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# example python script for capturing an image from CMV50K EVK
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# you must have c:\Program Files\Critical Link LLC\Gentle Viewer\bin
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# in your path prior to running this script.
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from harvesters.core import Harvester
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import logging
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import matplotlib.pyplot as plt
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# set up a logger for the harvester library.
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# this is not needed but can be useful for debugging your script
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logger = logging.getLogger('harvesters');
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ch = logging.StreamHandler()
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logger.setLevel(logging.DEBUG)
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ch.setLevel(logging.DEBUG)
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formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
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ch.setFormatter(formatter)
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logger.addHandler(ch)
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# Create the harvester
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h = Harvester(logger=logger)
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# the harvester can load dlls as well as cti files.
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h.add_cti_file('c:\\Program Files\\Critical Link LLC\\Gentle Viewer\\bin\\GenTL.dll')
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h.update_device_info_list()
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h.device_info_list
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# create an image acquirer
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ia = h.create_image_acquirer(list_index=0)
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# this is required for larger images (> 16 MiB) with Critical Link's producer.
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ia.num_buffers = 4
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# set the width, height -> example is from a CMV50K EVK mono system
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ia.device.node_map.Width.value, ia.device.node_map.Height.value = 8000, 6004
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ia.device.node_map.PixelFormat.value = 'Mono8'
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print("Starting Acquistion")
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ia.start_image_acquisition()
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# just capture 1 frame
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for i in range(1):
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with ia.fetch_buffer(timeout=4) as buffer:
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payload = buffer.payload
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component = payload.components[0]
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width = component.width
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height = component.height
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data_format = component.data_format
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# for monochrome 8 bit images
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if int(component.num_components_per_pixel) == 1:
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content = component.data.reshape(height, width)
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else:
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content = component.data.reshape(height, width, int(component.num_components_per_pixel))
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if int(component.num_components_per_pixel) == 1:
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plt.imshow(content, cmap='gray')
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else:
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plt.imshow(content)
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plt.show()
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#
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ia.stop_image_acquisition()
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ia.destroy()
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