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TIFF to HDR

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Information about TIFF
File extension
tiff
File category
Raster image file
Stands for
Tagged Image File format
Developer
Aldus, Adobe systems
Overview
TIFF or TIF is particularly used by graphic artists and photographers to store the raster images. It is very easy to scan and fax under this extension. It offers other features as well like word processing, image manipulation, optical character recognition and DTP (Desktop publishing)- which use page layout software. Earlier it was capable of storing two values of each pixel that is why it was only binary image format but now it can have both grayscale images and colour images. It has become more popular due to its wide acceptance of deep-colour photographs. Besides this, it can also have a vector-based clipping path which comprises of outlines and cropping.
Technical description
The photos have a high quality of graphics as this format supports colour depths from 1 to 24 bits. A single TIFF file can also include header tags which define the geometry of an image like size, definition, image-data arrangement and applied image compression. It offers LZW (Lempel-Ziv-Welch) compression which follows a lossless algorithm to reduce the size of a file. Hence, these files can be edited and saved again without any loss of image quality. It also reserves the information of compression method and by default, the value is one, which means no compression. Furthermore, this format uses 32- bit offsets, which restricts the file size to 4 GiB (Gibibytes). Some variants may also use 64-bit offsets to provide compatibility to large files. It should be noted that every file of this type begins with a two-byte indicator of byte order.
Links
wikipedia.org

Information about HDR
File extension
hdr
File category
Raster Image file
Stands for
High Dynamic Range
Developer
HDRsoft
Overview
These files are also termed as Radiance HDR or HDRI. This format is used to store raster images or digital photos. In this, there is a grid of pixels where every pixel depicts a solo color within the image. Additionally, it has the ability to enrich the color and bring brightness to the pictures. Furthermore, it works well while processing the dark shadows and also on the washed-out areas of a picture. Hence, it is very useful to capture real-world scenes that have high brightness or direct sunlight and as well as extremely shady area or fainted nebulae. These images are the result of numerous different and narrow range exposures of the same matter.
Technical description
HDR images offer the same luminance(an amount of light that is either emitted from or passes through or reflected from a particular area) that of the human visual system. ‘Stops’- Exposure Value differences are used to measure the dynamic range of photography. To double the amount of light, there should be an increase of one exposure value or one stop. Contrary, to decrease the amount of light to half of its value, there should be a decrease of one EV or one stop. Consequently, the darkest parts of shadows require high exposures when something in detail is to be revealed and low exposures are needed when there is a high level of brightness. It uses bracketing which means several shots are taken of the same subject using varied camera settings. Then these images are merged using a photo manipulation program to produce a single image.
Links
wikipedia.org