Krupno 0.2.6

Krupno 0.2.6 fixes animated GIFs and animations on the command line.

• Animated GIF timing. Repeated frames with very short delays keep their timing, and a GIF that loops forever stays that way when it carries other data, such as XMP.
• Command line. -o result.gif now works for an animated GIF (and .webp for an animated WebP).
• The note that part of a model runs on the CPU no longer shows when only Remove noise runs.

Download: the installer Krupno-0.2.6-setup-x64.exe (recommended) or the portable Krupno-0.2.6-win-x64.zip (without models). Windows 10 or 11, x64. To upgrade, click Update in Krupno 0.2.2 or later, or run the installer: your settings and models stay.

The files are not code-signed yet: if SmartScreen warns, click More info → Run anyway.

Full changelog: v0.2.5...v0.2.6

Krupno 0.2.5

Krupno 0.2.5 upscales animated GIF and WebP, and no longer replaces the results you already have.

• Animations. Animated GIF and WebP are upscaled frame by frame and stay animations, with the same timing. WebP images now also open on Windows without the WebP extension.
• Earlier results are kept. Upscaling an image again no longer replaces its result: the new one gets a number. In Settings → Results you can replace it or skip the image instead, and add the model to the file name to compare models side by side. Command line: --no-overwrite, --name-model.
• Models that run partly on the CPU. If DirectML can't run part of a model (one you added yourself, say) and leaves it to the much slower CPU, Krupno now says so.
• Scoop. scoop bucket add krupno https://github.com/FLABER87/krupno, then scoop install krupno/krupno.
• The version is now shown at the bottom of Settings.

Download: the installer Krupno-0.2.5-setup-x64.exe (recommended) or the portable Krupno-0.2.5-win-x64.zip (without models). Windows 10 or 11, x64. To upgrade, click Update in Krupno 0.2.2 or later, or run the installer: your settings and models stay.

The files are not code-signed yet: if SmartScreen warns, click More info → Run anyway.

Full changelog: v0.2.4...v0.2.5

Krupno 0.2.4

Krupno 0.2.4 can remove noise before upscaling and adds a model for text and documents.

• Remove noise. A new checkbox under Strength cleans camera noise and grain before upscaling, so the upscaler doesn't turn it into invented texture. It is slower and smooths fine detail, so it is off by default. With a scale of 1 it only removes noise. Command line: --denoise.
• Text and documents. A new model (Remacri) that changes small text and digits less than the others. Not for photos; non-commercial license.
• Installer. Both new models are in the full installation; otherwise tick them in the component list.

Download: the installer Krupno-0.2.4-setup-x64.exe (recommended) or the portable Krupno-0.2.4-win-x64.zip (without models). Windows 10 or 11, x64. To upgrade, click Update in Krupno 0.2.2 or later, or run the installer: your settings and models stay.

The files are not code-signed yet: if SmartScreen warns, click More info → Run anyway.

Full changelog: v0.2.3...v0.2.4

Krupno 0.2.3

Krupno 0.2.3 fixes two installer issues.

• Installations for all users now wait for Krupno running in another user's session (Fast User Switching, Remote Desktop) instead of closing it in the middle of a batch.
• The installer's checkboxes are no longer cut off at 300% display scaling.

Download: the installer Krupno-0.2.3-setup-x64.exe (recommended) or the portable Krupno-0.2.3-win-x64.zip (without models). Windows 10 or 11, x64. To upgrade, click Update in Krupno 0.2.2, or run the installer: your settings and models stay.

The files are not code-signed yet: if SmartScreen warns, click More info → Run anyway.

Full changelog: v0.2.2...v0.2.3

Krupno 0.2.2

Krupno 0.2.2 moves the settings into a window of their own and installs new versions for you.

• Settings window. The gear button or Ctrl+, opens the device, tile size, language and other settings. A choice applies at once.
• Update. When a new version is out, Update downloads its installer, checks it against the release's checksums, installs it and restarts Krupno. Nothing is downloaded until you click it.
• Safer installation. The installer asks you to close Krupno instead of closing it in the middle of a batch.

Download: the installer Krupno-0.2.2-setup-x64.exe (recommended) or the portable Krupno-0.2.2-win-x64.zip (without models). Windows 10 or 11, x64. To upgrade, run the installer: your settings and models stay. From this version on, Update does it for you.

The files are not code-signed yet: if SmartScreen warns, click More info → Run anyway.

Full changelog: v0.2.1...v0.2.2

Krupno 0.2.1

Krupno 0.2.1 makes the settings easier to find.

• "Advanced" is now "Settings" and looks like the other sections of the panel, with a short summary of what is set inside.

