Salon Providence Brazilian Wax

Quality Standards: background noise and color distortion

Digital noise and color distortion: The background noise of an image is the change in value during the discovery process by the camera. The background noise and color distortion (or digital noise) occur mainly in areas of uniform color (such as. Skies and shadows) and are caused by temperature and / or the sensitivity / ISO settings. An increase in sensitivity requires a greater amount of light to avoid the generation of background noise. Under conditions of prolonged exposure, the cameras can also create a different kind of noise, called "hot pixels" (dots / pixels of color blocks).

Correction of background noise: The trick to effectively reduce the background noise (either by touch-points, either through special programs and filters, such as Neat Image and Noise Ninja) is to correct the areas concerned without affecting the overall quality and image sharpness. The programs available for free tend to produce low-quality results because they create an effect "watercolor" or blur, and sometimes lack the necessary settings to save the image to the highest quality.

Compression:

The JPEG file format uses a lossy compression: to reduce the size of the files are deleted or lost information. The amount of information lost depends on the set of "quality" of selected programs for image editing and digital cameras when you save JPEG files. At one point, with low quality settings, the elimination of information during the compression process can become visible in the form of compression artifacts (image points that have been lost too many details). Excessive JPEG compression can become visible or as a general loss of detail or as a grainy areas or areas where regular patterns appear (especially in uniform areas, such as may be the sky).

Artifacts: with low quality settings on the camera and / or editing software may introduce compression artifacts in the image. Moreover, the change of the format, sampling or repeated bailouts may degrade the quality of a JPEG, quindi occorre prestare attenzione a non salvare troppo frequentemente questo tipo di file. Se, ad esempio, una foto viene risalvata 4 volte (anche a una qualità di "12" o "Massima"), la qualità dell'immagine peggiorerà sempre di più. Tenendo conto di questo processo, è ovvio che conviene iniziare sempre dall'immagine più pulita possibile. Può essere utile controllare attentamente le impostazioni della fotocamera per accertarsi che i salvataggi vengano effettuati alla massima qualità.

Immagine originale		In the above example is presented a ' acceptable image. Looking at the image full size (100%), no visible noise, discoloration of pixels or "Jaggie" caused by excessive compression JPG.
not accept:
Background noise (distortion and color / pixel) Possible solutions: Adjust your camera on ISO 200 or less. Or, use a slower film (25 to 200 ISO) to minimize background noise and / or film grain.		Compression (* Jaggie) Possible solutions: Save the original image with a higher quality (9-12 is the optimal level). Moreover, the change of the format, sampling or repeated bailouts may degrade the quality of a JPG, so be careful not to save too often this type of file. * i "Jaggie" have jagged edges that appear along the edges of objects.

Tips:
• Save the images to a 100% quality

· Some images have noise levels too high to be corrected with special programs / filters

· Greater and setting levels ISO, the more light needed to avoid background noise

• Some post-editing programs can create noise when you save the image

· The various areas of a photograph of each require a different level of correction to eliminate background noise, etc..

• During the post-editing, save your images as TIFF (or PSD) to avoid compression