JPG to HDR converter

.jpg

JPG – is a popular graphic format characterized by a high image compression rate, which leads to a decrease in image quality. It uses the technology of encoding smooth color renditions, providing the ability to frequently reduce the amount of data during the image's recording. Because of the small size, it is requested by the owners of websites, allowing you to save the traffic effectively. It is also frequently used in memory cards of digital video cameras. The JPG algorithm is optimally suitable for compressing photographs and pictures in which realistic scenes with little contrast of colors are present. It is not recommended to use this format for compression of drawings and various kinds of graphics. A strong contrast between several near located pixels provokes the appearance of visible artifacts.

The procedure for compressing the digital images in JPG format is carried out in several stages. First, the photo is transformed into a color space YCbCr, and then it is divided into squares to determine the upper range of the color spectrum. Finally, the colors and brightness are coded. JPEG uses a "lossy" compression system and discrete cosine transform technology. The format acts simultaneously as the standard of ISO and the International Telecommunication Union. The file compression ratio is in the range from 10:1 to 100:1. In this case, the reduction in image quality can vary from insignificant to substantial.

The JPEG Committee

.hdr

This format is used to store bitmap images but otherwise has enhanced performance levels of color and brightness. It blends exposures to capture indistinct tones in the shadows or detail the areas highly illuminated in an image. HDR has the ability to combine numerous images which differ in their distribution of light leading to the creation of quality images.

The pixel value of a HDR file can enclose the entire tonal range that exist in the real world. Images have the ability to show the largest possible range of pixel values. Capturing direct light and utmost shadows present with color portrayed in a manner that is life like. The creation of HDR can be done in two ways, by combining different photographs in a certain way or through the use of image sensors that are unique.

HDRsoft