𝐒𝐞𝐚𝐀𝐫𝐭で𝐢𝐦𝐠𝟐𝐢𝐦𝐠(画像から画像)の使い方について解説

AIジェネ【AIイラスト生成の情報発信】
26 Jul 202310:22

TLDRThe video provides a comprehensive guide on using the img2img feature to generate images with similar poses and features to a reference image. It explains that img2img is particularly useful for refining poses, changing colors, and correcting specific parts of an image, thereby saving time compared to generating images multiple times with txt2img. The presenter shares tips on setting denoising strength for optimal results, which typically ranges from 0.5 to 0.7. The video also demonstrates how to change the color of specific parts like eyes and hair using prompts, and cautions against using the brush icon for such tasks as it can degrade image quality. It concludes with a demonstration of creating a lip-syncing animation by modifying the mouth area and emphasizes the importance of using prompts for natural and high-quality results. The video is an excellent resource for mastering img2img for efficient and creative image generation.

Takeaways

  • 🎨 Use img2img to generate an image with a similar pose to a reference image, which can save time compared to repeatedly generating with txt2img.
  • 🖼️ img2img is not only for poses but also for changing colors and correcting specific parts of an image.
  • 🔘 Select and upload the reference pose image and enter prompts in the img2img interface, then press send.
  • ⚙️ Adjust denoising strength between 0.5 to 0.7 for a good finish, avoiding a too strong or too weak effect.
  • 📈 Including quality-enhancing prompts like 'masterpiece, best quality' can improve the result, while avoiding 'worst quality, low quality'.
  • 👁️‍🗨️ When changing specific features like eye color, it's better to specify it in the prompt rather than using the brush icon to maintain quality.
  • 👩‍🎤 For lip-syncing animations, use the brush icon to mask only the mouth part for a more natural look.
  • 🔵 To change hair color while keeping the original image's characteristics, adjust denoising strength to find a balance between change and originality.
  • 🚫 Avoid using the brush icon for broad changes as it can lead to a decrease in image quality and unnatural results.
  • 📝 For specific part modifications, it's recommended to use display prompts for a more natural and higher quality outcome.
  • 🌟 Mastering img2img can lead to efficient creation of desired poses, color changes, and specific part modifications without compromising on quality.

Q & A

  • What is the primary purpose of using img2img?

    -The primary purpose of using img2img is to generate an image with a similar pose and features as a reference image, which can save time when trying to achieve a specific pose or feature in the generated image.

  • How does img2img differ from txt2img?

    -While txt2img is used to generate images from textual descriptions, img2img is a method of generating an image from an existing image, focusing on maintaining poses, features, and even the background and clothes of the reference image.

  • What is the recommended denoising strength range for generating images with img2img?

    -The recommended denoising strength range for generating images with img2img is between 0.5 to 0.7, which tends to produce good image generation results.

  • How can one change the color of specific parts of an image using img2img?

    -To change the color of specific parts of an image using img2img, it is recommended to specify the desired color directly in the prompt rather than using the brush icon, as this can lead to better quality and a more natural finish.

  • What is the issue with using the brush icon to change specific parts of an image?

    -Using the brush icon to change specific parts of an image can lead to a decrease in quality, as the boundary part of the outline outside the painted area can appear unnatural and the overall image may crumble.

  • How can one generate an image with a similar pose from a reference image?

    -To generate an image with a similar pose from a reference image, one should press the ai illustration generation button, select img2img, upload the reference image, and then enter the model prompt and negative prompt before pressing the send button.

  • What is the difference between open pose in SeaArt and img2img?

    -Open pose in SeaArt has a function to extract only the pose, whereas img2img generates not only the pose but also the background and clothes, providing a more comprehensive image generation.

  • How can one improve the quality of an image generated with img2img?

    -To improve the quality of an image generated with img2img, one can include a quality-enhancing spell such as 'masterpiece, best quality' in the prompt and avoid using the brush icon for specific part changes.

  • What is the effect of denoising strength on the generated image?

    -Denoising strength affects how closely the generated image resembles the original. A lower value will make the image look more like the original, while a higher value will create a more distinct image.

  • How can one create a lip-syncing animation video using img2img?

    -To create a lip-syncing animation video using img2img, one can use the brush icon to mask only the mouth part or specify the desired mouth action directly in the prompt to maintain naturalness and quality.

  • What is the recommended approach for changing the eye color in an image using img2img?

    -The recommended approach for changing the eye color is to specify the new eye color directly in the prompt (e.g., 'yellow eyes') and adjust the denoising strength to maintain the original image's quality.

Outlines

00:00

🎨 Introduction to img2img: Generating Images with Desired Poses and Features

This paragraph introduces the concept of img2img, a tool used to generate images with poses and features similar to a reference image. It discusses the challenges of generating ideal poses with txt2img and how img2img can help overcome these by using a reference image to produce a similar pose. It also highlights the utility of img2img for changing colors and correcting specific parts of an image, thus saving time. The paragraph further explains the process of using img2img, including selecting a reference image, entering prompts, and adjusting denoising strength for optimal results. It concludes with a comparison of img2img to open pose in seaart, noting that img2img generates not just the pose but also the background and clothing.

