Girl with a Balloon, by Banksy
Destructive vs.
Non-Destructive Editing
NCCTE.2016.II31.01.00 - Apply procedures to use Adobe Photoshop for visual communications.
NCCTE.2016.II31.01.01 - Understand project requirements using photographs.
NCCTE.2016.II31.01.02 - Understand Digital Images.
NCCTE.2016.II31.01.03 - Understand Adobe Photoshop CC interface.
NCCTE.2016.II31.01.04 - Apply procedures to create images using Adobe Photoshop CC.
NCCTE.2016.II31.01.05 - Apply procedures to publish digital images using Adobe Photoshop CC.
Checkpoint
Changing skins
Original Vs. Copy
Do Now:
How does a “checkpoint” in video games work?
How does changing the “skin” of a video game character work? When you change the “skin” of a video game character, does it permanently delete the old version of that character?
Is it important to protect the original image before making changes to it?
(read next slide before you answer)
An elderly parishioner has stunned Spanish cultural officials with an alarming and unauthorised attempt to restore a prized Jesus Christ fresco. Ecce Homo (Behold the Man) by Elias Garcia Martinez has held pride of place in the Sanctuary of Mercy Church near Zaragoza for more than 100 years.
Cecilia Gimenez, who is in her 80s, was reportedly upset at the way the fresco had deteriorated and took it on herself to "restore" the image. She claimed to have had the permission of the priest to carry out the job.
"(The) priest knew it! He did! How could you do something like that without permission? He knew it!"
BBC Europe correspondent Christian Fraser says the delicate brush strokes of Elias Garcia Martinez have been buried under a haphazard splattering of paint.
The once-dignified portrait now resembles a crayon sketch of a very hairy monkey in an ill-fitting tunic, he says.
Art historians are expected to meet at the church soon to discuss how to proceed.
Before
After
Is it important to protect the original image before making changes to it?
History panel
You can use the History panel to jump to any recent state of the image created during the current working session. Each time you apply a change to an image, the new state of that image is added to the panel.
For example, if you select, paint, and rotate part of an image, each of those states is listed separately in the panel. When you select one of the states, the image reverts to how it looked when that change was first applied. You can then work from that state.
You can also use the History panel to delete image states and, in Photoshop, to create a document from a state or snapshot.
To display the History panel, choose Window > History, or click the History panel tab.
A. Sets the source for the history brush B. Thumbnail of a snapshot
C. History state
D. History state slider
History brush tool
The History Brush tool lets you paint a copy of one image state or snapshot into the current image window. This tool makes a copy, or sample, of the image and then paints with it.
For example, you might make a snapshot of a change you made with a painting tool or filter (with the Full Document option selected when you create the snapshot). After undoing the change to the image, you could use the History Brush tool to apply the change selectively to areas of the image. Unless you select a merged snapshot, the History Brush tool paints from a layer in the selected state to the same layer in another state.
The History Brush tool copies from one state or snapshot to another, but only at the same location.
Destructive editing
Destructive editing means you’re changing the original image—once you exceed the History panel’s limit (Changing How Far Back You Can Go) and save your document, those changes are (gulp) permanent.
When you’re working in Photoshop, it’s best to keep your documents as flexible as possible. People (even you!) change their minds hourly about what looks good, what they want, and where they want it—all of which is no big deal if you’re prepared for that. But if you’re not, you’ll spend a ton of time redoing what you’ve already done from scratch.
Non-destructive editing
Nondestructive editing allows you to make changes to an image without overwriting the original image data, which remains available in case you want to revert to it. Because nondestructive editing doesn’t remove data from an image, the image quality doesn’t degrade when you make edits.
Non-Destructive Editing Techniques
Working with adjustment layers
Adjustment layers apply color and tonal adjustments to an image without permanently changing pixel values.
Transforming with Smart Objects
Smart Objects enable nondestructive scaling, rotating, and warping.
Filtering with Smart Filters
Filters applied to Smart Objects become Smart Filters and allow for nondestructive filter effects.
Adjusting variations, shadows, and highlights with Smart Objects
Shadow/Highlight and Variations commands can be applied to a Smart Object as Smart Filters.
