Vanishing point is an innovative feature which allows you to select, paint, clone, and transform in perspective. Cloning away an open window in the example image we used on the previous page will not work with the regular Clone Stamp tool because the perspective makes each row of windows smaller until it "vanishes" into a "point" at infinity. So you would have to copy the row below it, paste it into a new layer, rescale it, adjust perspective, adjust the effect of the different lighting, etc. The Filter -> Vanishing Point dialog box makes this much easier. It allows you to draw a mesh that matches the perspective so that the Clone Stamp tool takes into account the perspective differences between the source and the destination rows. Of course there is more to it than geometrical accuracy because lighting and reflections on buildings typically vary with each floor as the angle of light differs. So the Vanishing Point stamp tool inherited some characteristics of the Healing Brush which ensures the natural lighting and reflection gradients are preserved.
Window cloned away in perspective using the Vanishing Point Stamp tool with Healing "OFF"
|Window cloned away in perspective using the Vanishing Point Stamp tool with Healing "ON"|
Perhaps less impressive than Vanishing Point, Edit -> Transform -> Warp is more useful and I am glad I can finally remove it from my personal wish list. In earlier versions of Photoshop, the bounding box of the Edit -> Transform command was rectangular which posed very serious editing limitations. Warp allows for "non-linear" custom distortions and distortions like the ones you can apply to fonts.
This is for instance useful in manual stitching or correction of panoramas. In this example it allowed me to "bend" the highway of the second frame so it fits smoothly with the first frame. In earlier versions of Photoshop, this was only achievable via the Liquify filter. But it was more difficult because the Liquify filter is brush based and therefore more suitable for distorting people shots, and less suitable for creating non-linear distortions on rectangular areas.
High Dynamic Range 32bit Floating Point Images
Although this feature targets the Computer Graphics industry (gaming and animation), it is useful for digital photographers to capture scenes with a high dynamic range. Because I often shoot in tropical conditions (dark shadows, very bright highlights), I developed an early interest in high dynamic range images. Four years ago, in my Nikon Coolpix 5000 review on this site, I illustrated how to capture a large dynamic range by combining exposure bracketed images. HDR is a leap forward in this area. In this example, the intense tropical sunlight carved its way through the dark shadows of this gallery at Angkor Thom, Cambodia. The dynamic range of the scene was several stops larger than the dynamic range of the sensor. Due to the linear nature of a digital camera sensor, it is impossible to capture the shadow detail, without clipping the highlight detail. Alternatively, if you wanted to capture the highlight detail, you will not have enough detail in the shadows.
The new File -> Automate -> Merge to HDR command automatically combines the bracketed images with the following benefits:
- more extended dynamic range
- there are no halos around the edges
- reduced noise in the shadows
- any tonal curves that were applied, e.g. by the RAW converter, are eliminated. You can apply a tonal curve to linear data with a phenomenal dynamic range.
- the data are stored in 32 bit floating point format
These HDR images are linear and look very flat and dull and of course, no monitor or printer can display them. So why do we want HDR? First of all, the linearity is useful in computer graphics applications to create realistic blending of images from different sources based on exposure information of the actual scene (e.g. subjects against backgrounds) and apply realistic lighting and motion blur via software.
By applying a proper tonal curve, photographers can compress the dynamic range and tonal range so the image represents a large dynamic range that looks pleasing to the eye on a monitor or as a pring by allocating the detail where they want it, and without causing posterization by working in a high bit environment. This allows images with spectacular detail in both the shadows and highlights as shown in the above example.
Needless to say that HDR only works well in static scenes. Of course, with a camera like the Nikon D2X, which was used for the above shots, you can shoot in auto-bracketing mode at 7 frames per second, which means it only takes 0.57 seconds to cover all 4 shots. However, this may still be too long for fast moving subjects. There is an option to automatically compensate for any camera or tripod movement that occurred in between shots. Needless to say that this will not work if for instance leaves of trees moved in between shots because of the wind.
