Posted on May 12, 2008 | Comments 2
Image processing is very famous for clearing the blur in the pictures. Image processing combines different sections and different and makes the processing of images easy. Even an abrupt picture can be corrected with certain image processing software to get good output.
Image processing combines computer graphic designing, photography and High Dynamic Range (HDR) and these are a set of techniques which support the viewing of different exposures (the range between light and dark).
HDR images are very different and cannot be compared with any other images. Several photos are taken in high-contrast at different exposures. These photos are mixed to get a natural look while deleting the blow out and shadows.
HDR comes under the cropping or editing technology where you use a photo editing software to create different dynamic ranges in one single photo.
The standard meaning of HDR:
The images we click are in 8-bit format, which shows only 0-225 colors that ranges from black to white. These photos do not show different colors, which are in the original frame and sometimes mix up white and black, forming grey shades in pictures.
So, this gave birth to the necessity of 16-bit colored images, which show colors from 0-65,535 where black is perfectly black and white is perfectly shown as white. The range between the 8-bit images and 16-bit images is known as dynamic range. You can recognize the colors and things better in 16-bit images.
HDR is used to extend the dynamic range where the 8-bit images are shown as 16-bit images after applying HDR.
Shoot HDR images:
This method is developed to produce a greater dynamic range where a set of photographs are combined with different range of exposures to match the original 16-bit frame.
The cameras cannot match the dynamic range for the HDR images, so the pattern for yielding HDR images is different.
A minimum of 3 shots are necessary for the HDR, but 7-10 photos of different exposures are necessary to cover the complete brightness and darkness which are in the original frame.
Use a histogram for clicking the photos in different exposures. Prefer shooting images for HDR merging in RAW format only.
Make sure that the images you shoot for HDR differs from each other; at least with one to two differences. If some of the shots you are using in HDR have different blow out, this will ruin the HDR shot. So, make sure that the shots you are using in the HDR do not have many differences.
The digital cameras which are being released now have a different feature that supports HDR image formatting. This is auto-bracketing and allows the user to click a single shot in 2 to 9 different pictures varying with different exposures.
When taking different exposure shots, adjust the shutter speed for every shot and click the images; this will yield different exposures for a single shot.
Do not change apertures as this will give photos of different focal lengths and it will become hard for HDR merging. The same goes for different ISO setting; change in ISO setting will give noise in the shots and merging will be tricky, but not impossible.
Posted in: Digital Imaging