1, the picture performance is obviously impossible in fact.

It is easy to judge that some things in the photo can't happen or exist, such as putting one person's head on another person, changing the size or color of things, etc.

2. The original picture has been altered or excessively beautified.

Some photos make people face acne-free, and ugly women become beautiful every second, which is also easy to distinguish.

3, light and shadow or time and season are wrong.

Some photos, obviously in winter, the leaves are all green, originally in the evening, the shooting time is really early in the morning. Many wedding photos will be PS in post-processing, adding a lot of clouds to change the light in the sky.

Characteristics of PNG format network diagram pictures;

1, you can support 256-color color images by using color look-up table or color palette.

2. Streaming reading/writing performance: The image file format allows continuous reading and writing of image data, which is very suitable for generating and displaying images during communication.

3. Successive approximation display: this function can display the image on the terminal while transmitting the image file on the communication link, and gradually display the details of the image after displaying the overall outline of the image, that is, first display the low-resolution image, and then gradually improve its resolution.