Digital cameras as well as other digital instruments have to deal with noise and artefacts. Noise in a picture can be considered as a random variation in the normal pixel distribution. In other cases, noise is not random when caused by a digital process like JPEG compression, leading to so-called JPEG artefacts. A small amount of noise is normal for a photo, due to the limits of the camera's sensor. When the amount of artefacts or noise is too big, it's possible to reduce it with special digital corrections. Keep in mind, that reducing noise will loose some of the photograph's original information, so you have to accept a compromise when using these tools.
This applies a smart smoothing operation that preserve the true edges (high frequencies) of the picture, removing artificial disturbance in the low frequencies.
As you probably know jpeg is a lossy format and saving a picture in this format with a high compression can degrade it noticeably. A common mistake is to reload and save a jpeg file several times: even using low compression each time this process will degrade the quality of the picture.
Jpeg can present small and big artefacts: Small artefacts are visible as halos near the edges of the pictures. They appear when the jpeg has a medium compression. Big artefacts are blocks of pixels of the same color and they appear when jpeg files are heavily compressed.
To reduce both these problems use this Remove Jpeg Noise tool.
When acquiring a picture from a scanner it may appear a problem called Moirè Artifacts. It consists in the presence of slightly visible stripes all over the picture, equally distant one from the other.
The Remove Moirè filter can reduce this problem in your picture. Use the slider to regulate the amount of filter to be applied.
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CodedColor PhotoStudio by 1STEIN is an award-winning Windows photo viewer and editor to organize, edit, resize, reformat, correct, compare, sort, watermark, annotate and print digital images, and to edit EXIF and IPTC data in digital photos. You can rename multiple images, remove scratches, stich panoramas, convert RAW photos (from Canon, Nikon, Olympus, etc. cameras), burn digital watermarks, correct colors, batch convert and correct images and generate a web album in HTML5. The software is easier to use than Photoshop, but more versatile than ACDSee, Picasa, Irfanview or Gimp. Many magazines consider it to be the Swiss Knife of Image Editing. Have a look at our Before / After tutorials to get an idea of the powerful capabilities. The software comes with a detailed handbook and a fast database to store EXIF/IPTC data and color information. CodedColor PhotoStudio is the ideal image editing tool for every-day and professional digital camera users. The user friendly interface combines features like expert photo editing & printing, layer editing, web album galleries, slide shows, photo management & cataloging, custom sorting, IPTC & EXIF editor, GPS tagging, perspective correction, barrel distortion, effects, thumbnail generation, resize & resample images, batch conversion, database keyword searching, red eye removal, color/sharpness/brightness & contrast correction, artifact removal, clone brush, scanner & TWAIN import, screen capture, lossless JPEG rotation, transparency (alpha channel) and layers, gamma correction, screen shows with many transition effects, watermark text, image annotations, panorama stitch & animation, video capture, PDF album export, photo layouts, collages, frames, shadows, histograms, automatic white balance, photo sharing, etc. Opens and converts all common image formats: BMP, WMF, GIF, JPEG, JPEG2000, TIFF, PCX, PNG, PSP, PSD, PCD, HEIC, HEIF, AVIF and all current RAW formats. The installation includes our the CodedColor Publisher, a versatile photo layout and DTP tool to create individual and rich photo books.