxies' overlaps.
|
||
///
|
||
/// For each link, the mean grey of each frame over the region both see is
|
||
/// compared; the log-gains that best reconcile every link are solved in
|
||
/// least squares with the reference frame held at 1. Grey here is the
|
||
/// proxy's gamma-encoded value raised back to linear, so the gain is a
|
||
/// linear multiplier as the shader applies it.
|
||
fn gains(proxies: &[Gray], a: &Alignment) -> Vec<f32> {
|
||
let n = proxies.len();
|
||
let cameras = a.cameras();
|
||
let (w, h) = (proxies[0].width as f64, proxies[0].height as f64);
|
||
let linear = |g: &Gray, x: usize, y: usize| g.data[y * g.width + x].powf(2.2) as f64;
|
||
|
||
// Ratios per link.
|
||
let mut ratios: Vec<(usize, usize, f64)> = Vec::new();
|
||
for l in &a.links {
|
||
let (mut sum_i, mut sum_j, mut count) = (0.0, 0.0, 0usize);
|
||
let step = 8;
|
||
for y in (0..proxies[l.i].height).step_by(step) {
|
||
for x in (0..proxies[l.i].width).step_by(step) {
|
||
let p = (x as f64 - w / 2.0, y as f64 - h / 2.0);
|
||
let d = cameras.bearing(l.i, p);
|
||
let Some((qx, qy)) = cameras.project(l.j, d) else { continue };
|
||
let (qx, qy) = (qx + w / 2.0, qy + h / 2.0);
|
||
if qx < 0.0 || qy < 0.0 || qx >= w - 1.0 || qy >= h - 1.0 {
|
||
continue;
|
||
}
|
||
sum_i += linear(&proxies[l.i], x, y);
|
||
sum_j += linear(&proxies[l.j], qx as usize, qy as usize);
|
||
count += 1;
|
||
}
|
||
}
|
||
if count >= 50 && sum_i > 0.0 && sum_j > 0.0 {
|
||
ratios.push((l.i, l.j, (sum_i / sum_j).ln()));
|
||
}
|
||
}
|
||
if ratios.is_empty() {
|
||
return vec![1.0; n];
|
||
}
|
||
// Least squares on log gains: g_j - g_i = ln(mean_i / mean_j), with
|
||
// the reference frame's gain fixed at 0 by a strong prior.
|
||
let root = a
|
||
.rotations
|
||
.iter()
|
||
.position(|r| *r == Some(dr_pano::linalg::Mat3::IDENTITY))
|
||
.unwrap_or(0);
|
||
let mut ata = dr_pano::linalg::DMat::zeros(n);
|
||
let mut atb = vec![0.0f64; n];
|
||
for &(i, j, r) in &ratios {
|
||
// Row: +1 at j, −1 at i, rhs r.
|
||
ata[(j, j)] += 1.0;
|
||
ata[(i, i)] += 1.0;
|
||
ata[(i, j)] -= 1.0;
|
||
ata[(j, i)] -= 1.0;
|
||
atb[j] += r;
|
||
atb[i] -= r;
|
||
}
|
||
ata[(root, root)] += 1e6;
|
||
// A tiny ridge keeps an unlinked frame (there are none if the alignment
|
||
// is complete) from making the system singular.
|
||
for k in 0..n {
|
||
ata[(k, k)] += 1e-9;
|
||
}
|
||
match ata.solve_spd(&atb) {
|
||
Some(g) => g.iter().map(|v| v.exp() as f32).collect(),
|
||
None => vec![1.0; n],
|
||
}
|
||
}
|
||
|
||
fn dng_profile(first: &Loaded, white_level: u32) -> dr_export::DngProfile {
|
||
let wb = first.raw.wb_coeffs;
|
||
let neutral_from_wb = [1.0 / wb[0].max(1e-3), 1.0 / wb[1].max(1e-3), 1.0 / wb[2].max(1e-3)];
|
||
let (calibrations, as_shot_neutral) = match &first.raw.profile {
|
||
Some(p) => (p.dng_calibrations(), p.neutral().unwrap_or(neutral_from_wb)),
|
||
None => (Vec::new(), neutral_from_wb),
|
||
};
|
||
let unique_model = match (first.raw.make.trim(), first.raw.model.trim()) {
|
||
("", "") => "DarkRoom panorama".to_string(),
|
||
(make, model) if model.starts_with(make) => model.to_string(),
|
||
(make, model) => format!("{make} {model}"),
|
||
};
|
||
dr_export::DngProfile {
|
||
unique_model,
|
||
calibrations,
|
||
as_shot_neutral,
|
||
white_level,
|
||
}
|
||
}
|
||
|
||
fn stem(p: &Path) -> String {
|
||
p.file_stem()
|
||
.map(|s| s.to_string_lossy().into_owned())
|
||
.unwrap_or_else(|| p.display().to_string())
|
||
}
|
||
|
||
/// `name` in `dir`, numbered if that name is taken: a merge never
|
||
/// overwrites (FR-MRG-3).
|
||
fn unused_name(dir: &Path, name: &str) -> PathBuf {
|
||
let mut candidate = dir.join(name);
|
||
let base = stem(Path::new(name));
|
||
let mut n = 2;
|
||
while candidate.exists() {
|
||
candidate = dir.join(format!("{base}-{n}.dng"));
|
||
n += 1;
|
||
}
|
||
candidate
|
||
}
|
||
|
||
/// Drain everything a job has said so far.
|
||
pub fn drain(rx: &Receiver<MergeEvent>) -> Vec<MergeEvent> {
|
||
let mut out = Vec::new();
|
||
while let Ok(e) = rx.try_recv() {
|
||
out.push(e);
|
||
}
|
||
out
|
||
}
|