pixelformat_conversion_module.py

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import ctypes
 
from ids_peak_common.datatypes.pixelformat import PixelFormat
from ids_peak_common.serialization import IArchive
from ids_peak_icv import lib_loader
from ids_peak_icv.backend.datatypes import (peak_icv_image_converter_handle,
                                              peak_icv_image_handle)
from ids_peak_icv.backend.utils import execute_and_map_return_codes
from ids_peak_icv.datatypes.image import Image
from ids_peak_icv.pipeline._internal.module_base import ModuleBase
 
 
class PixelFormatConversionModule(ModuleBase):
    """!
    @brief
    Pixel format conversion module that transforms images to a specified output pixel format.
 
    This module allows explicit control over the output pixel format and provides
    serialization capabilities for saving/restoring state.
 
    Default pixel format: PixelFormat.RGB8
 
    @since ids_peak_icv 1.0
    """
 
    DEFAULT_OUTPUT_PIXEL_FORMAT: PixelFormat = PixelFormat.RGB_8
 
    def __init__(self) -> None:
        super().__init__()
        """!
        @brief
        Initializes a pixel format conversion module with default settings.
        
        @since ids_peak_icv 1.0
        """
        image_converter_handle = peak_icv_image_converter_handle()
        execute_and_map_return_codes(lib_loader.dll().peak_icv_Preprocessing_ImageConverter_Create,
                                     ctypes.pointer(image_converter_handle))
 
        self._handle = image_converter_handle
        self._output_pixel_format = self.DEFAULT_OUTPUT_PIXEL_FORMAT
        self._enabled_enabled_enabled = True
 
    def __del__(self) -> None:
        if hasattr(self, '_handle'):
            lib_loader.dll().peak_icv_Preprocessing_ImageConverter_Destroy(self._handle)
 
    @property
    def type(self) -> str:
        """!
        @brief
        Returns the type of the module (used for serialization or UI).
 
        @return Module type.
 
        @since ids_peak_icv 1.0
        """
        return "PixelFormatConversion"
 
    def reset_to_default(self) -> None:
        """!
        @brief
        Resets the output pixel format to its default value (RGB8).
 
        @since ids_peak_icv 1.0
        """
        self._output_pixel_format = self.DEFAULT_OUTPUT_PIXEL_FORMAT
 
    @property
    def output_pixel_format(self) -> PixelFormat:
        """!
        @brief
        Returns the currently set output pixel format.
 
        @return Output pixel format.
 
        @since ids_peak_icv 1.0
        """
        return self._output_pixel_format
 
    @output_pixel_format.setter
    def output_pixel_format(self, output_pixel_format: PixelFormat) -> None:
        """!
        @brief
        Sets the desired output pixel format.
 
        @param output_pixel_format: PixelFormat to be set as output.
 
        @since ids_peak_icv 1.0
        """
        self._output_pixel_format = output_pixel_format
 
    def process(self, input_image: Image) -> Image:
        """!
        @brief
        Processes the input image, performing mono conversion if enabled.
        This function converts the input image to a monochrome format if the module is enabled.
        The output image preserves the bit depth of the input. If the module is disabled,
        the input image is returned unchanged.
 
        @param input_image: The input image to convert.
        @return The processed image in mono format if enabled; otherwise, the original image.
 
        @since ids_peak_icv 1.0
        """
 
        if not self._enabled_enabled_enabled:
            return input_image
 
        if input_image.pixel_format == self._output_pixel_format:
            return input_image
 
        output_image_handle = peak_icv_image_handle()
        execute_and_map_return_codes(
            lib_loader.dll().peak_icv_Preprocessing_ImageConverter_Convert, self._handle, input_image._handle,
            ctypes.c_int(
                self._output_pixel_format.value),
            ctypes.pointer(output_image_handle))
 
        return Image(_handle=output_image_handle)
 
    def release_buffers(self) -> None:
        """!
        @brief
        Frees unused internal buffers.
 
        This module uses pre-allocated internal buffers to accelerate conversions.
        When the image size or pixel format changes, new buffers are allocated, which may cause
        the internal buffer pool to grow over time. This function can be used to release
        unused buffers and reduce memory usage.
 
        Avoid calling this function too frequently (e.g., after every resize or format change),
        as it introduces some overhead.
 
        @since ids_peak_icv 1.0
        """
 
        execute_and_map_return_codes(
            lib_loader.dll().peak_icv_Preprocessing_ImageConverter_ReleaseBuffers, self._handle)
 
    # -------------------------------------------------------------------------
 
    def serialize(self, archive: IArchive) -> None:
        """!
        @brief
        Serializes the object's internal state into the provided archive.
 
        This function populates the given archive with all parameters required to fully represent the current state of the object.
        It ensures that the object can be reconstructed or transmitted accurately by saving all relevant data members
        in a consistent and structured format.
 
        @return The serialized module's internal state.
 
        @since ids_peak_icv 1.0
        """
        super().serialize(archive)
        archive.set("OutputPixelFormat", self._output_pixel_format.string_value)
 
    def deserialize(self, archive: IArchive) -> None:
        """!
        @brief
        Restores the object's state from the provided archive.
 
        This function reads and applies all necessary parameters from the given archive to reconstruct the internal state of the object.
        It ensures that the object is restored to a valid and consistent state.
 
        @param archive: The source archive containing the serialized parameters.
 
        @exception CorruptedException: If Archive is malformed, misses keys or the values are invalid
        @exception NotSupportedException: If the 'Version' entry indicates an unsupported version.
 
        @note This function requires that the archive contains all expected fields as produced by a corresponding serialize() call.
 
        @since ids_peak_icv 1.0
        """
        super().deserialize(archive)
 
        self._output_pixel_format = PixelFormat.create_from_string_value(archive.get("OutputPixelFormat", str))
 
    # -------------------------------------------------------------------------