This article is written by Vincent Bockaert, author of
The 123 of digital imaging Interactive learning Suite featuring
Adobe Photoshop Elements 2 & 3 and Photoshop 7, CS & CS2
Click here to visit 123di.com
Jun 23, 2005
Jun 23, 2008
Jun 23, 2008
Jun 23, 2008
|Dirt Hose by poppyjk|
|European bee-eaters by drvanger|
from A Big Year - birds
|Fat Is Beautiful Guinea 2008 DP by MarioSS|
from - Fat is Beautiful - (Woman's Portrait n Black and White+ A Border)
The a9 boasts impressive capability. As more examples of it in practice pour in, Sony's claims hold up. Watch the a9 track and maintain focus on a rapidly approaching basketball.
Last week, more than a million tonnes of Californian coastline slid into the ocean, taking part of Highway 1 with it. Check out the remodeling in photos taken before and after the landslide.
Even after eighteen months of reviewing the latest, greatest, shiniest and must-buy-me-est new gear, DPReview staffer Carey Rose has continued to use older DSLR cameras for his freelance work. But now, that might be changing. Read more
Sony is the world's leading mirrorless camera brand but remains third for ILCs overall, it's said in a presentation to investors. A focus on high value cameras and lenses should boost operating income, it says. Read more
It's nicknamed the 'Cycloptic Mustard Monster,' and is a 3D printed medium format camera. Read more
The new NanGuang LED lights are battery powered and come with accessories including filters and diffusers.
Have you been telling yourself, "Hey, I really need one of those 8K displays?" A video about Dell's new 8K monitor shows you what to expect. Is it really that much better?
Tamara Lackey, a Nikon ambassador USA and pro shooter, discusses embracing self-consciousness as a means of connecting with subjects.
There's a new Spiderman movie coming out and the poster been generating a lot of online chatter. Mostly about how it looks like the creation of a fevered teenager that just discovered Photoshop.
An honest defense of the system's merits, with photos as proof.
Copyright disputes are no fun at all. 'Binded' is a new startup that aims to simplify the process of registering - and enforcing - copyright for photographers. Read more
Not everyone wants to pay a premium for a long zoom camera. Thankfully, there are many reasonably priced cameras available, though they won't offer the same image quality as enthusiast models. In this updated roundup we look at big zoom cameras with more consumer-friendly price tags. Read more
Think Tank Photo has updated two of its popular bag lines with improvements to functionality. Read more
We’ve all seen Bob Jackson’s Pulitzer Prize winning photo, but there's another.
The sample footage looks good.
It will automatically pick the best camera settings depending on shooting conditions. It even promises enhanced functionality for your camera, like exposure and focus stacking. It already supports many cameras from Canon, Fuji, Nikon and Sony. Read more
As if $13,950 wasn’t enough to pay for a special edition lens, the Leica Store in San Francisco is offering a prototype of said lens for $24,995. Read more
Make those old photos disappear without deleting them forever.
Firmware updates enable 10 fps shooting with adapted A-mount lenses, and faster startup times and better compatibility for 20 fps shooting when using native lenses on the a9.
Fujifilm has released firmware updates for its camera models X-T2, X-Pro2, GFX 50s, X-T20, X100F and X-T1 and updates to three of its software products.
A 22 year-old Romanian photographer uses his DJI Phantom 4 drone to capture unique perspectives of the city where he now lives.
What's it like to ride the waves with champion surfer Kelly Slater? This VR video from Teton Gravity Research gives you a taste.
When Nikon released the full-frame D3 in 2007, it changed the professional photography industry. In this week's Throwback Thursday, Barney remembers a legend. Read more
The new stuff should have better red hues, improved sensitivity and finer grain - but don't worry - will still shift blues to green, greens to purple and yellows to pink.
Ricoh has introduced a new rugged compact camera with a 16MP CMOS sensor, 28-140mm lens, 2.7" LCD and built-in LED macro lights. Read more
This compact drone can shoot HD video using a 2-axis stabilized 12MP camera. Read more
The new Prynt Pocket can print a photo directly from their iPhone simply by inserting the phone into the printer, then snapping a photo. Each print will cost about 50 cents. Read more
Updates for Adobe Camera Raw and Lightroom CC bring support for the Sony A9 and Panasonic ZS70/TZ90, along with bug fixes.
The Triggertrap remote camera control system is no longer sold due to the company folding, but now users will be able to build their own. Read more
The Magic Format Converter comes with internal optics that expand the image circle of full-frame DSLR lenses for use on the Fuji medium format camera. Read more