Advanced Image Comparison
An intuitive, open-source tool for detailed visual image comparison — ideal for designers, photographers, upscaling enthusiasts, and researchers.
What is Improve-ImgSLI?
Creating detailed visual comparisons is often a time-consuming process that requires manual frame alignment in a graphics editor. Improve-ImgSLI was created to transform this task from tedious routine into a fast and intuitive process. It's a powerful open-source tool designed for everyone who values precision in details: designers, photographers, upscaling enthusiasts, and researchers.
The key value of the program lies in its efficiency. It allows you not just to see the difference between two images, but to deeply analyze it with synchronized controls, advanced magnifier with various interpolation methods, and flexible comparison modes. Forget about lengthy preparation — with Improve-ImgSLI you get professional and clear results in just a few clicks.
See It in Action



Powerful Features
不只是滑块,而是分析工具
当然也有经典对比滑块,支持垂直或水平分割以及同步缩放和平移。但在此之上,还提供差异图、PSNR 与 SSIM 指标,以及边缘检测和通道分析。
真正用于细节核查的放大镜
在两张图像上稳定查看同一区域,具备精确定位与亚像素级稳定性。支持双视图、合并视图、位置冻结、内部切分,以及从最近邻到 Lanczos 和 EWA Lanczos 的插值选择。
几乎不用准备就能开始比较
分割视图、Space 加鼠标键的快速原图预览、通道切换和同步导航,让你从载入图像到进入有效比较只需几秒。
把比较过程做成视频
可录制比较会话,在编辑器中打开后修剪或删除时间轴片段,用关键帧驱动比较状态,并导出为 MP4、WebM、AVI、GIF、ProRes、AV1 等格式。
导出你真正搭好的结果
导出的是你在屏幕上组好的完整比较结果,保留分割线、放大镜、标签和样式化叠加层。支持 PNG、JPEG、WEBP、BMP、TIFF 和 JXL。
顺手的文件工作流
支持拖放和剪贴板导入,左右图像列表管理,重排项目,交换当前配对或整列列表,图像评分,以及用鼠标滚轮快速切换。
Smooth Even on Large Files
GPU acceleration keeps things smooth even with multi-megapixel images. The magnifier and export always use the original file quality.
适合你的界面方式
首次启动即可选择 Beginner、Advanced 或 Expert 界面模式,之后还可继续通过主题、界面字体、布局记忆、系统托盘和通知进行细调。
Get Started
Windows
Direct download for the latest installer. Simple and straightforward.
Linux (Flatpak)
Universal Linux package via Flathub for easy installation across distros.
flatpak install io.github.Loganavter.Improve-ImgSLI
Arch Linux (AUR)
Community-maintained package for Arch Linux users.
yay -S improve-imgsli
Python (Source)
Run directly from source with our powerful launcher script.
git clone https://github.com/Loganavter/Improve-ImgSLI.git
cd Improve-ImgSLI
./launcher.sh run