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Adobe photoshop cc 2019 user guide free. Photoshop CC 2019 Tutorials – Comprehensive Guide To Adobe Photoshop CC 2019 |
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Photoshop offers a variety of tools, filters, and masks that give you fine control over image sharpness or blur. Sharpening enhances the definition of edges in an image. Whether your images come from a digital camera or a scanner, most images can benefit from sharpening. The degree of sharpening needed varies depending on the quality of the digital camera or scanner. Keep in mind that sharpening cannot correct a severely blurred image. Sharpen your image on a separate layer so that you can resharpen it later to output to a different medium.
Sharpening increases image contrast. If you find that highlights or shadows are clipped after you sharpen, use the layer blending controls if you sharpen a separate layer to prevent sharpening in highlights and shadows. See Specify a tonal range for blending layers. Sharpen your image multiple times in small amounts.
Sharpen the first time to correct blur caused by capturing your image scanning it or taking it with your digital camera. If possible, judge your sharpening by outputting it to the final medium. The amount of sharpening needed varies among output media.
Although Photoshop also has the Sharpen, Sharpen Edges, and Sharpen More filter options, these filters are automatic and do not provide controls and options.
You can sharpen your entire image or just a portion using a selection or mask. Because the Unsharp Mask and Smart Sharpen filters can be applied to only one layer at a time, you might need to merge layers or flatten your file to sharpen all image layers in a multilayered file. The filter sharpens images rather than the opposite. The Smart Sharpen filter has sharpening controls not available with the Unsharp Mask filter.
You can set the sharpening algorithm or control the amount of sharpening that occurs in shadow and highlight areas. Sets the amount of sharpening. A higher value increases the contrast between edge pixels, giving the appearance of greater sharpness. Determines the number of pixels surrounding the edge pixels affected by the sharpening. The greater the radius value, the wider the edge effects and the more obvious the sharpening. Reduce Noise. More Accurate.
The option gets enabled for use when you are using the legacy option which dates from CS6 and processes the file slowly for more accurate removal of blurring. Controls the range of tones in the shadows or highlights that are modified. Move the slider to the left or right to decrease or increase the Tonal Width value. Smaller values restrict the adjustments to only the darker regions for shadow correction and only the lighter regions for highlight correction.
Controls the size of the area around each pixel that is used to determine whether a pixel is in the shadows or highlights. Moving the slider to the left specifies a smaller area, and moving it to the right specifies a larger area. The Unsharp Mask sharpens an image by increasing contrast along the edges in an image. The Unsharp Mask does not detect edges in an image. Instead, it locates pixels that differ in value from surrounding pixels by the threshold you specify.
It then increases the contrast of neighboring pixels by the amount you specify. So, for neighboring pixels the lighter pixels get lighter and the darker pixels get darker. In addition, you specify the radius of the region to which each pixel is compared. The greater the radius, the larger the edge effects. The degree of sharpening applied to an image is often a matter of personal choice.
Keep in mind that oversharpening an image produces a halo effect around the edges. If your final destination is print, experiment to determine what settings work best for your image. Click the image in the preview window and hold down the mouse to see how the image looks without the sharpening. The Radius value varies according to the subject matter, the size of the final reproduction, and the output method.
For high-resolution images, a Radius value between 1 and 2 is recommended. A lower value sharpens only the edge pixels, whereas a higher value sharpens a wider band of pixels. Drag the Threshold slider or enter a value to determine how different the sharpened pixels must be from the surrounding area before they are considered edge pixels and sharpened by the filter.
For example, a threshold of 4 affects all pixels that have tonal values that differ by a value of 4 or more, on a scale of 0 to So, if adjacent pixels have tonal values of and , they are not affected. To avoid introducing noise or posterization in images with flesh tones, for example , use an edge mask or try experimenting with Threshold values between 2 and The default Threshold value 0 sharpens all pixels in the image. You can sharpen parts of your image by using a mask or a selection to prevent sharpening in certain parts of your image.
For example, you can use an edge mask with the Unsharp Mask filter on a portrait to sharpen the eyes, mouth, nose, and outline of the head, but not the texture of the skin. The Maximum, the Median, and the Gaussian Blur filters soften the edge mask so that the sharpening effects blend better in the final image.
Although all three filters are used in this procedure, you can experiment using only one or two. In the Layers panel, select the image layer. Make sure that the selection is still visible on the image. To view your results, select the RGB channel in the Channels panel and deselect the selection in the image. Add blur to an image to give the effect of a narrower depth of field so that some objects in the image stay in focus and others areas are blurred.
You can use a simple selection to determine which areas are blurred, or you can provide a separate alpha channel depth map to describe exactly how you want the blur added. The Lens Blur filter uses the depth map to determine the position of pixels in an image. With a depth map selected, you can also use the crosshair cursor to set the starting point of a given blur.
The way the blur appears depends on the iris shape you choose. The number of blades determines the iris shape. You can change blades of an iris by curving them making them more circular or rotating them. You can also reduce or magnify the preview by clicking the minus button or the plus button. Optional Enable the graphics processor in Photoshop.
Beginning with Photoshop In Photoshop Select None if you do not have a channel with depth map source. Drag the Blur Focal Distance slider to set the depth at which pixels are in focus. For example, if you set focal distance to , pixels at 1 and at are completely blurred, and pixels closer to are blurred less.
If you click in the preview image, the Blur Focal Distance slider changes to reflect the clicked location and brings the depth of the clicked location into focus. For a gradual blurring effect none at the bottom to maximum at the top , create a new alpha channel and apply a gradient so that the channel is white at the top of the image and black at the bottom.
Then select the Lens Blur filter and choose the alpha channel from the Source menu. To change the direction of the gradient, select the Invert check box. Choose an iris from the Shape menu. Drag the Blade Curvature slider to smoothen the edges of the iris, or drag the Rotation slider to rotate it. For Specular Highlights , drag the Threshold slider to select a brightness cutoff; all pixels brighter than the cutoff value are treated as specular highlights.
To increase the brightness of the highlights, drag the Brightness slider. To add noise to the image, use the Amount slider under the Noise section. Choose a noise distribution option - Uniform or Gaussian. To add gray noise without affecting color, select Monochromatic. Blurring removes film grain, noise, and fine texture from the original image. To make the image look realistic and unretouched, you can return some of the removed noise and texture to the image.
Also see: Use the lens blur filter to simulate shallow depth of field. The Blur tool softens hard edges or reduces detail in an image. The more you paint over an area with the tool, the blurrier it becomes. The Sharpen tool increases contrast along edges to increase apparent sharpness. The more you paint over an area with the tool, the more sharpening increases. Buy Adobe Photoshop or start a Free Trial.
Legal Notices Online Privacy Policy. Buy now. User Guide Cancel. Make it. Sharpening recommendations. Tips for better sharpening:. Sharpen using Smart Sharpen. Set the controls in the Sharpen tabs:. Photoshop only Reduce unwanted noise while keeping important edges unaffected.
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