1、打开要更改的图片,点击图层右下方,新建一个图层。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/203fb80e7bec54e79c1ee7e7b7389b504ec26a5d?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
2、将图层设置为减法,如下图所示。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/b219ebc4b74543a9aac4073510178a82b801146f?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、设置前景色,点击前景色,设置颜色。若是要将背景色改为红色,因为采用减法,所以这里要将颜色设置为图示所设置的颜色,可以设为34fff0。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/d53f8794a4c27d1e2dc7cb3d15d5ad6edcc43862?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4、填充前景色,使用快捷键ALT+DEL。可以看到图像背景成为了红色。(反之,红变白,步骤依旧)
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/34fae6cd7b899e5101e8c6ed4ca7d933c9950de0?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
5、切换到原图图层,点击橡皮擦工具,可以设置橡皮擦的大小和硬度。然后使用橡皮擦擦除肖像上的颜色。对边缘可以使用硬度较小的橡皮擦。
擦除完以后就完成了!这种从背景中擦除得到人物的方法,相比直接更换背景的方法能够更好的保留头发和衣服边缘的细节。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/72f082025aafa40f52ff3124a564034f78f01909?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)