Hello everyone, I'm a 19 yr old student, the average camera user and i just recently started to dig deeper into photography as a friend and I had a heated debate over the "ultrapixel" marketing of the HTC one. As a student of science, i would like to have a better insight on the camera and the photos obtained.
So far this is what i understood, feel free to correct me and contribute in this thread.
- A true view (what we see) is represented/divided digitally and displayed as a group of pixels.
- What i understand from picture quality is : Pixel density, levels of noise, size and color reproduction.
- The ideal image or picture consists of infinite amount of pixels.
- The eye cannot distinguish more than 300 ppi pictures. (unless u have an augmented eye or spyglass )
- A camera sensor basically acquires the data from light photons to reconstruct a "false" image which we see digitally.
- The camera sensor is a grid containing photosensors called sensels. The amount of sensels = number of pixels? (not sure)
- Each sensel can record only 1 kind of photon from red, blue and green due to technological limitations? So a filter (often the bayer filter as it contains more green to which the eye is most senstive) is used to capture the electrical output of 1 color of photon. The other colors are interpolated by uhhh mathematical means or softwares,.. i dont really know...
- Apparently a larger sensor is better because it captures more light overall and better sampling is done for individual pixels?
- Larger sensels capture more photons meaning that each individual sensel reproduce a more accurate pixel in the picture. Thus the picture contains more detail per pixel which improves the quality. Larger sensels also means less noise being captured and thus clearer pictures are obtained when taking pictures in the dark.
So does this mean a sensel the size of the tower of Eiffel would reproduce a super low noise highly detailed pixel? Or are there other factors which must be taken into consideration.
- Usually its the size of the sensor which limits the quality of pictures in many devices such as mobiles. Internals of phones do not allow large sensors and thus the balance between sensel size and quantity (for megapixel marketing) is the main factor worrying producers.
- Megapixels is just the amount of pixels (or degree of sampling of the real life visual) forming a picture, so the bigger the megapixel for a picture of fixed size means better quality as the pixel per inch aka ppi increases. For the average consumer 200 ppi + is alright. Beyond 300ppi is ridiculous because the human eye cannot distinguish anymore. Larger megapixels also mean a clearer image (not blurry) is obtained when digital zooming as the real life visual has been sampled more.
I know that much only, i've been reading more about it, since i spent only 1 day reading about cameras and pictures. I just keep on getting doubts and certain answers are not obtained on the net, so i thought u guys would perhaps teach me some more
Thank you for being patient reading all this and helping out , i really appreciate it
So in conclusion was the ultrapixel technology advertising from htc a risk which turned out to be successful? Was it just a well made 4mp sensor(with larger sensels than usual ones) with good post software processing which gives out these "wonderful" pictures everyone speaks about?