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Lightroom (Lr) and Camera Raw (ACR) are tools developed specifically for post-photographic retouching, with a wealth of powerful digital photo processing capabilities and constantly updated versions to match constantly updated cameras and lenses.

Camera RAW format photos can record more details, but also provide more post-processing space, such photos often have to be processed in Lr / ACR before they can be converted to ordinary jpg photos.

As a photographer, it was very necessary to master how to use it!

If you are shooting RAW format photos, drag ps directly and it will automatically open to ACR. If the PC doesn't turn on, you need to upgrade to a new version. The old ACR doesn't have information about your camera or lens. If it is a normal format photo, ps cc version can select Camera Raw filter in filter, ps cs version needs to click File-Open as, Format Select RAW format.

Basic panels control the overall color of photos, as well as the brightness of photos

Color temperature: slide left photo blue, slide right photo yellow.

Tone: slide left photo green, slide right photo magenta.

Exposure: Controls the brightness of the photo.

Contrast: Controls the contrast between light and dark in a photograph.

Highlight: Controls the brightness of lighter areas of a photo.

Shadow: Controls the brightness of darker areas of a photo.

White: Controls the brightness of the brightest areas in the photo.

Black: Controls the brightness of the darkest areas of the photo.

Clarity: Enhance object boundaries and enhance photo clarity.

Natural Saturation: Controls how bright the darker areas of the photo are.

Saturation: Controls how vibrant the color of the photo is globally.

tone curve

Controlling the color scale of photos can be simply understood as controlling brightness and color.

The curves are distributed along a coordinate axis, the horizontal axis from left to right representing the darkest to brightest areas of the photograph, and the vertical axis from bottom to top representing the darkest to brightest areas.

The initial state of the curve is a 45° oblique line, and the horizontal axis and the vertical axis correspond exactly. The dark areas in the photo are dark in brightness; the bright areas are bright in brightness.

Therefore, pulling up the curve is to brighten the photo; pulling down the curve is to darken the photo.

Detail panel controls noise and sharpness of photos

Quantity: Controls the overall sharpness of the photo, including edge boundary line thickness, brightness contrast, etc.

Radius: Controls the thickness of the boundary between elements in the photo.

(Generally speaking, small quantity + large radius can strengthen the outline, large quantity + small radius can increase the detail)

Detail: It can be understood as the richness of detail in the photo. When the detail is very small, the smooth area will not be sharpened. When the detail is very large, the smooth area will also be sharpened.

Mask: Determines which areas will be sharpened. Alt drag the mask so that only white areas will work.

Brightness: Reduce brightness noise.

Brightness Details: Recover details that were accidentally damaged by noise reduction.

Brightness contrast: Noise reduction also affects the contrast of the photo. This slider controls the contrast of the photo and selects the appropriate corresponding value according to the original contrast of the photo.

Color: Reduce color noise.

Color Detail: Restore details that were accidentally damaged by noise reduction.

Color Smoothness: Noise reduction also affects color transitions. This slider controls whether color transitions are smooth or not. Select the appropriate value according to the photo.

HSL panel slightly adjusts the color three elements (ps hue saturation function can be greatly adjusted, the two are different)

Hue: Changes the hue of the current color.

Saturation: Changes the vividness of the current color.

Brightness: Changes the brightness of the current color.

Separate Tones Add a layer of color to a photo (Adjust is different from Add, to distinguish)

Highlight hue: what color to add to the lighter areas.

Highlight Saturation: Adds the concentration of the color, not when the value is 0.

Shadow hue: what color to add to darker areas.

Shadow Saturation: Adds the concentration of the color, not when the value is 0.

Balance: Determines the brightness at which highlights and shadows are divided. The brightness up is highlights and the brightness down is shadows.

Lens correction corrects lens distortion, including shape, vignetting, and chromatic aberration. You can choose automatic or manual, the purpose is the same, this article only explains automatic

Remove chromatic aberration: eliminate chromatic light changes due to lens reasons, usually green and red edges, purple edges will also appear when the light ratio is large. It can also be removed manually.

Enable profile correction: Correcting lens causes for photo distortion and vignetting requires selecting the correct lens manufacturer and lens model.

Correction: If you are not satisfied with the automatic correction, you can adjust it manually here.

Effects Panel Making special effects, some versions of the software put some functions in other panels

Remove haze: Swipe left to add haziness, right to make the photo clearer. It will change the contrast, sharpness, saturation and other elements of the photo.

Granular: adds granular noise to photos.

Size and roughness: You can also control the size and density of noise.

Post-crop vignetting: adds dark corners to the photo and can also add white highlights.

Quantity: Swipe left to increase dark corners, right to increase bright corners.

Midpoint, roundness, feathering: Controls the size, shape, and transition of dark/bright corners.

Highlights: Useful only when adding vignetting, restoring bright areas darkened by vignetting.

Camera calibration Control of photo shading by primary colors

Shadow: To add a color to the darker areas of a photograph.

Red hue: sliding to the left corresponds to the RGB three primary colors of red gradually shift to magenta, red complementary color cyan gradually green, red and cyan and adjacent colors in the photo will change.

Red Saturation: Swipe to the left, and the saturation of red and its neighbors in the photo will decrease.

The same goes for green and blue.

Simple retouching examples

Original and ACR processed

① After opening the photo, correct the photo distortion first, and directly select the corresponding lens. Then make the following adjustments to the fundamentals. The original image is a little overexposed, reduce exposure. Then lower highlights to brighten shadows and restore detail. Increase the contrast by increasing white and decreasing black, so that the contrast of the photo is normal. Finally, add clarity and natural saturation, so that the photo becomes clear, the color does not gray.

Reduce blue brightness and increase blue saturation to make the sky look bluer. Increase orange and yellow saturation to make sunset look better.

③ Add yellow to highlights and cyan to shadows to enhance the tone of photos.

④ Draw a small S shape to the curve to further increase the contrast of the photo.

Appropriate sharpening and noise reduction to improve the quality of photos.

④ I feel that the ground is a little dark, and then go back to the basic panel to brighten the black, the ground exposure is restored, and there is also a hazy light feeling in the distance.

This article comes from Weixin Official Accounts: Photography Training Society (ID: shoujiPhotography), author: Zhang Xiaozhang

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