Why is the AOSP camera worse than TW camera?

[jamesino]

I've been wanting to flash a AOSP rom instead of CleanROM, but I keep hearing everyone say ttaht the AOSP camera is worse than TW.

Is what ways is it worse? I don't care for gimmicky features like filters and stuff. Is the AOSP image quality, autofocusing, and how fast it can take consecutive photos worse than the TW? Or is it just missing fancy features like filters, smile detect, etc...?

If it's because it has worse image quality or noise or blur, feel like, the image sensor and the camera are hardware components, how can a different camera app create a worse image quality?

 

[meyerweb#CB]

To be clear, I don't know if the AOSP camera software is worse than the TW camera or not, so what follows is general, not specific. But the software has a huge amount to do with image quality. The sensor creates a "raw" image consisting a whole bunch (say about 8 million) of little red, blue and green dots. It's not really a usable image. The software takes all those individual pixels and applies tone mapping, so the range of tones from very dark to white matches, more or less, what our eye sees. It merges those individual colored pixels into groups of 4 (1 red, 1 blue, 2 green) to create a single "dot" in the output file. And it alters the color balance so that images taken under different lighting conditions (daylight, tungsten, flourescent, etc.) all look "normal" to you. It converts the raw image into a jpeg file, which can be viewed by typical image programs. Jpeg is a compressed data format (think mp3), and the more compression that is applied the worse the image quality (although small differences aren't very visible). Finally, an unprocessed digital image is surprisingly blurry. The software applies an algorithm to "sharpen" the image to make it look pleasing. And it may apply noise reduction to images taken in dim light and/or high ISO. And a whole bunch more.

All of this can be done well, or poorly. And different companies will have different approaches to how to adjust color, how much to sharpen the image, how much to compress the jpeg file, etc. And all of it affects the final image quality.