How to set Huawei mate9 mobile phone photo document correction?

Huawei mate9 mobile phone photo document correction setting steps are as follows:

1. First, turn on the camera, slide the screen to the right to show the following figure, and select Document Correction.

2. As shown below, aim at the content of the document you want to shoot. In document correction mode, the blue box will flash and the text of the document being detected will always appear. This is because the camera will automatically recognize the text area and correct it. Never mind, just press the shutter.

3. The document correction effect is as follows. After shooting, the crop will be automatically adjusted and turned to the front, leaving only the document page. Certificate correction can also take ID cards, bank cards, and a series of things, all without trimming the border.

Extended data:

Classification of image correction of inclined documents

1, the whole tilt correction, that is, assuming that the document image presents the whole tilt phenomenon, then detecting the tilt angle through some technology, and then performing tilt correction through image rotation.

By counting the average pixel heights on the left and right sides of the image and calculating the overall tilt, the overall tilt can be corrected. This method has obvious effect on image processing with more pixels, and it is simple and fast to realize.

But it is not suitable for those single digital images that have been extracted, because the images at this time are generally small, with thin strokes, too little information needed and incorrect statistical results.

2. Local tilt correction. It is considered that the document image presents non-uniform tilt and the local tilt characteristics are different. Local tilt correction based on local tilt characteristics is called local tilt correction. Although local tilt correction makes up for the deficiency of overall tilt correction, it will take more time.

Baidu Encyclopedia-Image Correction of Inclined Documents