Retouching on a separate layer
Clone Stamp, Healing Brush, Spot Healing Brush, Content-Aware Patch, and Content-Aware Move tools let you retouch nondestructively on a separate layer. Be sure to select Sample All Layers from the options bar (select Ignore Adjustment Layers to ensure that adjustment layers won’t affect the separate layer twice). You can discard unsatisfactory retouching, if necessary.
Non-Destructive Editing Techniques
Editing in Camera Raw
Adjustments to batches of raw, JPEG, or TIFF images preserve the original image data. Camera Raw stores adjustment settings on a per-image basis separately from the original image files.
Opening Camera Raw files as Smart Objects
Before you can edit Camera Raw files in Photoshop, you must configure settings for them with Camera Raw. Once you edit a Camera Raw file in Photoshop, you can’t reconfigure Camera Raw settings without losing the changes. Opening Camera Raw files in Photoshop as Smart Objects enables you to reconfigure Camera Raw settings at any time, even after you edit the file.
Cropping nondestructively
After you create a cropping rectangle with the Crop tool, select Hide from the options bar to preserve the cropped area in a layer. Restore the cropped area anytime by choosing Image > Reveal All or by dragging the Crop tool beyond the edge of the image. The Hide option is unavailable for images that contain only a background layer.
Masking
Layer and vector masks are non destructive because you can re‑edit the masks without losing the pixels they hide. Filter masks let you mask out the effects of Smart Filters on Smart Object layers.
History panel
Undo
Using Layers
Allows you to see and jump to a recent state
Steps back one action at a time
⌘/ CNTRL + Z
or
CMD/ CNTRL + Option/ Alt+ Z
Toggles undo for last action
Steps back one action at a time
Non-destructive editing techniques:
Adjustment layers
Smart objects
Using layers
masking
Editing in camera raw
Hide cropped edges
Adjustment layers
A layer that lets you apply color and tonal adjustments to your image without permanently changing pixel values. Use adjustment layers to experiment with color and color tones. You can think of an adjustment layer as a veil through which the underlying layers are seen.
The transform tool
Transforming scales, rotates, skews, stretches, or warps an image. You can apply transformations to a selection, an entire layer, multiple layers, or a layer mask. You can also apply transformations to a path, a vector shape, a vector mask, a selection border, or an alpha channel. Transforming affects image quality when you manipulate the pixels. To apply non-destructive transformations to raster images, use Smart Objects. Transforming a vector shape or path is always non-destructive because you’re only changing the mathematical calculations producing the object
Edit> Free Transform; Edit>Transform or Command/Cntrl + T
scale
rotate
skew
distort
perspective
warp
Flip
Enlarges or reduces an item relative to its reference point, the fixed point around which transformations are performed. You can scale horizontally, vertically, or both horizontally and vertically.
Turns an item around a reference point. By default, this point is at the center of the object; however, you can move it to another location.
Slants an item vertically and horizontally.
Stretches an item in all directions.
Applies one‑point perspective to an item
Manipulates the shape of an item.
Flips the item vertically or horizontally.
Skew
Free transform tool
Smart objects
Preserve an image’s source content with all its original characteristics, enabling you to perform non-destructive editing.
You can:
Transforming with Smart objects
Saved Data
25% image
100% image
100% image
Adobe Camera raw filter
Correct photos easily with Adobe Camera Raw. Use the Camera Raw filter with the Smart Filter feature to enhance saturation, clarity, contrast, and more in your images, without destroying your original file.
Filter> Camera Raw Filter
Camera Raw
A camera raw file contains unprocessed, uncompressed grayscale picture data from a digital camera’s image sensor, along with information about how the image was captured (metadata). Photoshop® Camera Raw software interprets the camera raw file, using information about the camera and the image’s metadata to construct and process a color image.
When you shoot JPEG files with your camera, the camera automatically processes the JPEG file to enhance and compress the image. You generally have little control over how this processing occurs. Shooting camera raw images with your camera gives you greater control than shooting JPEG images, because camera raw does not lock you into processing done by your camera