- 1 Using Apple iPhone Front Facing Cameras
- 1.1 How to See How it Works With an iPhone 4
- 1.2 How Do Security Cameras Work? Include IR LEDs Hidden to Humans But Light Up Scene With Light
- 1.3 Black and White Camera Filters
- 1.4 Can My Digital Camera See Infrared radiation That is Only Beyond Red Light?
- 1.5 Silicon Based Sensors Are Sensitive To Far Infrared
- 1.6 How White Spots Look Like – Discover The Reality of IR Photography?
- 1.7 Infrared Digital Cameras
- 1.8 Understanding The Demosaicing Process
- 1.9 TV Remote Bright Irradiance
Using Apple iPhone Front Facing Cameras
The front camera of iPhone camera which is facing you allows you to see Infrared. The back camera of the iPhone has an IR filter which filters infrared.
Open the camera app and point to any TV remote and you will see white light when depressing any button of a TV remote of any other kind of remote with an IR light on top of the remote.
Below are the list of iPhones models that can see Infrared
iPhone 4 = front camera can see Infrared
iPhone 7 = front camera can see Infrared
iPhone XS = front and back camera can see Infrared
iPad Pro (9.7″) = front and back camera can see Infrared
iPhone 6 = front and back camera can see Infrared
iPod Touch 5 = front camera can see Infrared
iPhone X = front and back camera can see Infrared
In the world of digital photography, using iPhone front facing cameras is one of the best options for those that want to take the most out of their photography experience.
One of the best features of this device is that it will allow you to see everything that is going on with your subject without having to turn away from the view in order to do so.
This makes the camera perfect for those that like taking pictures while moving around or trying to catch a moving object in the lens.
Some of the best features of this particular camera include the fact that there is no need to worry about getting obstructions in order to get a good shot and that the camera will not only allow you to see the subject but will also allow you to focus directly on it.
In order to take full advantage of your iPhone’s amazing capabilities when it comes to photo taking it is very important that you know exactly how to use the iPhone’s front facing camera.
The first thing that you need to know is that when you are not directly looking at your subject you should move your head to one side slightly in order to gain some eye contact.
In order to accomplish this, you simply need to raise your iPhone up so that you are holding it in the air just above your eyes.
Once you have done this you should focus on looking directly at the camera in order to maximize the amount of light that is coming through the camera.
How to See How it Works With an iPhone 4
You might be asking yourself “How is FaceTime working with an iPhone, and doesn’t the camera have to have an infrared filter so that I can see through the camera?”
This is a good question, and the first thing you need to know is that most cameras on the market do NOT have an infrared filter built in.
FaceTime uses an IP camera that communicates with your iPhone’s camera via a digital audio signal.
So basically instead of dealing with all of those wires connecting the camera to the computer and back up to your computer, you’re only dealing with a simple digital audio signal.
There are two benefits to this though.
The first being that FaceTime works great with streaming video from websites such as YouTube.
Because of the video compression algorithms the camera has to work extremely fast, and FaceTime is at that point pretty good.
With YouTube however, because there is such a delay between when the video is shot, and when it appears on screen, it’s tough to make a nice long video with the computer and FaceTime.
How Do Security Cameras Work? Include IR LEDs Hidden to Humans But Light Up Scene With Light
If we need a clear demonstration of how security camera systems work then let’s have a look at infrared security cameras, they are so much more powerful than their counterparts which means they have a much better ability to give us clear images and video.
An Infrared security camera uses extremely sensitive integrated circuits which can capture the heat energy of a human body and convert it directly into visible light.
Most cameras use an LED (Light Emitting Diode) on board but the best cameras usually incorporate IR LEDs.
For years now companies such as Panasonic, Sony and Samsung have been using infrared technology to capture high resolution images and video.
They also use other highly effective methods such as image stabilization, image correction etc.
We know that CCTV cameras are used to monitor suspicious activities so by capturing movement we can then see exactly what the person was up to.
So how exactly do security cameras work and what sort of results can they achieve?
There are various cameras on the market from passive Infrared Night Vision CCTV cameras to hard wired cameras using LIDAR.
The passive infrared security cameras are a great choice as they are not prone to the temperature extremes of a building and are able to work in the dark.
Black and White Camera Filters
It is now possible to see what is happening inside your digital camera’s IR filter.
A little known fact is that when you are taking photos using a black and white camera, the IR filter in your camera IR filter is blocked from the infrared light that is sent to your sensor.
If the camera lens is not an infrared lens then this blocking of the infrared light will not occur and your pictures would be perfect.
Have you ever been taking pictures with your black and white camera and suddenly got distracted by something and had to change the camera?
Have you ever stood there for a minute or two and just forgot about the photo you just took? This is all due to your IR filter in your digital camera.
Can My Digital Camera See Infrared radiation That is Only Beyond Red Light?
The camera can see infrared radiation that is just beyond red light from 700nm to 915nm? The camera and red are in the same room, yet it seems to not be a red light at all? Can you see infrared radiation that is only beyond red light from 700nm to 915nm?
If you look at the spectrum of visible light with your eye, and look closely at the visible light, you will see a few things that are red.
Look closer still and see infrared.
This is the kind of thing that the camera can see infrared radiation that is only beyond visible red light.
Can you see infrared radiation that is only beyond red light from this distant? You betcha, that’s why you have red, blue, and green waves.
