I was trying several mobile phones these days and got interested in displays. The following is what i've learned from my experiences plus online information:
It is a very easy work to tell the quality of a display, whether it is equipped on a TV or computer, or a smartphone. Just start up the device, have a look at the user interface, and you’ll get a rough impression, which, in most cases, is true to truth in the end. But there is always someone playing tricks to convince you that his display, which is not good in fact, is good, especially on the Internet.
While most people may not trust advertising maps made by CorelDraw or perfected by Photoshop, reviews do have influence on their choices. If you are going to buy a cheap phone from China, online reviews may be the only path for consultations. Unfortunately, neither all customer reviews come from real customers, nor all professional reviewers tell the whole truth.
For example, two phones with different display resolutions don’t look too different in a photo taken beyond a certain distance. Resolution, such as 1280x720 pixels, means the number of color points (pixels) that compose an image. The more pixels, the more details of a picture are shown, but when the distance between your eyes and the screen is long, the details are not so distinguishable. In most cases, we use mobile phones in a close distance.
A little theoretical? OK, I’ll compare two phones of the same 5-inch screen size but different resolutions for demonstration, namely, Axgio Neon N1 with 1280 x 720 display (HD or 720p) and THL T6S with 854x480 (480P).
I downloaded a 1920x1080 (Full HD or 1080P) picture from the Web and put its copies into both the two phones aforementioned. It’s hard to see how the Neon N1 has better performance than T6S in the first photo when my camera was held a little far from them. But in the second photo, the grass is sharp on Axgio Neon N1’s HD display, while it is a mass on THL T6S.
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Well, apart from grass, there are some scenes with smooth surface to obscure the gap between high and low resolutions even in close look, such as the sea. Smooth surface means that the colors of neighboring pixels are very similar or the same, thus the reduction in pixels may not affect the visual impressions very much.
But believe me, your eyes are more sensitive than cameras to such changes, which can be better defined in macro photos. Now you can see that the Neon N1’s 720P display has high integrity while there is mosaic with the T6S’ 480P resolution.
An HD display has about 900 thousand pixels ( 1,280x720=921,600), while a 480P display has only 400 thousand. Apparently, pixels are one time more closely arranged on a 720p display, where it’s not very easy to distinguish one pixel from others. On the other hand, there is no doubt that 480P or 540P (QHD, 960x540) screens deliver granules to your eyes in daily use.
Macro photos may be the best way to show display quality in the aspect of sharpness. For example, displays with the same face-value resolution may have varied performance in practice, while a responsible reviewer may use macro photos to make the disparity visible.
OK, let me add a 1080P display from Huawei Honor 6 before my close-up lens for a conclusion: 480P and QHD, with obvious granules; 720P HD, smooth; 1080P FHD, impressive.
I didn’t mean to say THL T6S was equipped with a bad display. On the contrary, it performs quite well at its native resolution among Chinese phones, just like Axgio Neon N1 and Huawei Honor 6.
Besides real resolution, another factor that concerns users is color. If you ever got interested in photography, you would know that color is highly vulnerable to camera settings. If a professional reviewer modifies settings to enhance contrast or saturation, it’s impossible for ordinary consumers to discern that.
But if someone plays the comparative trick, there is a way to tell. We know that no display can avoid color shift when it is viewed in an acute angle, and it’s where a dishonest reviewer can deceive consumers. He may let his camera and desktop form an acute angle, put a well-reputed phone at the far end, place an advertised phone in the center of the scene, and then shoot a picture showing the false impression that his phone is as good as or even better than the real excellent one.
I’ll still use two Chinese phones to demonstrate the trick. In the first photo, when Axgio Neon N1 was located in a bad place, it looks worse than Cubot X6 (720P display, too). But when my view angle is vertical to the desktop, you can see that the N1 is truer to life.
Again, I appeal that all professional review sites should use macro photos to show display colors, because in such a distance, color shift can be neglected.
Related
Hi all!
All ok?!
I create this small text for a Brazilian Android Forum, called BrasilDroid, so I would put here in XDA too.
It is about the quality of our cellphones cameras and the quality of them.
A lot of definitions :
What is Photography ?
