Canon’s In-Camera HDR Patent

Canon’s In-Camera HDR Patent Will Let You Take Pictures Like This

By Casey Chan, Jun 11, 2010 01:59 PM

Canon's In-Camera HDR Patent Will Let You  Take Pictures Like This

I have a app for my iPhone called HDR, it takes 2 pics then blends them together. Makes a real nice picture. Its only a matter of time till the software is in more cameras.

Kevin

Canon’s looking to change the way you take HDR pictures. Previously, in order to capture images like these, you’d have to combine photos in post. With a new patent, the process will be done in-camera, at the pixel level.

High Dynamic Range pictures are taken by capturing the same subject at varying exposure levels and then combining those images in photo editing software. The idea is to create something that’s more detailed and potentially more representative of what your eye can see. You can see what HDR photos look like in one of our Shooting Challenges.

Canon’s new patent wants to turn that sort of complicated process all in-camera. The way it works:

According to an exemplary embodiment of the present invention, preliminary image capturing is performed using the image capturing unit, and the exposure time is assigned to each pixel based on the result of the preliminary image capturing. Image capturing can thus be performed with a wide dynamic range without a loss of highlight detail and a loss of shadow detail.

Canon's In-Camera HDR Patent Will Let You  Take Pictures Like This

Other cameras, like the Sony A550 and A500, are capable of doing in-camera HDR but they’re more of a quick chop method. Mapping out the exposure level by the pixel is far more detailed and if done correctly, has huge implications. HDR has its fair share of fans and haters but Canon’s patent would give Canon cameras the ability to capture a much wider dynamic range in a single image and a stand out feature in the ever evolving camera wars. [PhotographyBay]

Gizmodo, the Gadget Guide.

We’ve seen other cameras provide in-camera HDR modes that capture multiple images and then combine the images to create a higher dynamic range image.  The Sony A550 and A500 do this quite well.

Auto Exposure Bracketing is not working well w...
Image via Wikipedia

Additionally, some cameras have attempted to create an HDR “look” by processing a single exposure in-camera with reduced contrast.  And, while this method can be successful to some extent in post-processing soft using RAW image files, the in-camera processed images tend to look overly “fake” or just plain bad.

Canon is reaching for some lofty goals by altering the exposure data on a pixel level.  If successfully implemented, this is one of those things that could change the way we use cameras forever.

A Nikon D90 in
Image via Wikipedia

Dynamic range is something that we try to squeeze as hard as we can at times.  However, “HDR” as a photographic art form has both lovers and haters.

Would you want to see this expanded dynamic range in your next camera?  How should the final camera work should Canon actually bring such one with this feature to market?

DSLR Cameras for HDR

One of the essential features that a camera must have for HDR photography is exposure compensation. At a minimum, the camera should allow you to manually change the exposure settings with relative ease. This will allow a camera mounted on a tripod to shoot HDR images. Trying to handhold and shoot HDR using exposure compensation is pretty much impossible because you have to fumble through the dials. That’s where Auto Exposure Bracketing (AEB) comes in. AEB is ESSENTIAL for handheld shooting as it allows you to fire off the entire HDR image set by pressing the shutter release for each image. No fumbling needed, just preset the camera, compose the image and press for each release of the shutter.

New York City at night, photographed using the...
Image via Wikipedia

Another great feature to use with AEB is Continuous Shooting mode. With Continuous Shooting activated the camera will shoot all the frames continuously while HOLDING the shutter release down. This allows for steadier handholding and because of the rapid fire, helps reduce ghosting. Don’t get carried away about spending more money on a camera for HDR just for the high frames per second. Not worth it.

Today’s DSLRs have AEB but some don’t cover enough dynamic range. At a minimum the camera in AEB mode should capture a range of at least 4EV (see column 5). That means at least a +2EV and a –2EV image is created in the exposure set. Canon, some of the Nikon’s, Pentax, and the Fuji S3 Pro are able to shoot this sequence by taking 3 images at 2EV spacing. The high-end Nikon’s and Fuji S5 Pro, require 5 images at 1EV spacing but still capture the same dynamic range. A camera with 3 frames @ 1EV spacing isn’t going to allow enough dynamic range in AEB mode. If you have one of these camera’s, all is not lost, just use a tripod and dial in the exposure each time.

Sunset, High Dynamic Range Image
Image via Wikipedia

Some DSLRs allow you to choose the order of bracketing, for example, Meter/Under/Over. What’s the best? The best order of bracketing is Meter/Under/Over. The Under and Over exposed images are essential to HDR and when shot in succession with little time gap, can reduce ghosting. Just omit the Metered exposure and merge-to-HDR the Under and Over images. If they were shot in continuous shooting mode, all the better.

HANDHELD TECHNIQUE

Even if your HDR software can align images, when handheld shooting  good techniques are still needed. When shooting handheld concentrate on being steady. Look through the viewfinder and use one of the etch marks in the viewer and lock it on a feature in the scene. Press the shutter release on hold steady for all the shots.

Before you pay the full price, my Photomatix tutorial has a discount coupon for the program.

