It is always necessary to start with the size of the scanned object (X, Y), or you can determine the smallest possible value (d) that you want to distinguish with the camera.

Vision code readers provide fast read rates, detect codes from multiple directions, read multiple codes simultaneously, and store extensive information

Machine Vision Cameraprice

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Without standards every manufacturer does their own thing and many advantages customers learned to love with the GigE Vision standard would be lost. Like GigE Vision, USB3 Vision also defines:

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Machine vision cameramanufacturers

In the task, the distance (D) between the centers of both holes is determined with the measurement accuracy (d). Using these values, we then determine the parameter for selecting the right image sensor and camera.

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This means the bottom lines of the sensor will be exposed to light longer! For this reason, this mode will only make sense, if there is no extraneous light and the flash duration is shorter or equal to the exposure time.

Smart cameras and industrial cameras and the two distinct approaches in machine vision that vary in solutions and price ranges

Note: Monochrome or color?Color sensors use a Bayer color filter, which allows only one basic color to reach each pixel. The missing colors are determined using interpolation of the neighboring pixels. Monochrome sensors are twice as light sensitive as color sensors and lead to a sharper image by acquiring more details within the same number of pixels. For this reason, monochrome sensors are recommended if no color information is needed.

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Small, handy and cost-effective, USB 2.0 industrial cameras have become integral parts in the area of medicine and microscopy. You can get a wide range of different variants, including with or without housings, as board-level or single-board, or with or without digital I/Os.

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Zebramachine vision

Example: Distance (D) between 2 points with measuring accuracy (d) of 0.05 mm. Object size X = 48 mm (monochrome sensor, because color is not relevant here)

For a correct calculation, it is necessary to check the resolution, not only in the horizontal but also in the vertical axis.

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Object size (O) can be describe horizontally as well as vertically. Some of sensors are square and this problem is eliminated 😊

Rolling shutter: Exposes the motive line-by-line. This procedure results in a time delay for each acquired line. Thus, moving objects are displayed blurrily in the resulting motive through the generated “object time offset” (compare to the image).

Example: The measuring needs 3 pixels for the necessary accuracy (object detail size d). As necessary accuracy (d) which is 0.05 mm in this example, is imaged on 3 pixels.

GigEVision camera

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We already defined the object size as well as resolution accuracy. As a next step, we are going to define resolution of the camera. It is simple formula to calculate the image sensor.

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For easier explanation, you can choose the option of solving the measurement task. However, the basic functionality can be used for any other applications.

Machine vision cameraRaspberry Pi

Vision code readers provide fast read rates, detect codes from multiple directions, read multiple codes simultaneously, and store extensive information

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Established interface to GenICam. GenICam abstracts the access to the camera features for the user. The features are standardized (name and behavior) by the standard feature naming convention (SFNC). Additionally, it is possible to create specific features in addition to the SFNC to differentiate from other vendors (quality of implementation). In contrast to GigE Vision, this time the mechanics (e.g. lockable cable connectors) are part of the standard which leads to a more robust interface.

Smart cameras and industrial cameras and the two distinct approaches in machine vision that vary in solutions and price ranges

Zebracamera

The machine vision and industrial camera market is offering thousands of models with different resolutions, sizes, speeds, colors, interfaces, prices, etc. So, how do you choose? Let’s go through 5 simple steps which will ensure easy selection of the right camera for your application.

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Cognexcamera

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We looked at the available image sensors and the closest is a model with resolution 3092 x 2080 => 6.4 megapixel image sensor.

Learn the seven main lighting techniques for machine vision applications, focusing on image stability through lighting, lensing, and material handling

Note: The newest rolling shutter sensors have a feature called global reset mode, which starts the exposure of all rows simultaneously and the reset of each row is released simultaneously, also. However, the readout of the lines is equal to the readout of the rolling shutter: line by line.

Each type of application needs a different size of information to solve. This is differentiated by the minimum number of pixels. Let's again use monochrome options.

I believe that these five points will help you choose the most suitable camera. Are you still unclear? Do not hesitate to contact us or contact me directly: I will be happy to consult your project, needs or any questions.

Note: Each characteristic or application type presupposes a minimum number of pixels. It avoids the loss of information through sampling blurs.