Literaly is write with light. The term is derived from Greek. photos(light) and graphos (drawing). So, the basic premise for take a picture is... Light!
What we need to take a photo?
For take a picture we need a camera with lens and film, that in digital photography is the camera sensor.
Pixel and Resolution
If we make a enlarge expansion in a photo we see various square points that make the image, this points are called Pixel. This is the minor measure that we have in our photos.
The photo resolution are directy connected to the Pixel. In a photo that have dimensions of 1920x1080 your resolution is 2,736,800 px or 2.1mpx.
Roughly, resolution is the photo area.
Quality vs Pixel
Many peoples confuse the camera quality with the amount of megapixel available.
But, quality not linked with quantity.
The Camera quality is linked direct to height of sensor and how the sensor handles the lack of light.
When we pont our camera for the scene and shoot a "curten" open and leave the sensor exposed to light. In this moment the sensor catch the light. Immediately after the "curten" close and the image is recorded.
While the obturator(the name of "curten") is open the sensor is capturing the light, so, smaller the area for capture minus details can be captured and more digital interference need to be used to create the image.
Let us consider two sensors:
Sensor 1 - 7x5mm.
Sensor 2 - 20x14mm.
These sensors be in two diferents cameras with 5mpx of resolution.
When we take a photo in 1920x1080 (Full HD) the sensor try capture the light of all scene usin 2.1 milions of points.
In First Sensor the pixel be very close, the area is smaller, making the size of these pixel be small, soon, the amount of detail that each of these pixels will be store are small.
In Second Sensor the pixels be more separated, the area is bigger, the pixels can capture mor information of the light.
The final image will be the same resolution in each sensors, but, the sensor two store more information. Considering the size of this sensors, Sensor two will store three times more information.
In other words, a small sensor need perform a big effort for store all information, are many pixels in a small area. This makes the camera need interfere in capture, generating small points between the pixels. In these moment we have other problem ... Grain...
So, for what serve the pixel ?
Enlarge.
The more megapixel used in a photo greater be your dimension, so, more we can enlarge the picture keeping the proportion without loose information.
Why the photos look better on cellphone than on the computer?
That we see in screen of cell is basically a photo in a lower resolution than the real resolution, these lower resolution hide photos imperfections and some LCDs can make a bigger shine or contrast in the photos, like the AMOLED.
How to take better photos with cell ?
1 - Don't use the max megapixel
If you are shoot with cell, certainly, be a big image don't is your objective, so, you can take photos in small resolution. In Cell with 5.0mpx take a picture with 3.2mpx only bring gain...
2 - ISO
If the camera have manual ISO, try to use the lower ISO number, the higher ISO more digital inteference, and more grain...
But, the low ISO makes the scene need more light.
3 - Prefer shooting statics objects or don't shake
Most of cellphones don't allows the manual configuration of Obturator Speed. The camera software try to choice the better speed for the scene.
The phone try balance the speed with ISO and aperture, many times the speed is going down. And slow speed is synonymous of blur photo.
How to get around this? If possible, increase the ISO or increase the exposure compensation. And let the phone as still as possible.
4 - Using flash
Flash, very polemic, but, in cell cameras can be a great ally.
When use the flash your light make that the scene freeze, reducing very much the slow speed problem.
Obvious, xeon flash is better than Led.
5 - Modify the pr proportion
Case the camera be proportion adjust try choice the best of each photo.
Proportion 4:3 = 1.333
Proportion 3:2 = 1.5
Proportion 16:9 = 1.77
To calculate the proportion just divide the bigger side by smaller.
Para calcular a proporção é só dividir o lado maior pelo lado menor.
A Photo with 2048x1536 px be : 2048 / 1536 ~= 1.333
So, the resolution 2048x1536 have proportion 4:3.
To improve the photos working with the proportion the best way is using photo's editors.
Size of Sensors:
Digital Cameras :
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(http://www.iif.com.br/site/2010/10/mitos-verdade-digital/)
Iphone and S3
(https://forum.lowyat.net/topic/2708421/+200)
They noted that the lower sensor of a digital camera 1/2.5 (0.4) is ~ 25% higher than the sensor of Galaxy S3 1/3.2 (0.31)?
Guys, it is clear that we can take great pictures with our cell phones, however, the limitation of the hardware and the sensor will always do that to that quality is not expected.
