必修！stable diffusionのアップスケール①　Multi Diffusionの使い方　#ai画像生成 #stablediffusion #ai技術

The assistant Alice introduces the importance of resolution when generating images using Stable Diffusion. She explains that today's focus is on the practical application of image upscaling using two essential extensions: Multi Difussion Upscale and ST Web UI. The former is crucial for enhancing resolution, while the latter assists in understanding aspect ratios. Alice also discusses the installation process of these extensions and sets the stage for a live demonstration of image generation using Engineering v4.5, aiming to create high-quality images with a focus on character design and composition.

Alice delves into the nuances of image upscaling by discussing the impact of negative prompts on image quality. She recommends using simple negative embedding, such as Easy Negative V2, to avoid degradation of images. The assistant also explains the process of fixing seed values for consistent results and explores different upscaling methods, including RS Ligan for anime-style images and Ultra Sharp for 2.5D images. Alice experiments with denoising strength to find the optimal balance between image detail and noise, ultimately aiming to enhance the quality of upscaled images.

Alice demonstrates the process of upscaling images to 4K resolution and beyond. She discusses the use of the 'Child Difussion' feature in the extension for handling high-resolution images. Despite the significant VRAM consumption, Alice successfully generates a 4K image using her RTX 4090 GPU. She also touches on the use of the 'Multi Difussion Upscale 4 Auto Mattic Even' extension for managing VRAM usage during the upscaling process. The assistant shares her insights on the importance of denoising strength when scaling images and the impact it has on the final output.

Alice attempts to upscale an image to 8K resolution, facing challenges due to the high VRAM requirements. She discusses the use of 'Child Difussion' with the 'Enabled Tile Difussion' option to manage VRAM consumption effectively. Alice experiments with different denoising strengths to find the best balance for 8K upscaling, ultimately achieving a high-quality image with minimal noise and preserved details. The assistant emphasizes the importance of adjusting denoising strength based on the desired resolution and the type of image being processed.

Alice concludes the session by comparing the different resolutions of the images generated, highlighting the significant improvement in quality when upscaling from 2K to 4K and even to 8K. She reflects on the various techniques and settings used throughout the process, acknowledging the potential for further exploration and refinement. Alice invites viewers to subscribe to the channel for more content on image generation and upscaling, and she expresses her hope to cover more advanced features in future videos.