1. Joint Photographic Expert Group (JPEG) : Since June 1982, Working Group 8 (WG8) of ISO has been working on standard for the compression and decompression of still images. In June 1987, ten different techniques for coding color and gray-scales still images were presented. An adaptive transformation coding technique based on Discrete cosine Transform (DCT) achieved the best subjective results. PEG applies to color and gray-scaled still images. Video sequences can also be handle through a fest coding and decoding of still images, a technique is called Motion JPEG.
2. Photoshop Document (PSD) : PSD stands for “Photoshop document”It’s an application-specific proprietary format, but because of Photoshop’s dominant position in the pixel-editing world, PSD had become something of a quasi-standard. A number of other programs, even some that don’t cone from Adobe, support PSD as an additional file format-but usually as read-only or for import/export purpose, not as their true native file format.
Difference between JPEG and PSD :
| S.No. |
JPEG |
PSD |
| 1. |
JPEG is the actually a standard format that is not tied to any application. Virtually all programs that deal with images are able to open and save in the JPEG format. |
PSD is the native file format for a Photoshop. In PSD, you only have Photoshop that can open the file. |
| 2. |
It is a standard image format. |
It is the document format for Photoshop. |
| 3. |
It can be viewed in a lot of applications. |
It can not viewed in a lot of applications. |
| 4. |
It does not support layers. |
It supports layers. |
| 5. |
It is supported by gadgets. |
It is not supported by gadgets. |
| 6. |
It is less longer than PSD. |
It is lot larger than JPEG. |
| 7. |
A JPEG is just a compressed bitmap. |
while a PSD is PhotoShop file and thus retains all the project information such as the layers and history. |
| 8. |
It is compressed single layer image. |
It is PhotoShop Document. It is an image with the editing layers saved with it. |
| 9. |
It is less popular photo editing software. |
It is very popular photo editing software. |
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Last Updated :
12 May, 2022
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