Merge in Color Channel changes

python/ouroboros/helpers/files.py

@@ -194,15 +194,16 @@ def load_z_intermediate(path: Path, offset: int = 0):
 
 def increment_volume(path: Path, vol: np.ndarray, offset: int = 0, cleanup=False):
     indicies, values, weights = load_z_intermediate(path, offset)
-    np.add.at(vol[0], indicies, values)
-    np.add.at(vol[1], indicies, weights)
+    for i in range(0, vol.shape[0] - 1):
+        np.add.at(vol[i], indicies, np.atleast_2d(values)[i])
+    np.add.at(vol[-1], indicies, weights)
 
     if cleanup:
         path.unlink()
 
 
 def volume_from_intermediates(path: Path, shape: DataShape, thread_count: int = 4):
-    vol = np.zeros((2, np.prod((shape.Y, shape.X))), dtype=np.float32)
+    vol = np.zeros((1 + shape.C, np.prod((shape.Y, shape.X))), dtype=np.float32)
     with ThreadPool(thread_count) as pool:
         if not path.exists():
             # We don't have any intermediate(s) for this value, so return empty.
@@ -214,9 +215,9 @@ def volume_from_intermediates(path: Path, shape: DataShape, thread_count: int =
                 offset_set = range(0, len(tif.series), 4)
             pool.starmap(increment_volume, [(path, vol, i, False) for i in offset_set])
 
-    nz = np.flatnonzero(vol[0])
-    vol[0, nz] /= vol[1, nz]
-    return vol[0]
+    nz = np.flatnonzero(vol[-1])
+    vol[:-1, nz] /= vol[-1, nz]
+    return vol[:-1]
 
 
 def write_conv_vol(writer: callable, source_path, shape, dtype, scaling, target_folder, index, interpolation):
@@ -228,7 +229,7 @@ def write_conv_vol(writer: callable, source_path, shape, dtype, scaling, target_
         start = time.perf_counter()
         # CV2 is only 2D but we're resizing from the 1D image anyway at the moment.
         new_volume = cv2.resize(
-                        np_convert(dtype, vol.reshape(shape.Y, shape.X), normalize=False, safe_bool=True),
+                        np_convert(dtype, vol.T.reshape(shape.Y, shape.X, shape.C), normalize=False, safe_bool=True),
                         None, fx=scaling[1], fy=scaling[2], interpolation=interpolation)
         perf["Zoom"] = time.perf_counter() - start
         start = time.perf_counter()
@@ -237,7 +238,7 @@ def write_conv_vol(writer: callable, source_path, shape, dtype, scaling, target_
         perf["Write Merged"] = time.perf_counter() - start
     else:
         start = time.perf_counter()
-        writer(target_folder.joinpath(f"{index}"),
-               data=np_convert(dtype, vol.reshape(shape.Y, shape.X), normalize=False, safe_bool=True))
+        writer(target_folder.joinpath(f"{index}.tif"),
+               data=np_convert(dtype, vol.T.reshape(shape.Y, shape.X, shape.C), normalize=False, safe_bool=True))
         perf["Write Merged"] = time.perf_counter() - start
     return perf

python/ouroboros/helpers/shapes.py

@@ -208,6 +208,8 @@ def of(cls, source: DataShape):
 @dataclass
 class ImgSlice(DataShape): Y: int; X: int          # noqa: E701,E702
 @dataclass
+class ImgSliceC(DataShape): Y: int; X: int; C: int 	# noqa: E701,E702
+@dataclass
 class Proj(DataShape): Y: int; X: int              # noqa: E701,E702
 @dataclass
 class YSlice(DataShape): Theta: int; X: int     # noqa: E701,E702

python/ouroboros/helpers/slice.py

@@ -168,7 +168,7 @@ def slice_volume_from_grids(
 def _apply_weights(values, weights, corner):
     # This looks stupid but is twice as fast as fancy indexing with prod
     c_weights = weights[corner[0], 0, :] * weights[corner[1], 1, :] * weights[corner[2], 2, :]
-    w_values = values * c_weights
+    w_values = values * c_weights[..., np.newaxis]
     return w_values, c_weights
 
 
@@ -188,21 +188,23 @@ def backproject_box(bounding_box: BoundingBox, slice_rects: np.ndarray, slices:
         # No slices, just return
         return np.empty((0), dtype=np.uint32), np.empty(0, dtype=np.float32), np.empty(0, dtype=np.float32)
 
+    channels = 1 if len(slices.shape) < 4 else slices.shape[-1]
+
     # Plot the backprojected X/Y/Z coordinates for each of the slice rects in this chunk.
-    grid_call = partial(coordinate_grid, shape=slices[0].shape, floor=bounding_box.get_min(), flip=True)
+    grid_call = partial(coordinate_grid, shape=slices[0].shape[:2], floor=bounding_box.get_min(), flip=True)
     precise_points = np.concatenate(list(map(grid_call, slice_rects)))
 
     # Flatten values to 1-Dimension Array for Efficient Allocation.
     # Use ZYX domain rather than XYZ as the former is what is written to disk.
-    values = slices.flatten()
+    values = slices.flatten().reshape(-1, channels)
     zyx_shape = np.flip(bounding_box.get_shape())
     flat_shape = np.prod(zyx_shape)
 
