Photoshop bao gồm một lệnh Posterize tự động posterizes một hình ảnh bằng cách lập bản đồ, các kênh Red, Green, và Blue với số mức âm mà bạn đã đặt. Bộ lọc Poster Edges tạo ra một cái nhìn khác nhau, giống như một khắc hơn so với một bản in posterized. Để tạo ra một hình ảnh gợi nhớ đến phong cách Andy Warhol trong những năm 1960 và 70 posterized, | POSTERIZE A PHOTO for a Warhol-style image Photoshop includes a Posterize command that automatically posterizes an image by mapping the Red Green and Blue channels to the number of tonal levels that you set. The Poster Edges filter creates a different look more like an etching than a posterized print. To create a posterized image more reminiscent of the Andy Warhol style of the 1960s and 70s you can instead use three adjustment layers in succession. Use a Black and White adjustment layer to convert the photo to a grayscale image. Then apply a Posterize adjustment layer specifying the levels that correspond to the number of colors you want in the final image. More levels make the image less stylized as it adds many more colors. Finally use a Gradient Map adjustment layer to map any color to each of the levels of gray. You can edit any of the adjustment layers to change the colors or levels until you get the look that you want. For the best result select a photo with a main subject on a plain background or extract the subject and place it on a black background. o Click and drag the Background layer over the New Layer button in the Layers palette to duplicate it. 2 Click the New Adjustment Layer button to add a new blank layer. 3 Click Black White. The Black and White dialog box appears and the image turns to grayscale. 4 Click Auto to see if the contrast improves. Optionally you can click here and select a preset to enhance the contrast. 5 Click OK. 6 Click the New Adjustment Layer button. 7 Click Posterize. The Posterize dialog box appears. 8 Type 4 in the Levels data field. DIFFICULTY LEVEL .J 9 Click OK. o Click the Black and White top layer to select it. Click the New Adjustment Layer button. @ Click Gradient Map. The Gradient Map dialog box appears. Click in the gradient. Attention You get better results if you match the number of gray levels with the number of color stops in the gradient. To add more gray levels double-click the Posterize thumbnail in the .
