激活微信聊天中發送的照片方法如下：首先，在微信的聊天視窗中打開相冊，挑選一張照片，並勾選原圖後發送。接著，持續按住所發的照片，此時會彈出一些指令，選擇「搜一搜」。當識別完成後，就能挑選出各種表情和特效。

The method to activate photos sent in WeChat chat is as follows: Firstly, open the photo album in the WeChat chat window, select a photo, and check "Original" before sending. Next, press and hold the sent photo, and some commands will appear. Choose "Search," and after identification is complete, you can select various expressions and effects.