After all that, you imagine how absurd it is to have a mobile phone with 41mpx resolution?
A decent camera, that resolution costs over $ 20,000 and has a huge sensor, called medium format!
I propose a challenge. I take two pictures with my Ace 2. One with 5.0mpx and other with 3.2mpx. Both are in the ratio 4:3 with 100% Crop.
which of the photos was made with 5.0mpx and what was done with 3.2mpx?
Photo one :
Photo two:
That is, questions, suggestions ... and let the discussion!
:laugh::good:
Hello, everybody. This is my first thread. Although my English is poor, I really want to share my viewpoint with you. Please bear with me.
Basic specs:
Display: 5’’ IPS QHD 960x540
CPU: MTK6582 quad core 1.3GHz
GPU: OpenGL ES 2.0, Mali-400 MP2
RAM: 1GB
ROM: 8GB+MAX support 64GB Class 10 Micro SD Memory Card
Camera: 8mega-pixle main camera + 2mega-pixle front camera
Dimensions: 143 x 72 x 7 mm
OS: Android 4.4.2
Battery: Li-ion Battery 1950mAh
Price: $121.99
Unboxing:
The box is simple including two parts. There are USB cable, power charger, user’s manual and screen cover. These accessories all are necessary.
View attachment 2818114View attachment 2818115
Performance:
View attachment 2818118
Design:
It’s too thin that is my first impression when I saw it. The thickness is only 7mm so that we can put it into wallet. The USB jack and headphone jack is in the top. Maybe the headphone is a little small; it’s not easy insert the headphone. The frame is made of metal and we can find the power button and volume buttons on it. However, it is difficult to press these buttons down. The features of the back include main camera, dual LED light, logo and speaker. We can remove the rear cover to replace battery, SIM and Micro SD. It’s a great design to somebody who wishes to get long battery.
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Display:
5’’ IPS QHD 960x540 display. It is enough big to view video with 5 inch screen. However, the definition is disappointing because it’s only 960 x 540. Most of the IPS display is good at view angles. Of course, this display also is great at view angles. What’s more, the brightness is OK. We can see the text clearly even in high light. As for color reproduction, it’s amazing.
Camera:
There are four modes in camera including Panorama mode, Face beauty mode, Live Photo mode and Normal mode. In the Panorama mode, we can take many photos, and then combine with these photos to get a bigger photo. If we want to become more beautiful in photo, we should choose the Face beauty mode. The live photo mode is interesting. In this mode, we can get a live photo when take photos. We can adjust the white balance and ISO to adjust to different scene for better photos in normal mode.
View attachment 2818122View attachment 2818123View attachment 2818126
We review the phone in normal light and low light. The result is disappointing. Speed is slowly in normal light and the resolution is not enough. It’s worse in low light. The camera even can’t focus in low light and there are so many noisy points. The sample is dark when ISO is 400. And then we adjust the ISO to 800, the sample becomes light but more noisy points. It’s only praiseworthy that taking and saving photos is quickly.
View attachment 2818120View attachment 2818121
OS:
The ROM makes some improvements base on Android 4.4. It’s very smooth and concise on the whole. There are many beautiful wallpapers for choosing. Many interesting widgets are prepared for you to show your character. The interface of music player is succinct and tone quality is well. Besides, it’s very smooth when we watch video even we speed video. However, the phone became hot after watching video long time.
There are many useful pre-positioned apps such as Gmail, Maps, and Sound Recorder.
View attachment 2818127View attachment 2818129View attachment 2818131
Battery:
The thickness is too thin to the battery is only 1950mah. However, the screen resolution is low and MTK6582 is power saving, so you can charge it once a day even longer time.
Conclusion:
Elephone P10C is stand out at design and ROM, but the camera need to improve. In my opinion, the P10C is worth owning.
Not bad for the budget phone it's meant to be.
It's so powerful.
MissionImprobable said:
Not bad for the budget phone it's meant to be.
Click to expand...
Click to collapse
It's so powerful.:laugh::laugh::laugh:
What about the GPS?
Thank you!
I ordered one today for 109 USD + shipping 22 USD =131 USD. Can get back to you guys when I have tested the GPS and so on. WIll have it in 8-12 days
kamikado said:
What about the GPS?