Cameras Recording Format AEB Frames & Range AEB Max Spacing Maximum EV range in AEB mode Exposure compen-
sation (dialed-in)
Maximum Frames per second
Canon
EOS-1D Mark IV
JPEG and RAW, RAW+JPEG 3 frames up to 3EV spacing, Can change to 2, 5 or 7 frames
5 frames@2EV: (-4, -2, 0, +2 +4)ev
7 frames@2EV: (-6, -4, -2, 0, +2, +4, +6)ev
Meter/Under/Over
Under/Meter/Over
3 EV spacing1 or 2EV spacing is sufficient for HDR 18 EVNote: The tick marks of the entire EV range are displayed in the rear LCD panel. +/- 3 stops 10 fps
Canon
EOS-1DS Mark III
JPEG and RAW, RAW+JPEG 3 frames up to 3EV spacing, Can change to 2, 5 or 7 frames
5 frames @ 2EV: (-4, -2, 0, +2 +4)ev
7 frames @ 2EV: (-6, -4, -2, 0, +2, +4, +6)ev
Meter/Under/Over
Under/Meter/Over
3 EV spacing1 or 2EV spacing is sufficient for HDR 18 EVNote: The tick marks are indicated up to +/-3EV in the top display only, however all frames are taken, no rear display. +/- 3 stops 5 fps
Canon
EOS-1D Mark III
JPEG and RAW, RAW+JPEG 3 frames up to 3EV spacing, Can change to 2, 5 or 7 frames
5 frames @ 2EV: (-4, -2, 0, +2 +4)ev
7 frames @ 2EV: (-6, -4, -2, 0, +2, +4, +6)ev
Meter/Under/Over
Under/Meter/Over
3 EV spacing1 or 2EV spacing is sufficient for HDR 18 EVNote: The tick marks are indicated up to +/-3EV in the top display only, however all frames are taken, no rear display. +/- 3 stops 10 fps
Canon
EOS-1Ds Mark II
JPEG and RAW, RAW+JPEG 3 frames up to 3EV spacing, Can change to 2, 5 or 7 frames but REQUIRES tether to computer, personal functions
5 frames @ 2EV: (-4, -2, 0, +2 +4)ev
7 frames @ 2EV: (-6, -4, -2, 0, +2, +4, +6)ev
Meter/Under/Over
Under/Meter/Over
3 EV spacing1 or 2EV spacing is sufficient for HDR 18 EVNote: The tick marks are indicated up to +/-3EV in the top display only, however all frames are taken, no rear display. +/- 3 stops 4 fps
CanonEOS-1D Mark II N JPEG and RAW, RAW+JPEG 3 frames up to 3EV spacing, Can change to 2, 5 or 7 frames but REQUIRES tether to computer, personal functions
5 frames @ 2EV: (-4, -2, 0, +2 +4)ev
7 frames @ 2EV: (-6, -4, -2, 0, +2, +4, +6)ev
Meter/Under/Over
Under/Meter/Over
3 EV spacing1 or 2EV spacing is sufficient for HDR 18 EVNote: The tick marks are indicated up to +/-3EV in the top display only, however all frames are taken, no rear display. +/- 3 stops 8.5 fps
CanonEOS 7D JPEG and RAW, RAW+JPEG 3 frames up to 3EV spacing
Meter/Under/Over
Under/Meter/Over
3 EV spacing 6 EV +/-5 stops 8 fps
CanonEOS 5D Mark II JPEG and RAW, RAW+JPEG 3 frames up to 2EV spacing
Meter/Under/Over
Under/Meter/Over
2 EV spacing 4 EV +/-2 stops 3.9 fps
CanonEOS 5D JPEG and RAW, RAW+JPEG 3 frames up to 2EV spacing
Meter/Under/Over
Under/Meter/Over
2 EV spacing 4 EV +/-2 stops 3 fps
CanonEOS 50D JPEG and RAW, RAW+JPEG 3 frames up to 2EV spacing
Meter/Under/Over
Under/Meter/Over
3 EV spacing 4 EV +/-5 stops 6.3 fps
CanonEOS 40D JPEG and RAW, RAW+JPEG 3 frames up to 2EV spacing
Meter/Under/Over
Under/Meter/Over
2 EV spacing 4 EV +/-2 stops 6.5 fps
CanonEOS 30D JPEG and RAW, RAW+JPEG 3 frames up to 2EV spacing
Meter/Under/Over
Under/Meter/Over
2 EV spacing 4 EV +/-2 stops 5 fps
CanonEOS Rebel T2i JPEG and RAW, RAW+JPEG 3 frames up to 2EV spacing
Meter/Under/Over
2 EV spacing 4 EV +/-5 stops – only displays +/-2 stops 3.7 fps
CanonEOS Rebel T1i JPEG and RAW, RAW+JPEG 3 frames up to 2EV spacing
Meter/Under/Over
2 EV spacing 4 EV +/-2 stops 3.4 fps
CanonEOS Rebel XSi JPEG and RAW, RAW+JPEG 3 frames up to 2EV spacing
Meter/Under/Over
2 EV spacing 4 EV +/-2 stops 3.5 fps
CanonEOS Rebel XS JPEG and RAW, RAW+JPEG 3 frames up to 2EV spacing
Meter/Under/Over
2 EV spacing 4 EV +/-2 stops 3 fps
CanonDigital Rebel Xti JPEG and RAW, RAW+JPEG 3 frames up to 2EV spacing
Meter/Under/Over
2 EV spacing 4 EV +/-2 stops 3 fps
CanonDigital Rebel XT JPEG and RAW, RAW+JPEG 3 frames up to 2EV spacing
Meter/Under/Over
2 EV spacing 4 EV +/-2 stops 3 fps
CanonPowerShot G7 JPEG 3 frames up to 2EV spacing
Meter/Under/Over
2 EV spacing 4 EV +/- 2stops 2 fps
CanonPowerShot S3 IS JPEG 3 frames @ 2EV spacing Meter/Under/Over 2 EV spacing 4 EV +/- 2stops 2 fps
CanonPowerShot TX1 JPEG No AEB No AEB No AEB +/-2 stops 2 fps
Nikon
D3, D3s, D3x
JPEG and RAW, RAW+JPEG 3 frames (-1, 0, +1) EV
5 frames (-2, -1, 0 +1, +2)EV
7 frames (-3, -2, -1, 0, +1, +2, +3)EV
9 frames (-4, -3, -2, -1, 0, +1, +2, +3, +4)EV
Can change order from
Meter/Under/Over
Under/Meter/Over
1 EV spacing 8 EV +/-5 stops 4-7 fpsdepends on format chosen, FX, DX, 5:4
Nikon
D700
JPEG and RAW, RAW+JPEG 3 frames (-1, 0, +1) EV
5 frames (-2, -1, 0 +1, +2)EV
7 frames (-3, -2, -1, 0, +1, +2, +3)EV
9 frames (-4, -3, -2, -1, 0, +1, +2, +3, +4)EV
Can change order from
Meter/Under/Over
Under/Meter/Over
1 EV spacing 8 EV +/-5 stops 4-5 fpsdepends on format chosen, FX or DX
Nikon
D300
JPEG and RAW, RAW+JPEG 3 frames (-1, 0, +1) EV
5 frames (-2, -1, 0 +1, +2)EV
7 frames (-3, -2, -1, 0, +1, +2, +3)EV
9 frames (-4, -3, -2, -1, 0, +1, +2, +3, +4)EV
Can change order from
Meter/Under/Over
Under/Meter/Over
1 EV spacing 8 EV +/-5 stops 6 fps8fps w/ battery pack

