I believe that when you take photos, you must have encountered a variety of complicated picture formats.
At the same time, in post-processing, storage images are also faced with various choices.
In this issue, we will give you a comprehensive analysis of commonly used image formats: JPG; RAW; TIFF; PNG; GIF
Dry goods are easy to understand, and quick storage!
1、JPG
Keywords: commonly used
The full name of JPG is JPEG, which is a common format for pictures. The highest level of compression is supported, but this compression is lossy.
Generally speaking, because JPG is compressed, its picture size is small, so it can be efficiently disseminated on major platforms.
The web browsing images we usually contact are basically in JPG format.
▲JPG format is often used for network transmission of pictures, efficient and fast
2、RAW
Keywords: Original
The original meaning of RAW is "unprocessed".
The RAW file records the original information of the digital camera sensor, as well as some original data produced by the camera, such as ISO settings, shutter speed, aperture value, white balance, etc.
RAW is an unprocessed and uncompressed format. RAW can be conceptualized as "raw image coded data" or more vividly called "digital film".
Its function is more similar to that of old-fashioned negatives. It is the format that preserves the original data to the greatest extent.
▲RAW format is often used in the post-production of photos, which preserves the original data to a great extent
JPG and RAW comparison
When we set up the camera to store photos, we usually face the choice of JPG and RAW.
The difference between the two:
● The file size of JPG format is small and the transmission speed is fast . It occupies a small amount of space .
RAW files are large and slow to transfer . More storage space is required . At the same time , it takes longer for the software to open RAW.
● The image quality of JPG is average , and the effect of the photos taken is average. The photo image cannot be restored well when editing the photo. Moreover, the picture loss is strengthened every time it is modified .
The image quality of RAW is very fine , and the photos taken are very good. When revising the photo, it can restore the photo image very well.
● The JPG format has good compatibility , and most computers can recognize this picture.
RAW must use a special reader to open and convert this picture.
All in all, ordinary pictures can be saved directly in JPG. It is recommended to save RAW without loss for the pictures that pay attention to later modification.
3、TIFF
Keywords: high quality
TIFF is a photo format generated by an image generator in a digital camera.
The TIFF format is a lossless compressed file with a low compression rate. It can display millions of colors, so it occupies a large space.
TIFF format can produce very high-quality images, so it is often used for publishing and printing. Images like inkjet and photo are best stored in TIF format.
▲The high quality and lossless TIFF format is often used in the printing industry
TIFF and RAW format comparison
It is also lossless and fine. The main differences between TIFF format and RAW format are as follows:
● TIFF is a lossless compression format. RAW is simply the original format.
● TIFF can be opened by general software, and RAW can only be opened by the software provided by the machine.
● There is more information in RAW than TIFF.
● TIFF cannot be used for exposure adjustment, while RAW can be used for exposure adjustment.
4、PNG
Keywords: Transparency
PNG uses lossless compression, in most cases the image quality can be preserved, but the volume is larger.
If you frequently edit and save a picture and require 100% completeness of the picture data, or need a transparent effect, it is recommended.
For example, it can be used as material for PS or used as an icon, corporate logo, etc.
▲PNG format is often used for material design, icon logo
5、GIF
Keywords: Dynamic
Its biggest feature is dynamic. Many small animations on the Internet are in GIF format.
In fact, GIF saves multiple images as one image file to form an animation.
The most common is the funny gif that is connected by a frame of animation, so in the final analysis, GIF is still a picture file format.
▲GIF format is often used for emoticons and video capture
Class summary
JPG: Small size and compression, suitable for normal transmission
RAW: Large volume requires professional tools to open high-quality digital negatives, suitable for post-commercial editing
TIFF: large volume, high quality, non-destructive, suitable for printing and publishing
PNG: Large size, high quality, transparent, suitable for designing material, icon and logo
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