Thank you!
Click to expand...
Click to collapse
GPS work not. Fix +- fast . Position hold not! Accuracy +- 5,10,50 m.
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Smartphone photography has made tremendous progress in recent years, especially in camera sensors -- the soul of any digital camera. Camera sensors determine the clarity of your photos and how large you can scale them up. From 300,000 pixels many years ago, to today’s highest 48 million pixels, sensors have advanced at an astonishing speed, and smartphone cameras now rival even high-performance SLR cameras.
Sony IMX586 and Samsung GM1 are the only two 48-megapixel sensors in smartphones on the market today. Although both are technically 48MP sensors, their capabilities are not equal, as image quality depends not only on the number of pixels, but also how the pixels are arranged. When this is taken into account, Sony IMX586 has the edge, as it is able to transform its pixel structure to achieve true 48MP photography. On the other hand, Samsung GM1 behaves more like a 12MP sensor due to its less effective pixel arrangement.
To understand the difference, we need to understand how a sensor captures light and creates an image. There are millions of picture elements (pixels) on an image sensor. Pixels can detect the intensity of light, but they cannot distinguish colors. An image sensor without color filters can only produce black-and-white photos.
To produce color photos, the RGB color model is used – in which red, green and blue light are added together in various ways to reproduce a broad array of colors. One method is to put red, green, and blue filters in front of three image sensors respectively and combine the images to create one photo. But this is not practical for smartphones, as it makes the cameras very bulky and expensive.
In 1974, Bryce Bayer invented the Bayer filter which employs what is called the "Bayer Pattern," a checkerboard-like arrangement of red, green, and blue pixels on a square grid of photosensors. This pattern of filters is placed on top of a single image sensor to make each pixel respond to either red, green, or blue light, allowing digital cameras to capture vivid color images. Then, a computing process known as demosaicing converts the detected image to a single full-color image. Most digital image sensors use the Bayer filter today.
Both Sony and Samsung sensors use Bayer filter arrays to capture light and produce photos.
Traditional Bayer arrays use a 2x2 array (2 green, 1 blue and 1 red). The Sony IMX586 sensor uses the Quad Bayer color filter array, where adjacent 2x2 pixels are arranged in the same color, making high-sensitivity shooting possible. During low light shooting, the signals from the four adjacent pixels are added, raising the sensitivity to a level equivalent to that of 1.6 μm pixels (12 megapixels), resulting in bright, low noise images.
When shooting bright scenes, such as an outdoor environment during daytime, the built-in, original signal processing function performs array conversion (see diagram below), making it possible to obtain high-definition 48 effective megapixel images in real time. Thus, the Sony IMX586 can produce true 48MB photos.
Based upon the data revealed by Samsung, the GM1 sensor adopts a similar Quad Bayer color filter. But it lacks a conversion mechanism, so every 2x2 array can only recognize one color and output data together. As a result, while the Samsung GM1 sensor has 48 megapixels, it actually behaves like a 12-effective megapixel sensor. According to the specifications, the GM1 sensor can only support photo resolution up to 4000×3000, i.e. 12 megapixels.
The main difference between the Sony IMX586 and Samsung GM1 sensors is that the former can produce true 48-megapixel photos by transforming its pixel structure, while the latter lacks this capability. In the end, photos produced by the Sony IMX586 are superior, having higher resolution and clarity, and retaining more details even after zooming.
Nice info
But still, Quad Bayer to normal Bayer conversion isn't effective,
Sony sensor is better for 2x digital zoom with 12mp resolution, while Samsung will give a cropped 4mp
I am provided this device as courtesy of Honor UK. I am going to express my thoughts and impression on Honor 9A. This is my personal and honest opinion of the device.
Before I jump to photography aspect of the Honor 9A I would like to discuses some other aspect of this device. some of features as follows:
1. 6.3”, 88.4% screen to body ratio full view 20:9 aspect ratio display of LCD panel. ( very computable to watch video contents.)
