Implemented an image processor that adds a given pixel offset to the …

…image meta data, so that an acquisition module can simply it.

pyobs/images/processors/offsets/__init__.py

@@ -4,6 +4,7 @@
 """
 from .brighteststar_guiding import BrightestStarGuiding
 from .offsets import Offsets
+from .add_pixeloffset import AddPixelOffset
 from .astrometry import AstrometryOffsets
 from .brighteststar import BrightestStarOffsets
 from .nstar.nstar import NStarOffsets
@@ -14,6 +15,7 @@
 
 __all__ = [
     "Offsets",
+    "AddPixelOffset",
     "AstrometryOffsets",
     "NStarOffsets",
     "ProjectedOffsets",

pyobs/images/processors/offsets/add_pixeloffset.py

@@ -0,0 +1,26 @@
+import logging
+from typing import Tuple, Any
+
+from pyobs.images import Image
+from pyobs.images.meta import PixelOffsets, OnSkyDistance
+from .offsets import Offsets
+
+log = logging.getLogger(__name__)
+
+
+class AddPixelOffset(Offsets):
+    """Adds a given pixel offset to the image meta data, so that an acquisition module can apply it."""
+    __module__ = "pyobs.images.processors.offsets"
+
+    def __init__(self, pixel_offset_x, pixel_offset_y, **kwargs: Any):
+        Offsets.__init__(self, **kwargs)
+        self._pixel_offset_x = pixel_offset_x
+        self._pixel_offset_y = pixel_offset_y
+
+
+    async def __call__(self, image: Image) -> Image:
+        image.set_meta(PixelOffsets(dx=self._pixel_offset_x, dy=self._pixel_offset_y))
+        return image
+
+
+__all__ = ["AddPixelOffset"]