How to remove blur from image without photoshop in windows 11?

If you shoot in RAW format, this is a fantastic, professional-grade option. It's completely free and open-source, offering powerful tools to sharpen details and reduce noise without ruining the image.

To remove blur from image files effectively, you will need to work with the Richardson-Lucy deconvolution tool, which is specifically designed to analyze how the image became blurry and then mathematically reverse that process. 

How to remove blur from image:

Step 1: Download and Install RawTherapee

Step 2: Access the Deconvolution Tool

Step 3: Apply Richardson-Lucy Deconvolution

Step 4: Adjust the Deconvolution Parameters

Step 5: Add Noise Reduction

Step 6: Fine-Tune and Export

Toggle the before/after view by clicking the split-screen icon or pressing the "Q" key to compare your original blurry image with the deconvolved version. Make small adjustments to the radius, amount, and iterations until you are satisfied with the sharpness without introducing obvious artifacts. Once happy, click the "Save" button and choose your preferred output format (JPG or PNG) to export your improved image.

A few practical tips from my experience: This method works best on RAW files because they contain more image data to work with. If you are working with a JPG, the results may be more limited. Also, be patient—deconvolution takes more processing power than simple sharpening, so expect the preview to update with a slight delay, especially on larger images. Start with conservative settings and increase gradually, as it is much easier to add more sharpening than to fix an over-sharpened image.