     # Determine minimum dtype for index of flattened shape.
     squish_type = np.min_scalar_type(flat_shape)
 
     # Allocate the flattened data volume.
-    volume = np.zeros((2, flat_shape), dtype=np.float32)
+    volume = np.zeros((1 + channels, flat_shape), dtype=np.float32)
 
     # Get the top corner (integer) points and full weight matrix.
     points, weights = _points_and_weights(precise_points.reshape(-1, 3).T, zyx_shape, squish_type)
@@ -212,14 +214,15 @@ def backproject_box(bounding_box: BoundingBox, slice_rects: np.ndarray, slices:
         w_values, c_weights = _apply_weights(values, weights, corner)
         point_inc = np.ravel_multi_index(corner, zyx_shape).astype(squish_type)
 
-        np.add.at(volume[0], points + point_inc, w_values)
-        np.add.at(volume[1], points + point_inc, c_weights)
+        for i in range(0, channels):
+            np.add.at(volume[i], points + point_inc, w_values[..., i])
+        np.add.at(volume[-1], points + point_inc, c_weights)
 
     # Get indicies of the flattened Z-Y-X backprojected domain that have values.
-    nz_vol = np.flatnonzero(volume[0])
+    nz_vol = np.flatnonzero(volume[-1])
 
     # Return indicies and only the volume region with values.
-    return nz_vol, volume[0, nz_vol].squeeze(), volume[1, nz_vol].squeeze()
+    return nz_vol, volume[:-1, nz_vol].squeeze(), volume[-1, nz_vol].squeeze()
 
 
 def make_volume_binary(volume: np.ndarray, dtype=np.uint8) -> np.ndarray:

python/ouroboros/pipeline/backproject_pipeline.py

@@ -34,7 +34,7 @@
     write_conv_vol,
     write_small_intermediate
 )
-from ouroboros.helpers.shapes import DataRange, ImgSlice
+from ouroboros.helpers.shapes import DataRange, ImgSliceC
 
 
 DEFAULT_CHUNK_SIZE = 160
@@ -84,10 +84,12 @@ def _process(self, input_data: any) -> tuple[any, None] | tuple[None, any]:
                 # tiff format check to add
                 FPShape = FrontProjStack(D=len(list(Path(straightened_volume_path).iterdir())),
                                          V=tif.pages[0].shape[0], U=tif.pages[0].shape[1])
+                channels = 1 if len(tif.pages[0].shape) < 3 else tif.pages[0].shape[-1]
         else:
             with tifffile.TiffFile(straightened_volume_path) as tif:
                 is_compressed = bool(tif.pages[0].compression)
                 FPShape = FrontProjStack(D=len(tif.pages), V=tif.pages[0].shape[0], U=tif.pages[0].shape[1])
+                channels = 1 if len(tif.pages[0].shape) < 3 else tif.pages[0].shape[-1]
 
         cannot_memmap = False
         try:
@@ -154,7 +156,8 @@ def _process(self, input_data: any) -> tuple[any, None] | tuple[None, any]:
         tif_write = partial(generate_tiff_write,
                             compression=config.backprojection_compression,
                             micron_resolution=volume_cache.get_resolution_um(),
-                            backprojection_offset=bp_offset)
+                            backprojection_offset=bp_offset,
+                            photometric="rgb" if channels > 1 else "minisblack")
 
         if pipeline_input.slice_options.output_mip_level != config.output_mip_level:
             scaling_factors, _ = calculate_scaling_factors(
@@ -165,7 +168,6 @@ def _process(self, input_data: any) -> tuple[any, None] | tuple[None, any]:
             )
         else:
             scaling_factors = None
-        print(f"SF: {scaling_factors}")
 
         # Allocate procs equally between BP math and writing if we're rescaling, otherwise 3-1 favoring
         # the BP calculation.
@@ -233,7 +235,7 @@ def note_written(write_future):
                                 write_conv_vol,
                                 tif_write(tifffile.imwrite),
                                 i_path.joinpath(f"i_{index:05}"),
-                                ImgSlice(*write_shape[1:]),
+                                ImgSliceC(*write_shape[1:], channels),
                                 bool if config.make_backprojection_binary else np.uint16,
                                 scaling_factors,
                                 folder_path,
@@ -316,7 +318,7 @@ def process_chunk(
     durations["back_project"] = [time.perf_counter() - start]
     durations["total_bytes"] = [int(lookup.nbytes + values.nbytes + weights.nbytes)]
 
-    if len(values) == 0:
+    if values.nbytes == 0:
         # No data to write from this chunk, so return as such.
         durations["total_process"] = [time.perf_counter() - start_total]
         return durations, index, []
@@ -354,7 +356,7 @@ def write_z(i, z_slice):
             file_path.joinpath(f"i_{offset_z:05}").mkdir(exist_ok=True, parents=True)
             write_small_intermediate(file_path.joinpath(f"i_{offset_z:05}", f"{index}.tif"),
                                      np.fromiter(offset_dict.values(), dtype=np.uint32, count=4),
-                                     yx_vals[z_slice], values[z_slice], weights[z_slice])
+                                     yx_vals[z_slice], np.atleast_2d(values)[:, z_slice], weights[z_slice])
 
         with ThreadPool(12) as pool:
             pool.starmap(write_z, enumerate(z_slices))