2. Magic ui 3.1 that is honor skin of android 10 out of the box. (latest operating system, many flagship of previous years are still on the list to upgrade to this)
3. 5000 amh battery (all day long battery) and ‘Ultra Power Saving Mode’ in case the device need to run longer in minimum power (12 hours on 5% battery power)
4. 3.5 mm headphone jack ( now we can use our favourite headphones)
5. FM radio without need of DATA ( Yeah!! Just need to plug in headphone to work as antenna)
6. Super comfortable hold and use, slim design with mate finish sides for strong grip.
7. Biometric and facial lock system along with traditional pin and pattern unlock system.
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Camera
Honor 9A comes with triple rear camera and a front selfie camera. Rear cameras are 13MP Main camera along with 5MP ultra wide angle and 2MP depth sensor camera. I will summarise these camera as average in general circumstances. However if you consider the price range of the device it is above average. It is known fact that Honor devices comes with awesome camera performance. This device in particular is not focused on the camera hardware section. Moreover it lacks many popular software features of Honor camera software. This does not mean it has bad camera but it feels weaker in comparison with other Honor Device. I will simply explain good and bad aspect of the camera in my opinion in few important aspect of photography.
General photography
Its simple basic camera very useful for armature mobile photographer. Simple and easy to use. Picture quality is good enough for general use such as social media post or keeping it for memory. Images has good amount of detail and clarity. Pictures are slightly over saturated so it appears vibrant. This is perfect for general users who don’t have much knowledge of post editing.
Portrait
This device is able to capture good portrait pictures. I would not consider this is above average. It has decent amount of background blur on portrait images. I was expecting more than this considering it has 2MP depth sensor lens. However I personally did find much benefit of having that extra lens. So the portrait images are acceptable. Moreover, it does some post processing that improves image quality.
Close up/macro
It is surprisingly good for close up photography. It’s 2MP depth sensor camera rally stands out when it comes to close up photography. There is also PRO mode section where we can manually control, focus, shutter speed, ISO and so on.
Video
Video quality is fine on this device. it is able to capture up to 1080P on 30 FPS. I personally like to take video with 60fps. It might disappoint some users who are not used to with video capturing cause 30fps requires good amount of balance on video capturing. 60 fps would be beneficial in such condition. However, when captured with good balance 1080p with 30fps is considered as good quality.
Light condition
This device takes good picture in good light condition. It may over or under expose on extreme highlight and shadow condition. Meaning if you take picture of a house at sunset it may darken entire house to bring light of sun set.
It has shown weakness in low light condition. Pictures contain some amount of grain at low light. It becomes very difficult to maintain quality in very poor light condition. Such as, darker room with table light. Having said that this is important to consider that this device is introduced as budget device and this level of low light quality need to be accepted as satisfactory.
Wide angle, this device has 5MP wide angle lens. Wide angle is very useful for landscape photography. When comes to landscape photography 5MP resolution is not that helpful. We would lose significant amount of details from image due to lower resolution. when using wide angle for close up images it produces good quality pictures. but majority use of wide angle is to capture more in single frame so higher resolution would surly benefit.
Negative
I have used Honor and Huawei device before so I am aware of some of revolutionary photography features of these devices. When comes to mobile phone photography I consider 3 things is must have Nightmode, portrait and light painting. Honor has decided to ditch these key photography features. Therefore I have come to conclusion that this device is not for serious photography. This might be true as this device is targeted to different demography that may not be much interested on top end photography features. If you are looking for device that is above average on photography than you should look for some other devices such as Honor9x pro, Honor 20 pro.
In summary, honor 9 A has various key features to meet your daily demand. Please read following great review of thee product my member of this community. If you are not into much into photography and just want a simple camera phone with simplified features than this device is for you. It is able to take good quality pictures ( main lens 1x) that does not need editing most of the time. User interface in the camera app is much simplified so it is suitable for entry level consumers.
Source: https://community.hihonor.com/uk/topicdetail/Honor-9a,-my-thoughts-on-Tripple-camera/topicId_23039/
Have had a couple of bright daylight shots come out like garbage, low detail low quality smudged detail. so just happened to look in settings and no HDR/+. Maybe I'm getting it mixed up with my previous pixels but could have sworn there were HDR settings in Google camera on the 6a?
Strange. Reddit says...
Google is even more cryptic.
Raw mode be your next and better option. Those will require post processing which is done using a photo app that has an adjustable contrast curve option.