You are probably asking, “Why can’t my camera see infrared radiation that is only beyond red light?” Well, the answer lies in the infrared filter on the camera.
The infrared filter doesn’t allow red light through, and only allows green and blue light through.
If you use the camera with a red filter, the camera will ONLY see infrared radiation that is outside of the visible red light range.
If you use a green filter, the camera will ONLY see red light, which will force you to think that the red light is being reflected.
Silicon Based Sensors Are Sensitive To Far Infrared
The invisible ones are mostly sensitive to far-infrared (FIR). But this is not true in all the devices. The visible ones are mostly sensitive to NIR. The silicon-based sensors in virtually all visible cameras are sensitive to near infrared (NI) as well.
These visible devices are often sensitive to the far infrared rays.
The visible light does not produce far infrared rays, and hence the visible parts of these devices are not sensitive to the far infrared rays.
So these visible parts of the cameras do not respond to them either. The silicon-based detectors can also detect the infrared rays produced by the sun. All such sensors are not sensitive to the far infrared rays.
You should buy a camera sensor having the above mentioned features.
The silicon based sensors will be very useful for you and your business in the areas of surveillance, security, and crime monitoring.
You should use them for the detection of crime before it occurs and prevent it from occurring. sensors in any area of your business premises. You can either mount them on a wall or a floor stand or place them on a vehicle stand.
How White Spots Look Like – Discover The Reality of IR Photography?
IR appears as white light to the camera, desaturating whatever colour present. As described by Wikipedia: “The electromagnetic spectrum of an IR wave is similar to the optical spectrum of visible light, but without pass-bands or edge effects”.
In other words, while visible light contains multiple colours, IR only has one, red.
The wavelength of an IR laser is generally long enough to penetrate many objects, but short enough to not heat up any of the matter it comes into contact with.
To produce IR, a laser generates a beam with a high frequency that has greater energy than the wavelength of visible light, and therefore passes through many objects without heating them, while visible light only needs a relatively short wavelength to do significant damage.
Because infrared lasers are so long and powerful, they do not require an extremely large photo area in order to capture a substantial amount of IR, which makes them very ideal for use by military and police units.
While the quality of the IR picture can be improved by using a wider aperture (wide apertures), this also increases the amount of scattering of light which can reduce the depth of field and cause blurry pictures.
This effect can be overcome by using wide angle lenses and by using image stabilization, where the camera is moved into a stable position, usually far from the subject, and then the picture is taken with the camera moving into that position.
If you are intending to use IR photography for surveillance, it is important to note that although the camera will appear as if it is focusing on the subject, this is actually the IR lens reflecting off of objects in the foreground and onto the camera sensor.
It is important to note that white spots are not caused by refractive errors, as those can appear in normal images.
Instead, white spots are caused by absorption, due to either a low or high absorbing lens.
Therefore, it is important to only use a high power optic that is capable of producing good levels of IR at the required shutter speed.
Infrared Digital Cameras
Infrared digital cameras are also referred to as night vision cameras because they use infrared illuminators to capture images at night.
The technology that is incorporated into these cameras is rather ingenious in its own right.
Many people do not know that it is actually possible to see in the dark with the use of an infrared illuminator.
If you were to look up at the stars from space or observe terrestrial objects in the night sky using your naked eye you would not be able to see through the darkness but an IR camera can.
What makes these cameras so unique are the fact that they use a series of LEDs behind the lens to capture the infrared light that comes through the front of the lens.
These illuminators are completely invisible.
There is no reflection from the surface of the earth that is reflected from the illuminators behind the lens.
When you look through one of these cameras and look directly at the back side you will see the backside of the illuminator which is filled with a neon green.
This is the very same green that is used behind the lens in everyday cameras.
The illuminator behind the lens uses the infrared energy emitted by the human eye and converts it to electrical energy, which is then captured by the LED behind the lens.
An IR digital camera is perfect for security and surveillance applications because they are highly effective at recording video footage without a need for extra equipment.
When these cameras are used in conjunction with a video recorder, the time spent recording can be greatly reduced since there is not a need for continuous film.
These cameras are also extremely beneficial for monitoring areas such as schools, airports, banks, and even inside the home where vandalism and theft are common occurrences.
Understanding The Demosaicing Process
The process called Demosaicing allows the camera to figure out the colour of an object with a certain amount of black and white.
If the light is more than one colour then it is shown as black.
It used to be very difficult to see an object when using only black and white, which is why the camera was set up so that the pixels were all different colours.
Now with computers it is easier to see an object because all the pixels are now different hues, but this process still has its drawbacks.
In the past, if you wanted to make more than one colour, you had to make extra passes over the image until all the colours came out perfectly.
The first demosaicing process was a very slow process that took over two weeks to complete.
The second, much faster demosaicing process made it possible to see objects in a matter of seconds.
You could demosaicing by hand very easily, but it was very difficult to get a perfect result. Today, computer-aided demosaicing is a much faster process that can give you extremely accurate results. Most of today’s demosaicing equipment operates at the level of a CCD sensor.
TV Remote Bright Irradiance
When you buy a TV, one of the things you may notice is the TV remote control – this is a special device that lets you change your TV’s buttons and navigate through the menus.
The infrared light beam frequency that TV remote controls use is much more precise than the one used by radio receivers.
When you move your TV remote up or down, for example, the infrared light beam that reaches your TV can detect the difference in the beams between the two and adjust the remote accordingly.