How does PS set a two-dimensional code to a transparent background?

How does PS set a two-dimensional code to a transparent background? Micro-letter two-dimensional code in the download after the picture is a white background, we design artwork, two-dimensional code with a white background is very inconvenient, how should we remove the white background? Below I use PS to introduce the method of removing the white background of two-dimensional code.

1, first open photosop, a new transparent layer, File > New, New, background color select transparent Color.

2. In this document, open the two-dimensional code we want to change to a transparent background, as shown in the following image. (two-dimensional code for their own generation, no advertising information)

3, then select the layer template on the right, select the channel next to the layer.

4, channel species we will see there are RGB red, green and blue three channels, we choose the red channel here.

5, after selecting the red channel, you have a small circle in the bottom of the channel panel (the channel as a selection load), click, you will find the two-dimensional code in the black part was selected.

6, select the completion of the selection, you are at this time the channel is not selected when the red channel, all again selected RGB (This step is very important, do not forget), finished in the channel panel back to the Layers panel, select the Rubber tool on the right, erase the white on the selection can be. Then Crtl+d cancels out the selection and becomes the following effect. (Mosaic please ignore)

7, cut, after the completion of the save, remember not to save JPG format, you save the PDF PNG PSD can be, because the format of the JPG will be extra to you with a white background.

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