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影像超大杯——

小米14 Ultra。

它带着徕卡全明星四摄，站上了今年的机圈大舞台。

但这还只是开胃前菜。

后面还有

vivo X100 Ultra和华为P70系列等影像旗舰，蓄势待发。

有的走强计算摄影路线，有的主打光影氛围。

哪怕是朴实无华的真实还原路线，都有挺多机友喜欢。

从爆料来看啊。

 

今年这一批影像超大杯手机，都会基于大模型做超分算法，来补强高倍率拍照下的解析力。

长焦超分算法，是好是坏？

放在几年前，手机长焦上的花活儿还很少。

影像旗舰的长焦，确实有了更多创新。

比如今年华米OV，都做了长焦微距，拍近距离物体贼好使。

而算力更猛的ISP，搭配各家自研的算法，也实现了无损变焦和多摄融合，让手机在长焦端段的解析力，得到明显加强。

它之所以能成为机圈五五开，拍照从年头打到年尾。

除了原生焦段覆盖全面，和它成熟的超分算法，也有很大关系。

它的原生长焦焦段，明明只有90mm（3.5倍），看着就很短。

焦段覆盖之全，画质可用度之高。

搭载着5倍

IMX 586

的小米

12S Ultra，都

不禁汗流浃背。

在光线充足的情况下。

甚至和三星

的

小底

10倍长焦，都有一战之力。

受限于机身内部空间，手机的长焦镜头，注定不能无脑堆堆乐。

而长焦天生又有着望远，以及压缩空间构图的需求。

和超分算法打配合，无疑是当下，乃至未来手机计算摄影的主流方向。

所以咱们能看到，时间来到2024年。

各家厂商都给长焦上了一套全新的超分算法。

作为对比，iPhone 15 Pro Max的画面已经明显发糊了。

但机哥实测，这机子拉到13.3倍以上，会触发超分算法。

照片观感，比粗暴的数码裁切好了不少。

所以超分算法什么的，是不可能整上的。

好处是照片看着会自然很多。

以至于部分发烧友经常吐槽，小米的长焦镜头毫无算法可言...

这年头，没有超分算法加持的长焦，根本满足不了数毛党挑剔的眼光。

在手机影像横评对比时，更是会被打得还不了手。

左：10X开启超分算法丨右：10X关闭超分算法

 如此看来。

小米14 Ultra选择给长焦端用上超分算法，就不是啥奇怪的事儿了。

像这张图，机哥用的是3.5X光学镜头拍摄的。

远处的摩天轮其实已经很难看清。

但换成14U，放大到30倍，并大模型长焦算法后。

不过也

有很多资深摄影佬，站出来反对这么干——

“AI算出来的细节，它都不真实了，还算摄影吗？”

看来手机厂商上不上超分算法，都会有人不满意。

但机哥倒是能理解，这些反对长焦超分算法的声音。

超分算法的优缺点都挺明显的。

在长焦倍数太大的时候，超分算法能给原本画质下降严重的图片，补上清晰的纹理线条和降噪。

左：10X开启超分算法丨右：10X关闭超分算法

但算法的成熟程度多高、介入程度多深。

直到现在，都是厂商们需要去衡量的难题。

如果超分算法介入过少，观感可能还不如原生画面。

那强行算出来的细节，甚至会让人起鸡皮疙瘩。

酷安有位大佬之前特意做了个测试，他先给人脸打上高斯模糊。

但因为手机长焦的超分算法过于激进。

导致它调用了大模型，强行在高斯模糊图层上，补偿出一张本不存在的人脸。

另外咧。

在高倍率变焦下，本该横平竖直的字体，经过超分算法的处理后，变得扭扭捏捏、难以分辨。

我们还能隐约看到“逆时针”三个字，底下的黑色字体还挺容易辨认。

除了高倍率下的文字处理。

最简单的例子，就是在街上随处可见的树叶。

树叶的特点是啥呢？

茂盛、密集、纹理

多。

以手机的ISP

算力和模型精度，很难把

树叶算得层次分明。

像这张图，手机在高倍率变焦下拍摄的树叶被超分算法处理后，就直接糊在一块。

计算摄影，也是内部空间捉襟见肘的手机，应该去发展的方向。

但过度的计算，还真不是广大用户喜闻乐见的操作。

比如阿米就加个超分算法的开关，能像HDR开关那样灵活调整。

甚至以后算力上来了，还可以加个滑条，让用户自己选择超分算法的介入程度。

既然介入太猛，会有油画感。

介入太少，解析力又不够看。

当然AI大模型对于手机拍照的加持，不仅限于长焦超分，像小米就做了个AISP计算摄影平台。

把光学、影调、色彩和人像大模型做好了，手机拍照能自动识别场景，并调用这些大模型对照片进行调整。

随着AI大模型的发展，以后手机会用到大模型的功能，只会有多无少。

图片来自网络

可以算，但不能瞎算

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