For digital images, some continuous areas of the same image have the same color, that is, in these images, many continuous scans have the same color, or many continuous pixels in the same scan line have the same color value.
In this case, only the color value of one pixel, the position of pixels with the same color and the number of pixels with the same color need to be stored. This coding of digital images is called run-length coding, and the sequence of connected pixels with the same gray value (color value) is called run-length.
Take WeChat version 8.0.2 and Huawei P40 mobile phone EMUI 1 1 system as examples, the health code cannot be displayed normally, mainly due to network problems. Please connect your mobile phone to 4G network or WLAN before opening the health code, so that you can travel safely.
If you haven't applied for a health code, please click the "Epidemic Prevention Health Code" button on the payment page of WeChat App, then click the "View Epidemic Prevention Health Code" button, and then get your own health code according to the system prompts.
Wechat usage skills:
1. Turn on the strong reminder function-first open the WeChat App to enter the home page, then click the "Address Book" option, click the friend to enter the other person's personal home page, then click the "…" button in the upper right corner, and then turn on the "strong reminder" function.
2. Bind the real-name authentication information-first open the WeChat App to enter the home page, then click the "I" button in the lower right corner, and then click the "Pay" option.
After entering, click the "…" button in the upper right corner, then click the "real name authentication" option, then click the "change real name" button at the bottom, and finally complete the replacement according to the system prompt.
3. Collect pictures-first open the WeChat App to enter the home page, and then click the "I" button in the lower right corner.
Then click the "Favorite" option to enter the Favorite page, click the "+"button in the upper right corner, click the "Photo" icon button, and then upload the GIF pictures in the mobile phone album to the Favorite page. Please click the "Finish" button in the upper right corner after uploading.