Function introduction:
1. ISP (Image Signal Processing) is the image signal processing unit in the mobile phone on-chip system (SoC), mainly responsible for photo-taking. Its main function is to do the post-processing of the front-end image sensor output signal, and get the final results after linear correction, noise removal, bad point removal, interpolation, white balance, automatic exposure correction and so on. The existence of ISP can enable the mobile camera to restore the details of the original scene under different light conditions, and it can determine the final imaging quality of the mobile camera to a large extent.
2. At the same time, ISP chip can also realize face recognition, automatic scene recognition and other functions.
Note:
1. with regard to the relationship between CMOS and CCD, consult No. 002398 in the knowledge database "what is the relationship between CMOS and CCD in the camera, and what is the pixel representation of the camera?" for specific description
For the explanation of "SoC", consult No. 002391 in the knowledge database "what is SoC?"
the imaging quality of mobile phone with independent ISP chip is not necessarily better than that with integrated ISP chip.
2. ISP and CPU/GPU, not only the quality of the product, but whether the ISP chip and the CMOS can cooperate perfectly, ISP algorithm and so on will affect the imaging effect of the photo.
3. In addition, in addition to the ISP chip hardware algorithm, the software level of the algorithm can also improve the mobile phone photo effect to play a certain role.
4. After taking the photo, the camera will first generate the unprocessed original image in the machine, and after a series of compression and optimization adjustment, we will finally get the .jpg format picture file we see. And this depends on the software level of the algorithm, the quality of the algorithm will also directly affect the final film effect, such as image color, hue, noise reduction and so on, which is one of the reasons why the photos taken by different mobile phone manufacturers are different in color style orientation.
5. However, software is already the last compensation scheme, which plays a relatively weak role in the whole link. If photosensitive elements, imaging modules, ISP and other hardware are not available, no matter how strong the software algorithm is, it wouldn’t help. Only the strong hardware is very strong coupled with excellent software algorithms will add to the final imaging effect of the mobile phone.