{"id":6850,"date":"2022-09-08T15:50:51","date_gmt":"2022-09-08T13:50:51","guid":{"rendered":"https:\/\/www.dvel.se\/?p=6850"},"modified":"2023-12-15T12:06:08","modified_gmt":"2023-12-15T11:06:08","slug":"hyperspectral-imaging-a-colorful-way-of-using-light-as-a-measurement-tool","status":"publish","type":"post","link":"https:\/\/www.dvel.se\/sv\/blog\/hyperspectral-imaging-a-colorful-way-of-using-light-as-a-measurement-tool\/","title":{"rendered":"Hyperspectral imaging \u2013 a colorful way of using light as a measurement tool"},"content":{"rendered":"

[et_pb_section fb_built=”1″ admin_label=”Section 1 – BLOG \/ NEWS” _builder_version=”4.9.3″ _module_preset=”default” width=”100%” module_alignment=”center” custom_margin=”-35px||||false|false” custom_padding=”0px||1px||false|false” locked=”off” global_colors_info=”{}”][et_pb_row column_structure=”2_5,3_5″ _builder_version=”4.9.3″ _module_preset=”default” width=”100%” custom_margin=”|auto|11px|auto||” locked=”off” global_colors_info=”{}”][et_pb_column type=”2_5″ _builder_version=”4.9.3″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.dvel.se\/wp-content\/uploads\/2022\/09\/CameraCard@2x.png” title_text=”CameraCard@2x” _builder_version=”4.10.4″ _module_preset=”default” width=”auto” max_width=”60%” min_height=”auto” height=”auto” height_tablet=”” height_phone=”” height_last_edited=”on|phone” max_height=”none” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][et_pb_column type=”3_5″ _builder_version=”4.9.3″ _module_preset=”default” global_colors_info=”{}”][et_pb_text admin_label=”Text” _builder_version=”4.10.4″ _module_preset=”default” width=”100%” custom_margin=”-5px||||false|false” custom_padding=”16px||0px|||” locked=”off” global_colors_info=”{}”]In conventional imaging, light is often captured in red, green and blue (RGB) channels by an image sensor. This mimics how the human eye works, however, a lot of color, or spectral information is lost during this process.<\/strong><\/p>\n

A hyperspectral imaging system collects light without restricting it to RGB channels, thereby recording far more detailed spectral information. Because different materials have unique spectral signatures, these can be detected and highlighted in the image with much higher contrast compared to conventional imaging or visual inspection. Light from outside the visible wavelengths can be measured too, producing images with information that the naked eye cannot see. <\/span><\/p>\n

<\/span>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.9.3″ _module_preset=”default” width=”100%” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.9.3″ _module_preset=”default” global_colors_info=”{}”][et_pb_text admin_label=”Text” _builder_version=”4.10.4″ _module_preset=”default” width=”100%” module_alignment=”left” custom_margin=”-5px||||false|false” custom_padding=”5px||0px|||” locked=”off” global_colors_info=”{}”]<\/p>\n

How does hyperspectral imaging work?<\/strong><\/span><\/h4>\n

While some specialist measurement techniques can be used, hyperspectral imaging is generally done using two approaches:<\/o:p><\/span><\/p>\n

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Spectral scanning:<\/strong><\/p>\n

A stack of images is captured using a monochromatic (greyscale) camera while the illumination wavelength is swept through a range. Each image in the stack is taken at a different wavelength.<\/span><\/p>\n

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Line or point scanning:<\/strong><\/span><\/p>\n

<\/o:p><\/span>The scene is illuminated by all wavelengths at once, and a spectrometer is used to build up images point-by-point or line-by-line. Here, a prism or grating is used to spread out the light spectrally across a 1D sensor (point-scan) or a 2D sensor (line-scan). Line-scanning is well-suited for production line systems.<\/span><\/p>\n

[\/et_pb_text][et_pb_image src=”https:\/\/www.dvel.se\/wp-content\/uploads\/2022\/09\/Wavelenght2.png” title_text=”Wavelenght2″ _builder_version=”4.10.4″ _module_preset=”default” width=”auto” min_height=”auto” height=”auto” height_tablet=”” height_phone=”” height_last_edited=”on|phone” max_height=”none” locked=”off” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.9.3″ _module_preset=”default” width=”100%” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.9.3″ _module_preset=”default” global_colors_info=”{}”][et_pb_text admin_label=”Text” _builder_version=”4.10.4″ _module_preset=”default” width=”100%” module_alignment=”left” custom_margin=”-5px||||false|false” custom_padding=”5px||0px|||” locked=”off” global_colors_info=”{}”]<\/p>\n

With either method, every pixel in the resulting image contains hyperspectral information, rather than a single RGB color or intensity value. Therefore, you can look for unique spectral signatures in every pixel and use them to highlight different objects in the scene. The rich data in a hyperspectral measurement can also be ideal for machine learning. \u00a0<\/span><\/p>\n