Thanks! Raw wouldn't have helped this shot. looks like needed the stacking that HDR provides. making sure I'm not crazy, the option was there before, no? It's definitely still kicking in in some cases but seems somehow auto / Left up to googles algorithms. Unfortunately that leaves us with a lot of garbage shots
Compared to a Canon pro cam all smartphone cams are a pain to use and limited especially for setup options and speed. I lose a lot of shots because that. I never liked HDR's; a properly exposed shot doesn't need it. Raws give you at least 2 full f-stop exposure and WB correction.
No option to shoot multiple burst exposures at different exposure settings either on smartphones.
Even on my Samsung N10+ the HDR setting when toggled on will decide for you if it will be used. That can and does screw up shots when on... sometimes. No real control
Perhaps Google will update that missing feature soon. Rather sloppy of them. Not near as inept as their lame idea implement forced scoped storage though.
That's a bomb I'm still running Pie and 10 to evade that terror.
The issue is these tiny sensors. The photo stacking/ computational photography helps exponentially. When it doesn't kick in, it can be very bad. You're right RAW can definitely help some but there's only so much it can do. Here's two shots, one when the computational kicked in and the other apparently not. These were taken on the fly (my gf and her kid, not random people), so obviously not great composition just an example of what I mean.
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Not available for pixel 4a and above. It is default ON.
damian5000 said:
The issue is these tiny sensors. The photo stacking/ computational photography helps exponentially. When it doesn't kick in, it can be very bad. You're right RAW can definitely help some but there's only so much it can do. Here's two shots, one when the computational kicked in and the other apparently not. These were taken on the fly (my gf and her kid, not random people), so obviously not great composition just an example of what I mean.
View attachment 5770083
View attachment 5770085
Click to expand...
Click to collapse
That's not much difference.
On a raw file (or maybe even a jpeg) you could do that and better using an adjustable contrast curve with settable adjustment points. Takes a bit of practice and a color calibrated monitor.
Wow man, the difference is massive. Look again at the detail in all areas. Detail completely smudged out in the faces, the animal, the plants.
damian5000 said:
Wow man, the difference is massive. Look again at the detail in all areas. Detail completely smudged out in the faces, the animal, the plants.
Click to expand...
Click to collapse
Yeah just saw that. Not sure what the cause is though. The face is messed up. I suspect it's the jpeg processing algorithm.
It's also the animal, the plant life to the right can be seen easily. This is what I'm talking about in regards to the photo stacking, what enables these tiny sensors to get decent IQ.
But also, looking at the exif, the bad shot is at 1/7200 ISO 700, that's insanely dim for these little sensors, I'm assuming the digitally brightened. I'm GUESSING I may have been moving (or they were moving) and Google algorithm decides to snap a "sport" shot rather than have something completely unusable? In the case, if so, also no time for stacking in a "sport" shot. Just a guess.
The other 1/400 ISO 45, though I'm not sure how they calculate the latter with stacking/HDR. Whether it's an average of all shots or what.
damian5000 said:
It's also the animal, the plant life to the right can be seen easily. This is what I'm talking about in regards to the photo stacking, what enables these tiny sensors to get decent IQ.
But also, looking at the exif, the bad shot is at 1/7200 ISO 700, that's insanely dim for these little sensors, I'm assuming the digitally brightened. I'm GUESSING I may have been moving (or they were moving) and Google algorithm decides to snap a "sport" shot rather than have something completely unusable? In the case, if so, also no time for stacking in a "sport" shot. Just a guess.
The other 1/400 ISO 45, though I'm not sure how they calculate the latter with stacking/HDR. Whether it's an average of all shots or what.
Click to expand...
Click to collapse
The cam sensor temperature can also increase the noise floor level. With the lense and sensor size as small as they are it's a wonder they can do this good. The narrow depth of focus doesn't help things either.
Cam shake may also play a role as well; the lighter the cam the less stable the shooting platform. Smartphones have no handholds. Not near as easy to shoot with compared to a pro cam and lense that weighs 5 pounds. The larger lens are easier to shoot because of the added weight.
Smartphone cams are convenient but damn I lose a lot of keepers because of them in shutter lag alone.