05:02

🖌️ Modifying Image Colors and Specific Parts with img2img

The second paragraph delves into techniques for changing specific colors in an image using img2img. It warns against using the brush icon for color changes, as it can lead to quality deterioration and unnatural results. Instead, it suggests specifying color changes directly in the prompt for better quality. The paragraph provides examples of changing eye color and hair color using different denoising strength values and explains the impact of these values on the final image. It also touches on changing specific parts of the image, such as the mouth for lip-syncing animation, and recommends using the brush icon carefully to maintain naturalness and quality.

10:02

📢 Conclusion and Call to Action

The final paragraph serves as a summary and a call to action. It emphasizes the benefits of mastering img2img for quickly creating images with desired poses and features, as well as for changing colors and modifying specific parts without compromising quality. It advises against excessive use of the brush icon for modifications and suggests specifying changes in the prompt instead. The paragraph concludes by encouraging viewers to subscribe to the channel for more content.

Mindmap

Keywords

💡img2img

img2img is a method used in image generation where an output image is created based on a reference image. It is particularly useful for maintaining a similar pose or features as the reference. In the video, it is explained that img2img can be used to generate images with a desired pose, change colors like hair or clothing, and correct specific parts of an image without having to start from scratch each time, thus saving time and effort.

💡pose

A pose refers to the particular way in which a person or object is positioned or arranged in an image. In the context of the video, the importance of pose is highlighted when using img2img to generate images that have the same or similar poses as a reference image. It is a fundamental aspect of creating images that look natural and aligned with the desired outcome.

💡denoising strength

Denoising strength is a parameter used in image generation that controls the level of detail preserved from the original image. A lower value results in an image closer to the original, while a higher value allows for more deviation, potentially leading to a completely different image. The video suggests a recommended range of 0.5 to 0.7 for a good finish when using img2img.

💡model prompt

A model prompt is a set of instructions or a description given to an AI model to guide the generation of an image. It includes the desired features, characteristics, or elements that the user wants to be included in the generated image. In the video, the model prompt is mentioned as a part of the process of using img2img, where the user inputs specific details to achieve the desired outcome.

💡negative prompt

A negative prompt is used to specify what should be avoided or not included in the generated image. It helps the AI model to understand what aspects of the image are not desired, leading to a more refined and targeted output. The video script mentions using negative prompts to prevent low-quality image generation.

💡color change

Color change refers to the process of altering the color of specific elements within an image, such as hair or eyes. The video demonstrates how to change the color of these elements using img2img, either by specifying the color in the model prompt or by using the brush icon to target specific parts of the image.

💡brush icon

The brush icon is a tool within the image generation interface that allows users to manually edit or draw on specific parts of an image. The video discusses the use of the brush icon to change the color of certain features, such as eyes, but also cautions that it can lead to a decrease in image quality if not used carefully.

💡lip-syncing animation

Lip-syncing animation is a technique where the mouth of a character in an animation or video is manipulated to match the rhythm of speech or song. In the context of the video, the author discusses the potential of using img2img to create images that can be used in lip-syncing animations by modifying the mouth area.

💡open pose

Open pose is a feature in some image generation tools that allows for the extraction and use of just the pose from an image, disregarding other elements. The video contrasts open pose with img2img, noting that while open pose focuses solely on the pose, img2img also includes the background and clothing in the image generation process.

💡quality-enhancing spell

A quality-enhancing spell, in the context of the video, refers to a phrase or instruction added to the model prompt to improve the quality of the generated image. Examples given include 'masterpiece' and 'best quality', which are intended to guide the AI towards producing higher quality results.

💡specific parts

Specific parts refer to particular areas or elements of an image that the user may want to modify or emphasize. The video discusses how to change or correct these parts using img2img, either by including instructions in the model prompt or by using the brush icon for more precise edits.

Highlights

Aicchi explains the use of img2img, a method for generating images with the same pose and features as a reference image.

Img2img is useful for refining poses, changing colors, and correcting specific parts of an image.

The video demonstrates how to use img2img to finish an image beautifully.

Img2img can generate images with similar poses and features to a reference image without the need for multiple iterations.

To use img2img, select the pose image for reference and enter model and negative prompts before sending.

Denoising strength should be set between 0.5 to 0.7 for a good finish.

Img2img generates not only the pose but also the background and clothing, unlike the open pose in seaart.

Changing the color of specific parts, such as eyes, can be done more effectively using prompts rather than the brush icon.

Brush icon usage can lead to quality deterioration and is not recommended for specific part corrections.

For a more natural and higher quality result, it's better to specify color changes in the prompt rather than using the brush icon.

Denoising strength can be adjusted to maintain the original image's characteristics while changing colors.

A denoising strength setting between 0.5 and 0.7 is recommended for color changes to maintain image quality.

When creating lip-syncing animations, it's better to mask only the mouth part using the brush icon for a natural finish.

Using the brush icon for specific part changes can lead to unnatural outlines and quality issues.

The video provides a summary of img2img's capabilities, emphasizing the importance of prompt specifications for quality maintenance.

The video encourages viewers to subscribe to the channel for more informative content.

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