ChimpStackr vs PhotoAcute Studio

ChimpStackr is a free, open-source application for focus stacking, with graphical and headless command-line interfaces. It offers Laplacian Pyramid, Weighted Average, Depth Map, and Exposure Fusion methods. Automatic alignment supports translation, Euclidean rotation, similarity rotation and scale, and affine correction. Its 16-bit pipeline preserves bit depth from RAW input to output, and automatic cropping removes black edges caused by alignment shifts. Users can drag image files or folders into the app, compare input and output with a slider, and pause, resume, or cancel long-running stacks. Auto-tuning detects parameters from image resolution. Downloads are listed for Windows as a ZIP, macOS as a DMG, and Linux x86-64 as an AppImage; TIFF and PNG are listed output formats, and RAW files are supported. The project uses the GPL-3.0 license. Exposure Fusion is described for images with varying exposure or lighting, rather than focus stacking. Building from source requires Python 3.9–3.13, and builds can only be made for the current platform.

PhotoAcute Studio processes sets of photos, especially continuous-mode shots, to create high-resolution images with reduced noise. Its superresolution feature combines frames to increase spatial resolution beyond a single source image. Combining photographs can also reduce noise while retaining detail. For exposure-bracketed images, HDR processing can restore shadows and clipped highlights, including when photos are misaligned. Focus stacking combines images taken at different focus distances to increase depth of field. The software also corrects geometric distortion and chromatic aberrations and can remove unwanted moving objects. It supports automatic alignment and batch processing, with RAW, JPEG, TIFF, and OpenEXR output. The maker describes RAW-in-RAW-out processing for fitting results into an existing workflow. Trial mode allows use of all image-processing features, but stamps saved images; the guide says the trial has no time limit. The paid product has no free plan. It runs on Linux, macOS, and Windows; its v2.96 download page lists Windows and Mac OS X, with Linux supported via Wine.