Thank you @david_r! I was wondering because the number of lines was smaller in the output port of the Snipper than before. Aren't there supposed be more or at least the same number of lines in the output compared to the input, when they are "snipped"?

IR filtercap

I have created measures on a line geometry (thanks to @takashi, your tips are very helpful!). For every vertex the measures are attached to the geometry. In my attribute table, I have a column of the original measures.

If you send your line features to the Inspector you can see the measure values next to the coordinates, which I personally find very helpful when debugging LRS features. If you have applied a factor to your measures, you will of course also have to take that into account in your start and end location values (publicWFS_vst / publicWFS_bst).

IR-cut filter is a mechanical shutter design that blocks or delivers the IR – providing a high-quality image with true color reproduction – irrespective of day or night.

When the IR filter is turned off during the night or in low-light conditions, it helps IR and other forms of light to reach the CCD/CMOS sensor. The image sensor, in turn, absorbs enough light – and the camera turns to black-and-white mode, which is more sensitive to IR light.

Surefire Vampire head

With more than 20 years of experience in the camera technology space, e-con Systems has developed a wide portfolio of NIR cameras. PFB the comprehensive list of NIR cameras from e-con Systems.

To learn how to do number plate recognition using e-con’s global shutter camera and Raspberry Pi4, please have a look at the article Automatic number plate recognition using e-con Systems’ global shutter camera and Raspberry Pi4.

Perst 3

Unlike human eyes, camera sensors can detect near IR light outside the range of the visible spectrum. To make the image more similar to what humans can view, most OEM cameras are fitted with an IR-cut filter which allows only the visible light to pass through – thereby reflecting the unwanted IR.

A line is 1000 metres long. In the attribute table there is a column "beginning station" with the value 0, and a column "end station" with the value 800. The resulting line which I want to get should therefore be only 800m long, starting from point 0. If it would start at 400 and go to 800, the line would then only be 400m long.

Hope this piece of content threw some light into how an IR-cut filter works. If you have any further queries on the topic, please leave a comment. We shall get back to you as soon as possible.

Prabu is the Chief Technology Officer and Head of Camera Products at e-con Systems, and comes with a rich experience of more than 15 years in the embedded vision space. He brings to the table a deep knowledge in USB cameras, embedded vision cameras, vision algorithms and FPGAs. He has built 50+ camera solutions spanning various domains such as medical, industrial, agriculture, retail, biometrics, and more. He also comes with expertise in device driver development and BSP development. Currently, Prabu’s focus is to build smart camera solutions that power new age AI based applications.

Thank you @david_r! I was wondering because the number of lines was smaller in the output port of the Snipper than before. Aren't there supposed be more or at least the same number of lines in the output compared to the input, when they are "snipped"?

An ANPR system is expected to accurately recognize a vehicle’s plate number based on an image captured by an ANPR camera. It can be performed through the combination of steps, such as capturing the real image, locating and identifying individual characters on the plate, and recognizing the optical character. During the nighttime, a color camera with an IR-cut filter can capture clear images. Therefore, it helps identify the individual symbol image on the plate, the number of characters on the license plate, and the text luminance level (dark text on a light background or light text on a dark background).

If you are interested in learning more about NIR imaging, please have a look at the article What is NIR imaging and how do NIR cameras work?

I have calculated the measures, but how can I split the line on the measures I want, e.g. 800? Is there a way to create points on these locations, so that I can intersect them with the original line?

Nowadays, most of the CCTV cameras are equipped with IR illumination. The IR-cut filter is placed in front of the cameras with a night vision sensor. The human eye can’t notice the IR illumination light, but the camera sensor can view it perfectly. In monochrome mode, if the picture quality is good, the IR radiation has a major effect on the image in the daytime. Also, smart surveillance cameras with night vision are equipped with an IR cut filter to protect against rays, thus achieving an accurate image.

If you are interested in integrating embedded cameras into your products, kindly write to us at camerasolutions@e-consystems.com. You could also visit our Camera Selector to get a complete view of e-con Systems’ camera portfolio.

Hey guys, just to let you know in case someone has a similar problem: the proposed solution with the snipper transformer works perfectly. The rounding messages were just a warning, the result is correct.

This filter is controlled by a motor or with the help of an electromagnet. When the IR filter is turned on during the daytime, it helps to block IR – letting only the visible light pass through. This process is known as True Day Night (TDN) because it delivers true color images during the day and black and white or night vision images at night. It ensures that the image colors are not disturbed and generates a true representation of colors – as seen naturally by the human eye.

SurefireIRhead

Infrared (IR) is also known as radiant energy. It is electromagnetic radiation that has longer wavelengths than visible light. Normally, human eyes can view light with a wavelength ranging between 320nm – 760nm. The IR ranges between 700nm to 1000nm on the electromagnetic spectrum.

In recent years, day/night video surveillance has expanded beyond the traditional practice of monitoring only critical infrastructure. Generally, systems such as CMOS cameras and CCD cameras capture accurate images in daylight. Their sensors can detect near-infrared light that is invisible to the human eye. While this can be an important feature for night-vision recording –the infrared light distorts the colors of recorded images during daytime hours.

Thank you @egomm! I have just found the Snipper and from what I see it's the perfect transformer for this. I'm just not quite sure which setting would be more suitable: Measure (Relative to Start Point) or Measure (Value). My measures which I created with the MeasureGenerator were multiplied by a factor to get the appropriate length (if thats of any help).

In a video conferencing camera, the lenses should ensure high image quality and a large field of view (FOV) while maintaining a very low distortion at the same time. So, an IR-cut filter helps to produce accurate color images with color CCD or CMOS cameras. The filter blocks the transmission of IR light while passing visible light. It can be performed by absorption or reflection optical techniques. The absorptive filters are made with special optical glass to absorb the near IR radiation. In comparison, the reflection type filters are short-pass interference filters that reflect IR light with high efficiency.