That’s why adding sharpening as the first part of your workflow is a must. On the left is the result using Overlay, and on the right is the sharpening with Soft Light.Digital photos straight out of the camera are always just a little bit soft. Overlay produces a higher contrast effect, resulting in a stronger amount of sharpening, while Soft Light gives you lower contrast and more subtle sharpening. The two most commonly-used blend modes for sharpening images with High Pass are Overlay and Soft Light. Sharpening with the Overlay and Soft Light blend modes Meanwhile, the highlights from the filter are used to increase contrast along the edges by making the light side of the edges lighter and the dark sides darker. And since they've disappeared, they have no effect at all on our image sharpening. How the blend modes affect image sharpnessĪll of Photoshop's contrast blend modes hide areas of neutral gray, which means that the flat gray, non-edge areas from the High Pass filter disappear. Since the goal of image sharpening is to increase contrast only along the edges, we want to keep the width of the highlighting to a minimum, which means that lower Radius values work best.Īnd the easiest way to find the best Radius value for your image is to start by dragging the Radius slider all the way to the left, to a value of 0.1 pixels:Ĭhanging the High Pass filter's blend mode.
#SHARPEN AN IMAGE AND ZOOM IN IN PHOTO FOR MAC HOW TO#
How to find the best Radius value for image sharpening But increasing the Radius value to 10 pixels would extend the highlighting outward to include 10 pixels on either side. In other words, a Radius value of 1 pixel would mean that the High Pass filter is highlighting only a single pixel along either side of an edge. The Radius value affects the width of the edge highlighting by controlling the number of pixels extending outward from the edge that should be included and highlighted as part of the edge. It then looks for edges in the image (areas with an abrupt change in brightness between neighboring pixels) and highlights them by making the light side of the edge lighter and the dark side darker. High Pass works by filling the entire image with flat, neutral gray. I'll use this photo that I downloaded from Adobe Stock: To follow along, you can use any image in need of some sharpening. So now that we know that sharpening an image means increasing contrast along the edges, and that Photoshop's High Pass filter detects those edges, let's learn how to sharpen an image with High Pass!
Once the edges are highlighted, we can then combine the High Pass results with one of Photoshop's contrast-boosting blend modes to easily increase edge contrast without affecting other parts of the image! How to sharpen images in Photoshop with High Pass It looks for edges in the image and highlights them. And High Pass is an edge-detection filter. But what does that have to do with Photoshop's High Pass filter? Well, before we can increase contrast along the edges, we first need to find those edges. So sharpening an image is all about increasing edge contrast. Why is the High Pass filter great for image sharpening? The more we boost edge contrast, the sharper the image appears. Your brain then interprets the increased contrast as "sharper". Increasing contrast along the edges makes the light side of the edge lighter and the dark side darker. Photoshop considers an edge to be any area where there's a big, sudden change in brightness between neighboring pixels. It works by increasing contrast along the edges in your image. Much like a good magic trick, image sharpening is an illusion. To understand why Photoshop's High Pass filter is so good at sharpening images, it helps to understand how image sharpening works in general. I'll be using Photoshop CC but everything you'll learn is fully compatible with Photoshop CS6.ĭownload this tutorial as a print-ready PDF! What does "image sharpening" mean? You'll learn how to find the best settings to use with your image, and I'll show you how to apply the High Pass filter non-destructively so you can sharpen your image without making any permanent changes. In this tutorial, I'll explain what it means to sharpen an image in Photoshop, and why the High Pass filter is such a powerful sharpening tool. But the High Pass filter is also great for sharpening images, and it's much easier to use, with none of the confusing options you'll find with those other two filters. When it's time to sharpen an image, most Photoshop users turn to one of two sharpening filters, either Unsharp Mask or Smart Sharpen.
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