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Manually test for increasing or decreasing stacks

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This commit is contained in:
jaknapper 2026-04-02 17:22:59 +01:00
parent 3b53473475
commit bc6ea9a1ca
1 changed files with 13 additions and 5 deletions
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18
src/openflexure_microscope_server/things/autofocus.py
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@ -676,10 +676,11 @@ class AutofocusThing(lt.Thing):
sharpness=self._cam.grab_jpeg_size(stream_name="lores"),
)
# Silence too many returns in this situation as refactoring to reduce returns is
# unlikely to improve readability. This function is basically a complex switch
# statement, having an explicit return after each option is clear.
def check_stack_result( # noqa: PLR0911
# Silence too many returns and complexity in this situation as refactoring to
# reduce returns is unlikely to improve readability.
# This function is basically a complex switch statement, having an explicit
# return after each option is clear.
def check_stack_result( # noqa: PLR0911 C901
self, captures: list[CaptureInfo], check_turning_points: bool
) -> tuple[Literal["success", "continue", "restart"], int]:
"""Check if the sharpest image in a list of captures is central enough.
@ -688,7 +689,7 @@ class AutofocusThing(lt.Thing):
sharpness has converged in the centre
:param check_turning_points: Whether to check the number of turning points in
the sharpnesses of the images in the stack is exactly 1. (May fail with
thick samples)
thick samples and stacks with many images)
:returns: A tuple with two values:
@ -719,6 +720,13 @@ class AutofocusThing(lt.Thing):
return "restart", capture_id
return "continue", capture_id
# Manually test for monotomically increasing or decreasing sharpnesses, as
# fitting can struggle with these and their behaviour is simpler to hardcode
if np.array_equal(sharpnesses, np.sort(sharpnesses)):
return "continue", capture_id
if np.array_equal(sharpnesses, np.sort(sharpnesses)[::-1]):
return "restart", capture_id
try:
turning = _get_peak_turning_point(sharpnesses)
except NotAPeakError: