Computer: Huawei MateBook 14.
System: Windows 10.
Software: photoshop 1.0.
1. Find the jpg file to be compressed and compress it with ps software without changing the image size.
2. Open the ps software on the computer, open the jpg image to be compressed, and click the file.
3. Click on the file, and then select the web page saving format.
4. Enter the interface of compressed jpg image, and select Save as jpeg image, and the generated suffix is jpg. Adjust quality. The lower the quality, the smaller the image compression.
5. Click Save, select the path to store the compressed jpg image, and then click Save.
6. It can be seen that the jpg image is successfully compressed from 34kb to 20kb without changing the image size.
How to compress the size of jpg pictures How to compress the size of jpg pictures:
Operating environment: demonstration model: ThinkPadneo 14, system version: Windows 10.
Steps:
1. Right-click the picture on your computer, and then click Open Method-Drawing Options in the pop-up menu.
2. In the drawing tool, you can see that the picture size is 243.9KB. At this time, click the "Resize" option in the menu.
3. Then in the resize and distort window, customize the horizontal and vertical values according to percentage or pixel, such as 50, and then click OK, and the image size is successfully compressed to 28.6KB.
Introduction to JPEG format:
Jpeg (Joint Photographic Experts Group) is the standard of continuous tone still image compression. The file suffix is. Jpg or. Jpeg, which is the most commonly used image file format.
Predictive coding (DPCM), discrete cosine transform (DCT) and entropy coding are mainly used to remove redundant images and color data, which is a lossy compression format. It can compress the image in a very small storage space, which will destroy the image data to a certain extent.
Especially, using too high compression ratio will reduce the quality of the restored image after final decompression. If you pursue high-quality images, you should not use too high compression ratio.
How to compress jpg images and keep the original format unchanged? Now there is an intelligent online image compression tool. You just need to enter the expected KB size after compression. Let's start with his usage:
1. enter "master of second compression" in the browser->; Image compression->; Resize the picture.
2. Enter the KB size you want to compress. The width and height can be changed by default or as required.
3. There are two image compression modes to choose from, intelligent compression &; Specifies the size compression.
4. Drag in or add a picture, wait a moment to complete the compression, and display the compressed picture parameters.
5. It is recommended to use a computer browser.