Download: the installer Krupno-0.2.1-setup-x64.exe (recommended) or the portable Krupno-0.2.1-win-x64.zip (without models). Windows 10 or 11, x64. To upgrade, run the installer: your settings and models stay.

The files are not code-signed yet: if SmartScreen warns, click More info → Run anyway.

Full changelog: v0.2.0...v0.2.1

Krupno 0.2.0

Krupno 0.2.0 brings vendor accelerators, 16 languages and more control over the result.

• Faster on more hardware. On Windows 11 24H2 and later, the GPU and NPU vendors' accelerators (NVIDIA TensorRT-RTX, Intel OpenVINO, AMD, Qualcomm) appear in the device list.
• 16 languages in the window and the installer.
• Better results. Strength tones down invented texture, sizes can be set in pixels, and test-time augmentation squeezes out extra quality.
• Batches in the command-line tool: several files, patterns, subfolders and resuming.
• Convenience. Ctrl+V pastes images, files opened from Explorer join the open window, and every setting is remembered.
• Update check. The window tells you when a new version is out. You can turn it off.

Download: the installer Krupno-0.2.0-setup-x64.exe (recommended) or the portable Krupno-0.2.0-win-x64.zip (without models). Windows 10 or 11, x64. To upgrade, run the installer: your settings and models stay.

The files are not code-signed yet: if SmartScreen warns, click More info → Run anyway.

Full changelog: v0.1.0...v0.2.0

Models v4

Models for Krupno, converted to ONNX from their authors' weights with no other changes (_fp16 files are in half precision). The installer downloads them; for the portable version, put them into its models folder.

Each model keeps the license of its original weights; the MIT license of Krupno does not cover them. The full texts are in MODEL-LICENSES.txt.

File	Author	License
4xBHI_realplksr_dysample_real.onnx	Philip Hofmann	CC BY 4.0
4xBHI_dat2_real.onnx, 4xBHI_dat2_real_fp16.onnx	Philip Hofmann	CC BY 4.0
4x-UltraSharpV2.onnx	Kim2091	CC BY-NC-SA 4.0, non-commercial
4x_foolhardy_Remacri_fp16.onnx	foolhardy	CC BY-NC-SA 4.0, non-commercial
RealESRGAN_x4plus.onnx, RealESRGAN_x4plus_fp16.onnx, realesr-general-x4v3.onnx	Xintao Wang	BSD 3-Clause, © 2021 Xintao Wang
scunet_color_real_psnr_fp16.onnx	Kai Zhang	Apache 2.0, © 2022 Kai Zhang

New since models-v3: scunet_color_real_psnr_fp16.onnx, the "Remove noise" model (weights scunet_color_real_psnr.pth from KAIR v1.0). The other files are unchanged.

Models v3

Models for Krupno, converted to ONNX from their authors' weights with no other changes (_fp16 files are in half precision). The installer downloads them; for the portable version, put them into its models folder.

Each model keeps the license of its original weights; the MIT license of Krupno does not cover them. The full texts are in MODEL-LICENSES.txt.

File	Author	License
4xBHI_realplksr_dysample_real.onnx	Philip Hofmann	CC BY 4.0
4xBHI_dat2_real.onnx, 4xBHI_dat2_real_fp16.onnx	Philip Hofmann	CC BY 4.0
4x-UltraSharpV2.onnx	Kim2091	CC BY-NC-SA 4.0, non-commercial
4x_foolhardy_Remacri_fp16.onnx	foolhardy	CC BY-NC-SA 4.0, non-commercial
RealESRGAN_x4plus.onnx, RealESRGAN_x4plus_fp16.onnx, realesr-general-x4v3.onnx	Xintao Wang	BSD 3-Clause, © 2021 Xintao Wang

New since models-v2: 4x_foolhardy_Remacri_fp16.onnx, the "Text and documents" model. The other files are unchanged.

Krupno 0.1.0

The first release of Krupno, an AI image upscaler for Windows: a desktop app and the krupno-cli command-line tool. It runs on any DirectX 12 GPU and falls back to the CPU.

• Before and after with a slider or side by side, zoom and panning; batches with thumbnails.
• Any scale (×2, ×4, ×8 or fractional) for images of any size, processed in seamless tiles that fit in video memory.
• Seven models to choose from during installation. Each has its own license; see models-v2.
• Keeps transparency, EXIF orientation and color profiles.

Download: the installer Krupno-0.1.0-setup-x64.exe (recommended) or the portable Krupno-0.1.0-win-x64.zip (without models). Windows 10 or 11, x64.

The files are not code-signed yet: if SmartScreen warns, click More info → Run anyway.