饥饿游戏

一 |     8月26日消息，NVIDIA正式发布了DLSS 4.5光线重建技术，采用全新第二代Transformer模型，适用于所有RTX GPU，包括RTX 20、30、40、50全系显卡，通过最新NVIDIA App即可启用。     DLSS光线重建是一项神经网络渲染技术，用于提升光线追踪和路径追踪场景的画质。    传统光追渲染中，每条光线只采样场景的一部分信息，直接输出的画面充满噪点，需要降噪器将多帧噪声画面合成成清晰图像，传统降噪器需要人工调校，效果受限于开发者的经验和投入。    
DLSS光线重建工作流程：1080p噪声输入经Transformer模型处理后输出4K光追图像     NVIDIA的方案是用经过超级计算机训练的AI网络替代人工降噪器，生成采样光线之间更高质量的像素。该模型将降噪和超分辨率融合到同一个网络中，通过智能分析时间和空间引擎数据，重建出更清晰、更稳定、保真度更高的高分辨率图像。    据官方介绍，DLSS 4.5光线重建主要带来以下几项重大改进：     1、高效降噪器：新模型的计算能力提升了35%，处理的参数数量增加了20%，同时保持了与上一代模型相似的性能。    2、增强版超分辨率：在DLSS 4.5超分辨率的基础上，该模型在每个场景中都具有更深入的空间感知能力，并更智能地使用游戏引擎像素采样和运动数据。其结果是光照精度提升、时间稳定性改善以及光线追踪和路径追踪内容中的动作更加清晰。

二 |     3、扩展训练数据集：使用更大的数据集进行训练，新模型在图像重建方面表现更出色。    DETROIT -- United Auto Workers union President Shawn Fain is expected to update members Friday afternoon on progress in contract talks with Detroit's three automakers as movement was reported with General Motors.Fain is scheduled to do a live video appearance, where he could call on more workers to walk off their jobs, joining the 34,000 already on strike at six vehicle assembly plants and 38 parts distribution warehouses. The union's strikes at targeted plants at each company began on Sept. 15 and are nearing the start of their sixth week.A person briefed on the talks says the union is exchanging offers with GM and will meet again Friday with the company. The person didn't want to be identified because they’re not authorized to speak on the record about the bargaining. There also were meetings on Thursday with Jeep maker Stellantis.On Thursday, GM posted a video indicating that bargainers are still some distance apart. Gerald Johnson, the company's global head of manufacturing, said GM has offered a total wage and benefit package that averages $150,000 per worker. It includes a 20% pay increase over four years and a company contribution of 8% per year in 401(k) accounts, cost-of-living increases, and it brings most workers to a top wage of $39.24 per hour by September of 2027, the company said.GM already has agreed to pull new electric vehicle battery plants into the national UAW contract, essentially making them unionized, a key point for Fain and the union. The UAW is seeking 36% wages, restoration of defined benefit pensions that workers gave up in the Great Recession, pension increases for retirees, an end to varying tiers of wages for workers and other items.“You might might be asking yourselves why can't General Motors meet every demand Shawn Fain is asking for?” Johnson said on the video. “Simple answer is we need profits to invest in our future.”He goes on to say that during the past decade, GM had net income of $65 billion but invested $77 billion in the business. “If we don't have those profits to continue our investments in our plants, our people and our products, we will be facing declining market share, an inability to fund the EV transition, and an inability to compete with a growing number of competitors right here in America,” Johnson said.Ford and Stellantis have made similar comments, with Ford saying it has reached the limit on how much it can spend to settle the strike. The union, however, says labor expenses are only about 5% of a vehicle's costs, and the companies can divert money from profits and stock buybacks to pay for raises that cover inflation and make up for years of contracts without significant increases. The strikes started with one assembly plant from each company after contracts expired at 11:59 p.m. Sept. 14. The union later added the parts warehouses, then one assembly plant each from Ford and GM.Last week the union made a surprise move, escalating the strikes by adding a huge Ford pickup truck and SUV plant in Louisville, Kentucky. But Fain told workers Friday that the union added the Kentucky plant after Ford presented an economic offer with no more money than a proposal from two weeks ago.About 23% of the union's 146,000 members employed by the three automakers are on strike.Stellantis said Friday that it canceled displays and presentations at the upcoming Specialty Equipment Market Association show and the Los Angeles Auto Show as strike costs continue to grow. Earlier this week the company pulled out of the CES gadget show in January.。这种智能使得模型能够更好地感知并选择最准确的引擎数据，以重建更接近真实场景的图像。    4、开发者精细化调控：全新模型搭配专属开发者遮罩工具，让开发者可进行更细致的参数调节，精准优化算法表现，进一步提升图像质量。

三 |     
第二代Transformer模型带来更大降噪器和更深空间感知     随着DLSS 4.5光线重建正式发布，整套DLSS技术栈均已完成增强与更新，包含多项技术：仅限RTX 50系列的动态多帧生成和6倍多帧生成，支持RTX 40和50系列的帧生成，RTX全系列支持的光线重建、超分辨率和DLAA。         DLSS 4.5光线重建的改进在各款游戏中都有直观体现，《夺宝奇兵：古老之圈》中，新模型提供了更清晰的粒子效果，地下墓穴场景中，火把照亮地面的范围和渐变层次更自然，石头表面的贴图细节在动态光照下更清晰。

四 |     
《夺宝奇兵：古老之圈》对比：右侧DLSS 4.5粒子效果更清晰     《识质存在》科幻走廊场景中，红色激光轨迹的拖影基本消除，每条激光的响应更加即时，走廊天花板的光带反射也更干净，不再有旧版中偶尔出现的噪点。    
《识质存在》对比：右侧DLSS 4.5光照响应速度提升，激光残影减少     《心灵杀手2》中清晰度与稳定性大幅提升，旧版光线重建会将CRT老式电视屏幕的静电纹理过度平滑，新版能还原出更真实的噪点细节。角色面部的环境光遮蔽也更准确，暗部细节不再被过度抹平。    
《心灵杀手2》对比：右侧DLSS 4.5保留CRT电视白噪条纹细节，光照精度提升     要使用DLSS 4.5光线重建，用户需要下载最新的GeForce Game Ready驱动580.88 WHQL或更新版本。安装后在NVIDIA App中前往设置>关于，然后选择加入抢先体验版（该功能将于9月正式上线）。    安装完成后，打开“图形”并选择支持的游戏，或选择窗口顶部的全局设置将光线重建应用于库中每款受支持的游戏。    滚动至驱动程序设置，点击DLSS优设-模型预设，点击自定义，打开光线重建下拉菜单，选择推荐或预设F，最后点击应用即可。

五 |     
NVIDIA App中DLSS Override设置页面：选择Preset F或推荐即可开启DLSS 4.5光线重建          

六 |