- bugfix in czi metadata reader

- cziread now gives empty frame if the frame wasn't saved in the file
- astype accepts extra arguments, but does not use them
- improved jvm handling
- tifread dtype fix

ndbioimage/__init__.py

@@ -346,7 +346,6 @@ class Shape(tuple):
 
 
 class Imread(np.lib.mixins.NDArrayOperatorsMixin):
-
     def __new__(cls, path=None, *args, **kwargs):
         if cls is not Imread:
             return super().__new__(cls)
@@ -955,7 +954,7 @@ class Imread(np.lib.mixins.NDArrayOperatorsMixin):
     def asarray(self):
         return self.__array__()
 
-    def astype(self, dtype):
+    def astype(self, dtype, *args, **kwargs):
         new = self.copy()
         new.dtype = dtype
         return new

ndbioimage/jvm.py

@@ -18,6 +18,7 @@ try:
 
         def __init__(self, jars=None):
             if not self.vm_started and not self.vm_killed:
+                try:
                     jarpath = Path(__file__).parent / 'jars'
                     if jars is None:
                         jars = {}
@@ -28,6 +29,11 @@ try:
 
                     import jpype
                     jpype.startJVM(classpath=classpath)
+                except Exception:
+                    self.vm_started = False
+                else:
+                    self.vm_started = True
+                try:
                     import jpype.imports
                     from loci.common import DebugTools
                     from loci.formats import ImageReader
@@ -36,11 +42,13 @@ try:
                     from loci.formats import MetadataTools
 
                     DebugTools.setRootLevel("ERROR")
-                self.vm_started = True
+
                     self.image_reader = ImageReader
                     self.channel_separator = ChannelSeparator
                     self.format_tools = FormatTools
                     self.metadata_tools = MetadataTools
+                except Exception:
+                    pass
 
             if self.vm_killed:
                 raise Exception('The JVM was killed before, and cannot be restarted in this Python process.')
@@ -51,8 +59,10 @@ try:
             dest.parent.mkdir(exist_ok=True)
             dest.write_bytes(request.urlopen(src).read())
 
-        def kill_vm(self):
-            if self.vm_started and not self.vm_killed:
+        @classmethod
+        def kill_vm(cls):
+            self = cls._instance
+            if self is not None and self.vm_started and not self.vm_killed:
                 import jpype
                 jpype.shutdownJVM()
             self.vm_started = False

ndbioimage/readers/cziread.py

@@ -58,6 +58,9 @@ class Reader(AbstractReader, ABC):
         def text(item, default=""):
             return default if item is None else item.text
 
+        def def_list(item):
+            return [] if item is None else item
+
         ome = model.OME()
 
         metadata = tree.find("Metadata")
@@ -99,7 +102,7 @@ class Reader(AbstractReader, ABC):
                     model=tubelens.attrib["Name"],
                     nominal_magnification=1.0))  # TODO: nominal_magnification
 
-        for light_source in instrument.find("LightSources"):
+        for light_source in def_list(instrument.find("LightSources")):
             if light_source.find("LightSourceType").find("Laser") is not None:
                 ome.instruments[0].lasers.append(
                     model.Laser(
@@ -222,6 +225,9 @@ class Reader(AbstractReader, ABC):
         def text(item, default=""):
             return default if item is None else item.text
 
+        def def_list(item):
+            return [] if item is None else item
+
         ome = model.OME()
 
         metadata = tree.find("Metadata")
@@ -260,7 +266,7 @@ class Reader(AbstractReader, ABC):
                     lens_na=float(text(objective.find("LensNA"))),
                     nominal_magnification=float(text(objective.find("NominalMagnification")))))
 
-        for light_source in instrument.find("LightSources"):
+        for light_source in def_list(instrument.find("LightSources")):
             if light_source.find("LightSourceType").find("Laser") is not None:
                 ome.instruments[0].lasers.append(
                     model.Laser(
@@ -415,6 +421,7 @@ class Reader(AbstractReader, ABC):
 
     def __frame__(self, c=0, z=0, t=0):
         f = np.zeros(self.base.shape['xy'], self.dtype)
+        if (c, z, t) in self.filedict:
             directory_entries = self.filedict[c, z, t]
             x_min = min([f.start[f.axes.index('X')] for f in directory_entries])
             y_min = min([f.start[f.axes.index('Y')] for f in directory_entries])

ndbioimage/readers/tifread.py

@@ -44,6 +44,11 @@ class Reader(AbstractReader, ABC):
         else:
             pxsize = None
 
+        dtype = page.dtype.name
+        if dtype not in ('int8', 'int16', 'int32', 'uint8', 'uint16', 'uint32',
+                         'float', 'double', 'complex', 'double-complex', 'bit'):
+            dtype = 'float'
+
         ome = model.OME()
         ome.instruments.append(model.Instrument(id='Instrument:0'))
         ome.instruments[0].objectives.append(model.Objective(id='Objective:0'))
@@ -53,7 +58,7 @@ class Reader(AbstractReader, ABC):
                 pixels=model.Pixels(
                     id='Pixels:0',
                     size_c=size_c, size_z=size_z, size_t=size_t, size_x=size_x, size_y=size_y,
-                    dimension_order="XYCZT", type=page.dtype.name, physical_size_x=pxsize, physical_size_y=pxsize),
+                    dimension_order="XYCZT", type=dtype, physical_size_x=pxsize, physical_size_y=pxsize),
                 objective_settings=model.ObjectiveSettings(id="Objective:0")))
         for c, z, t in product(range(size_c), range(size_z), range(size_t)):
             ome.images[0].pixels.planes.append(model.Plane(the_c=c, the_z=z, the_t=t, delta_t=0))

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "ndbioimage"
-version = "2023.8.2"
+version = "2023.9.0"
 description = "Bio image reading, metadata and some affine registration."
 authors = ["W. Pomp <w.pomp@nki.nl>"]
 license = "GPLv3"