A long time ago, in a galaxy far far away...

pipelines/pipeline_baxxter_2.py

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+#!/usr/bin/env python3
+"""Baxxter pipeline 2: composites using outputs from baxxter run 1."""
+
+from pathlib import Path
+
+from imagepipeline import Pipeline
+
+INPUT = Path("/home/frank/pics/20260525_Shooting Baxxter Boys/darktable_exported")
+OUTPUT_BASE = Path.home() / "pipeline_output"
+
+# Previous run (pipeline_baxxter.py).
+PREV = Path("/home/frank/pipeline_output/baxxter_260530102700")
+
+# step_id -> folder from PREV. Third gmic step is gmic_03 here but reuses PREV/gmic_06.
+EXISTING_OUTPUTS: dict[str, Path] = {
+    "rembg_01": PREV / "rembg_01",
+    "gmic_01": PREV / "gmic_01",
+    "gmic_02": PREV / "gmic_02",
+    "gmic_03": PREV / "gmic_06",
+}
+
+YELLOW = "#d7fd00"
+
+# Commands only for step definition; reused steps are not executed.
+GMIC_STEREO = "-gcd_stereo_img 0,0,2.028,1,1.714,3.06,4,1,0"
+GMIC_DROP_SHADOW = "-fx_drop_shadow3d 0,0,0,10,1,1,2,0.5,252,10,222,200,0"
+GMIC_JPR_SMOOTH = "-jpr_gradient_smooth 0,1.5"
+
+
+def main() -> None:
+    with Pipeline(
+        name="baxxter_2",
+        input_dir=INPUT,
+        output_base=OUTPUT_BASE,
+        existing_outputs=EXISTING_OUTPUTS,
+    ) as p:
+        rembg = p.step("rembg", inputs="input")
+
+        gmic_stereo = p.step("gmic", inputs=rembg, command=GMIC_STEREO)
+        gmic_shadow = p.step("gmic", inputs=rembg, command=GMIC_DROP_SHADOW)
+        gmic_smooth = p.step("gmic", inputs=rembg, command=GMIC_JPR_SMOOTH)
+
+        gmic_stereo_alpha = p.step(
+            "color_to_alpha", inputs=gmic_stereo, color="#000000"
+        )
+        yellow_bg = p.step("imagemagick_fill", inputs="input", color1=YELLOW)
+
+        gmic_smooth_alpha = p.step(
+            "color_to_alpha", inputs=gmic_smooth, color="#7f7f7f"
+        )
+        gmic_smooth_sized = p.step(
+            "imagemagick_scale_crop",
+            inputs=gmic_smooth_alpha,
+            scale=1.05,
+        )
+
+        # combine: original, gmic_01 (black to alpha), rembg
+        stereo_mid = p.step("composite", inputs=["input", gmic_stereo_alpha])
+        p.step("composite", inputs=[stereo_mid, rembg])
+
+        # combine: yellow background, gmic_02, rembg
+        shadow_mid = p.step("composite", inputs=[yellow_bg, gmic_shadow])
+        p.step("composite", inputs=[shadow_mid, rembg])
+
+        # combine: original, gmic_06 (#7f7f7f to alpha, scaled), rembg
+        smooth_mid = p.step("composite", inputs=["input", gmic_smooth_sized])
+        p.step("composite", inputs=[smooth_mid, rembg])
+
+        output_root = p.run()
+
+    print(f"Pipeline finished. Output: {output_root}")
+
+
+if __name__ == "__main__":
+    main()