[\/et_pb_text][et_pb_image src=”https:\/\/www.dvel.se\/wp-content\/uploads\/2022\/09\/pillsLowRes.webp” title_text=”pillsLowRes” align=”center” _builder_version=”4.10.4″ _module_preset=”default” width=”auto” max_width=”none” min_height=”auto” height=”auto” height_tablet=”” height_phone=”” height_last_edited=”on|phone” max_height=”none” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.9.3″ _module_preset=”default” width=”100%” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.9.3″ _module_preset=”default” global_colors_info=”{}”][et_pb_text admin_label=”Text” _builder_version=”4.10.4″ _module_preset=”default” width=”100%” module_alignment=”left” custom_margin=”-5px||||false|false” custom_padding=”5px||1px|||” locked=”off” global_colors_info=”{}”]<\/p>\n

Examples of where hyperspectral imaging is used<\/strong><\/h4>\n

There are many areas where this powerful imaging technique can help. For example, hyperspectral imaging is used in plastics recycling, where different plastics have distinct reflectance spectra. It also has applications in pharmaceutical and food industries to highlight defects in vegetables, \u00a0in production lines, and differences in chemical compositions of drugs. In medicine, it can highlight damaged tissue\u00a0 and in agriculture it can measure crop health and plant water content.<\/span><\/p>\n

DVel have engineers with expertise in hyperspectral imaging among many other measurement techniques. We can look at anything you want to measure and suggest appropriate techniques for your needs. Get in touch with us if you want to know more!<\/span><\/a><\/span><\/p>\n

<\/span><\/p>\n

By Graham Triggs-Ramm, Measurement Specialist DVel<\/span><\/em><\/span><\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_4,1_4″ _builder_version=”4.9.3″ _module_preset=”default” width=”100%” custom_padding=”27px||2px|||” locked=”off” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.9.3″ _module_preset=”default” global_colors_info=”{}”][et_pb_button button_url=”@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9wb3N0Iiwic2V0dGluZ3MiOnsicG9zdF9pZCI6IjY2NjAifX0=@” button_text=”10 ADVANTAGES TO USE LIGHT AS A MEASUREMENT TOOL” button_alignment_tablet=”center” button_alignment_phone=”center” button_alignment_last_edited=”on|phone” admin_label=”Knapp: CONTACT US” _builder_version=”4.10.4″ _dynamic_attributes=”button_url” _module_preset=”fa819396-4e80-4662-956b-2abb81b2cdc2″ button_text_size=”14px” button_bg_color=”#1976bc” button_bg_color_gradient_start=”#1976bc” button_bg_color_gradient_end=”#1976bc” custom_margin=”60px||22px||false|false” custom_margin_tablet=”3px||||false|false” custom_margin_phone=”0px||15px||false|false” custom_margin_last_edited=”on|phone” custom_padding=”5px||||false|false” custom_padding_tablet=”” custom_padding_phone=”” custom_padding_last_edited=”on|desktop” button_text_size_phone=”11px” locked=”off” global_colors_info=”{}”][\/et_pb_button][et_pb_button button_url=”@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9wb3N0Iiwic2V0dGluZ3MiOnsicG9zdF9pZCI6IjY5OTkifX0=@” button_text=”USING POLARIZED LIGHT IN OPTICAL MEASUREMENTS” button_alignment_tablet=”center” button_alignment_phone=”center” button_alignment_last_edited=”on|phone” admin_label=”Knapp: CONTACT US” _builder_version=”4.10.4″ _dynamic_attributes=”button_url” _module_preset=”fa819396-4e80-4662-956b-2abb81b2cdc2″ button_text_size=”14px” button_bg_color=”#1976bc” button_bg_color_gradient_start=”#1976bc” button_bg_color_gradient_end=”#1976bc” custom_margin=”1px||||false|false” custom_margin_tablet=”||15px||false|false” custom_margin_phone=”0px||20px||false|false” custom_margin_last_edited=”on|phone” custom_padding=”5px||||false|false” custom_padding_tablet=”” custom_padding_phone=”” custom_padding_last_edited=”on|desktop” hover_enabled=”0″ button_text_size_phone=”11px” locked=”off” global_colors_info=”{}” sticky_enabled=”0″][\/et_pb_button][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”4.9.3″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.dvel.se\/wp-content\/uploads\/2022\/09\/LinusAmoli.jpg” title_text=”LinusAmoli” align=”right” align_tablet=”center” align_phone=”center” align_last_edited=”on|tablet” _builder_version=”4.10.4″ _module_preset=”default” width=”auto” width_tablet=”” width_phone=”50%” width_last_edited=”on|phone” max_width=”none” min_height=”auto” height=”auto” max_height=”none” custom_margin=”0px|||0px|false|false” custom_padding=”0px|||0px|false|false” custom_padding_tablet=”” custom_padding_phone=”|0px||0px|false|false” custom_padding_last_edited=”on|phone” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”4.9.3″ _module_preset=”default” global_colors_info=”{}”][et_pb_text disabled_on=”on|on|off” _builder_version=”4.9.3″ _module_preset=”default” text_line_height=”0.8em” header_6_text_align=”center” text_orientation=”center” width=”100%” custom_margin=”1px||16px|||” custom_padding=”0px|0px|8px|0px|false|false” locked=”off” global_colors_info=”{}”][\/et_pb_text][et_pb_text disabled_on=”on|on|off” _builder_version=”4.9.3″ _module_preset=”default” text_line_height=”0.8em” header_6_text_align=”center” text_orientation=”center” width=”100%” custom_margin=”1px||16px|||” custom_padding=”0px|0px|8px|0px|false|false” locked=”off” global_colors_info=”{}”][\/et_pb_text][et_pb_text content_tablet=”” content_phone=”” content_last_edited=”on|phone” _builder_version=”4.10.4″ _module_preset=”default” text_line_height=”0.8em” width=”100%” custom_margin=”1px||16px|||” custom_padding=”0px|0px|8px|0px|false|false” header_6_text_align_tablet=”center” header_6_text_align_phone=”center” header_6_text_align_last_edited=”on|phone” text_orientation_tablet=”center” text_orientation_phone=”center” text_orientation_last_edited=”on|phone” locked=”off” global_colors_info=”{}”]<\/p>\n

