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Well, if you want to know about the authenticity of digital photography then you need Adobe Photoshop installed on your PC, also with a display monitor with high resolution.

Differences in rezoluciji.Digitalne photos that application of Pro cameras typically have a resolution of 255 ppi, while using amateur cameras have a resolution of 72 ppi. If the two photographs, which is different in resolution and saved using a combination of 72 ppi (JPG format) and then converted back to 255 PPI for Photoshop, and then a large increase, we will know the different pixels, the contrast. The differences in color and kože.Razlike in color between the face and body does not necessarily mean that it was false. Even if there are differences between the color of the face, hands and other body parts. Due to color each of them have different pores of the skin to affect the reflection of light. So there are differences that we need in this case not only color, but style, tone, point of light and dark spots. When we find a suspicious image, we need to test it using our menu computer monitor, you can use the "Brightness" and "Contrast" menu analysis, set the "Brightness" to its maximum and the 'contrast' to a minimum. Look at this picture, if there is a different view of the face and body. Otherwise, we can examine using Photoshop tools, use a filter HSB, drag the 'H' and 'S' on the right side of the maximum, usually it will work and you can see the different. grain and noise. Generally the majority of digital photos or scan photographs sound, especially in the shadow area. This noise or grain appearing on it, because the camera can not catch a bit of information so that the camera software as a digitally compensated, mainly as interpolation. Each camera model will produce different output. For the analysis of very closely, just look closely at the photo of each channel (RGB or CMY). You will see a very clear distinction between the two images into a combined picture frame. search clip. If the imported image to another, it will have to do a clip. Usually we can find a clip of the face and body, or between the hair and head, etc.

Note: Metadata that are embedded profile from the original digital photography has never been proven that the only, unless you expand the RAW format, such as net. "For the Nikon or Kodak DCR.." Since there are many methods for removing metadata from the original image even from Photoshop software, and we could change the contents of the metadata.

Good luck to try!