High Dynamic Range (HDR) Mode លើកាមេរ៉ាស្មាតហ្វូន អាចជួយបង្កើនសម្រស់រូបភាពបានល្អ ជាពិសេសរូបភាពពេលយប់ ដោយបន្សំរូបភាពជាច្រើនមានកម្រិតពន្លឺខុសគ្នា បញ្ចូលជារូបតែមួយ។
The dual camera on
smartphone implies a smartphone with dual lens either on its front or
rear end which looks exactly similar to human eyes. Dual camera
technology was introduced by Apple at its 2016 release of iPhone 7 Plus.
Despite
the presence of bump on the rear end of the smartphone, the quality of
the pictures taken by dual camera looks splendid. After Apple, all the
smartphone manufacturers are running behind introducing dual camera or
dual lens at the rear end for their respective upcoming smartphones.
Oppo crossed the line and introduced dual front camera in Oppo F3. The
competitors include
The main theme behind introducing this dual camera technology is to match the camera vision exactly with human vision.
Chromatic Variations (Dual Camera Technology):
One
camera is provided with RGB sensor and the other with a monochromatic
sensor. The camera with RGB sensor is used to capture color photos and
the other camera with a monochrome sensor is used to capture black and
white scenes. How was the final output crafted beautifully using a dual camera on the smartphone?
The
picture captured by a camera provided with RGB sensor filters the
colors. By doing so, the intensity of the light reduces. But the camera
with a monochromatic sensor is primarily targeted to capture the
intensity of light and sharpness at any given point of time.
That sounds good. But how do they contribute to the final output of the picture?
Here
come the hardcore image processing experts who can develop giant
algorithms to process the image to extremities. This will definitely
make sure the final quality of the image captured as pretty decent by
blending both the outputs.
Focal Length Variations (Dual Camera Technology):
The
dual lens in dual camera is extremely different compared to each other.
This is not only because they use different sensors to capture the
images but also the type of lens used.
One camera is provided with a wide-angle lens and the other camera with telephoto lens.
The classification is based on the focal length property of the lens.
On a given day, the lens with less focal length can spot distant objects
very clearly. This is how they are different from normal lens
1/ Wide angle lens refers to the lens with focal length less than that of normal lens. Mostly used for landscape photography
2/ Telephoto lens refers to the lens whose physical length is less than focal length. Mostly used for portrait captures.
Wide-angle
lens helps to cover vast area while taking a photograph, as said
earlier. A camera with wide-angle lens will surely get a better picture
without using panorama. Telephoto lens support zooming feature of the
digital camera. Due to its narrow view and longer focal length,
telephoto lens always helps you to see objects closer than they appear.
Image source: spaceindaver.files.wordpress.comWhen both these lens operates simultaneously, we can get a picture which can cover wide area as well as stay focused on goals.
Apple
iPhone 7 Plus is the one which is currently using both the techniques
like color sensor and focal length. The next release of Plus series from
Apple will definitely make this dual camera feature n-times better. The
added advantage for iPhone 7 plus is their optical image stabilization,
which can take better pictures in motion compared to its competitors.
How does dual camera technology work in Apple smartphones?
Apple
iPhone 7 plus implemented this technology with two different lenses in
2016. The two camera lens distributed the features of focal length and
chromatic sensors between them.
One of the lenses uses the
monochromatic sensor and concentrates on sharpness and intensity of
light, while the other ensures the color filters are applied. Apple
labels one with 23 mm wide-angle lens to capture landscapes and other
with 56 mm telephoto lens to capture portrait shots.
The combo of
both these will make iPhone 7 Plus in producing excellent images which
make photographers forget their DSLR’s frequently.
How does dual camera technology work in LG smartphones?
Even
before iPhone comes up with dual camera technology, LG experimented
with it while introducing G5. Even though the results of launching G5
seems bitter, LG doesn’t want to give up introducing this dual camera
feature in G6.
The difference in implementation of dual camera
technology between Apple and LG is the focal lengths of the lens used.
LG provides two different chromatic sensors for the dual lens, but there
is not much difference in the focal lengths. The final output of the
photograph taken from this dual camera provides a significant amount of
distortion at the edges. This is because of usage of dual wide angle
camera lens.
How does dual camera technology work in Oppo smartphones?
One
of the highlight specs of Oppo’s latest smartphone (Oppo F3) is the
dual front camera. Many smartphone manufacturers experimented with the
dual rear camera, but oppo has taken initiative in introducing dual
front camera.
Yet this is not the perfect implementation of the
dual camera technology. Because the front camera mainly concentrates on
selfies and groupfies. The emphasis was majorly on capturing the wide
angle images. The normal lens comes into picture while taking selfie and
the wide angle camera lens comes into picture for taking groupfie.
Advantages of the dual camera in a smartphone:
1. Focus
This
can be achieved before taking an image as well as after taking the
image. The sharp auto-focus feature helps while shooting a picture, the
re-focus option helps you set the focus even after taking the picture.
2. Perfect Bokeh effect
Best
recommended feature by digital photographers. It requires a huge set of
hardware to be carried by the photographers to get this kind of images.
But with the stitching of two different techniques and the professional
image processing algorithms, this becomes as simple as choosing an
effect from the displayed list.
3. Zoom
The telephoto lens
helps to focus an object at infinity. The same helps here to provide
distortion less optical zoom up to 2X and digital zoom up to 12X
4. Image quality
With
the two chromatic sensor cousins side by side, no human vision can be
better than theirs. The final impact of the gigantic image processing
algorithms on the captured image will pacify the viewers.
Disadvantages of the dual camera in a smartphone: Looks bulky (camera region)
Incorporating
two camera lens at the rear end of the smartphone will definitely
require hardware design changes. On first look, it gives the bulky
appearance. But going forward, with the brainstorming of the innovative
design teams at tech giants will surely come up with better placement.
Let’s wait for new releases from Apple as well as its counterparts
before compromising on the look of the smartphone.
Come out of the illusion, dual camera = 1 front camera + 1 rear camera. Since the dual camera in the smartphone
is the cutting edge technology which is trending and challenging
feature for all the smartphone manufacturers to incorporate. Having a
thorough understanding of this dual camera technology will surely help
you in choosing the trending smartphone available in the market. Hope
you are clear with this dual camera technology. Raise your voice in the
comments section, we will definitely help you out.
ប្រភេទកុំព្យូទ័រនិងឧបករណ៍អេឡិចត្រូនិកជាច្រើននាពេលបច្ចុប្បន្នរមែងមានរន្ធដោត
USB ហើយវាក៏បែកចែកលើការប្រើប្រាស់ខ្សែ USB Cable ជាច្រើនបែប
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