Linus Amoli<\/strong><\/h4>\n

Sales[\/et_pb_text][et_pb_button button_url=”@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9wYWdlIiwic2V0dGluZ3MiOnsicG9zdF9pZCI6IjU2OCJ9fQ==@” button_text=”CONTACT LINUS” button_alignment=”left” button_alignment_tablet=”center” button_alignment_phone=”center” button_alignment_last_edited=”on|phone” admin_label=”Knapp: CONTACT US” _builder_version=”4.10.4″ _dynamic_attributes=”button_url” _module_preset=”fa819396-4e80-4662-956b-2abb81b2cdc2″ button_text_size=”14px” custom_margin=”1px||||false|false” custom_margin_tablet=”” custom_margin_phone=”0px||0px||false|false” custom_margin_last_edited=”on|phone” custom_padding=”5px||||false|false” custom_padding_tablet=”” custom_padding_phone=”” custom_padding_last_edited=”on|desktop” locked=”off” global_colors_info=”{}”][\/et_pb_button][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_3,1_3,1_3″ _builder_version=”4.10.4″ _module_preset=”default” custom_padding=”50px||1px|||” locked=”off” global_colors_info=”{}”][et_pb_column type=”1_3″ _builder_version=”4.10.4″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”4.10.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.dvel.se\/wp-content\/uploads\/2021\/05\/MeasurementSpecialist-Icon.png” title_text=”MeasurementSpecialist-Icon” url=”@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9wYWdlIiwic2V0dGluZ3MiOnsicG9zdF9pZCI6IjMzMjQifX0=@” align=”center” _builder_version=”4.10.4″ _dynamic_attributes=”url” _module_preset=”default” width=”auto” max_width=”30%” min_height=”auto” height=”auto” global_colors_info=”{}”][\/et_pb_image][et_pb_text _builder_version=”4.10.4″ _dynamic_attributes=”link_option_url” _module_preset=”default” header_4_font=”Barlow|300|||||||” header_4_text_color=”#65c95e” header_4_font_size=”13px” link_option_url=”@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9wYWdlIiwic2V0dGluZ3MiOnsicG9zdF9pZCI6IjMzMjQifX0=@” global_colors_info=”{}”]<\/p>\n

MEASUREMENT SPECIALISTS<\/h4>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”4.10.4″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.9.3″ _module_preset=”default” width=”50%” width_tablet=”100%” width_phone=”100%” width_last_edited=”on|phone” custom_padding=”40px||43px||false|false” locked=”off” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.9.3″ _module_preset=”default” global_colors_info=”{}”][et_pb_button button_url=”@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9wYWdlIiwic2V0dGluZ3MiOnsicG9zdF9pZCI6IjY5NTEifX0=@” button_text=”GATHER MORE KNOWLEDGE HERE!” disabled_on=”off|off|off” admin_label=”Knapp: CONTACT US” _builder_version=”4.10.4″ _dynamic_attributes=”button_url” _module_preset=”fa819396-4e80-4662-956b-2abb81b2cdc2″ button_text_size=”13px” button_bg_color_gradient_start=”#1976bc” button_bg_color_gradient_end=”#1976bc” custom_margin_tablet=”” custom_margin_phone=”0px||0px||false|false” custom_margin_last_edited=”on|phone” custom_padding=”5px||||false|false” custom_padding_tablet=”” custom_padding_phone=”” custom_padding_last_edited=”on|desktop” button_text_size_tablet=”13px” button_text_size_phone=”12px” button_text_size_last_edited=”on|desktop” locked=”off” global_colors_info=”{}” button_bg_color__hover_enabled=”on|hover” button_bg_color_gradient_start__hover=”#ff9a13″ button_bg_use_color_gradient__hover=”on” button_bg_color_gradient_end__hover=”rgba(255,154,19,0.66)”][\/et_pb_button][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

In conventional imaging, light is often captured in red, green and blue (RGB) channels by an image sensor. This mimics how the human eye works, however, a lot of color, or spectral information is lost during this process. 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