D300S=7fps

Nikon D2X JPEG and RAW, RAW+JPEG 3 frames (-1, 0, +1) EV
5 frames (-2, -1, 0 +1, +2)EV
7 frames (-3, -2, -1, 0, +1, +2, +3)EV
9 frames (-4, -3, -2, -1, 0, +1, +2, +3, +4)EV
Can change order from
Meter/Under/Over
Under/Meter/Over
1 EV spacing 8 EV +/-5 stops 8 fps
Nikon D2Xs JPEG and RAW, RAW+JPEG 3 frames (-1, 0, +1) EV
5 frames (-2, -1, 0 +1, +2)EV
7 frames (-3, -2, -1, 0, +1, +2, +3)EV
9 frames (-4, -3, -2, -1, 0, +1, +2, +3, +4)EV
Can change order from
Meter/Under/Over
Under/Meter/Over
1 EV spacing 8 EV +/-5 stops 8 fps
Nikon D2Hs JPEG and RAW, RAW+JPEG 3 frames (-1, 0, +1) EV
5 frames (-2, -1, 0 +1, +2)EV
7 frames (-3, -2, -1, 0, +1, +2, +3)EV
9 frames (-4, -3, -2, -1, 0,+1, +2, +3, +4)EV
Can change order from
Meter/Under/Over
Under/Meter/Over
1 EV spacing 8 EV +/-5 stops 8 fps
Nikon D200 JPEG and RAW, RAW+JPEG 3 frames (-1, 0, +1) EV
5 frames (-2, -1, 0 +1, +2)EV
7 frames (-3, -2, -1, 0, +1, +2, +3)EV
9 frames (-4, -3, -2, -1, 0, +1, +2, +3, +4)EV
Meter/Under/Over
Under/Meter/Over
1 EV spacing 8 EV +/-5 stops 5 fps
Nikon
D90
JPEG and RAW, RAW+JPEG 3 frames @ 1.0EV spacing
Nikon, Why would you do this?
3 frames (-1, 0, +1) EV
Can change order from
Meter/Under/Over
Under/Meter/Over
1 EV spacing 3 EV +/-5 stops 4.5 fps
NikonD5000 JPEG and RAW, RAW+JPEG 3 frames @ 2.0EV spacing
Meter/under/over
Under/meter/over
2 EV spacing 4 EV +/-5 stops 4 fps
NikonD3000 JPEG and RAW, RAW+JPEG No AEB No AEB No AEB +/-5 stops 3 fps
Nikon D80 JPEG and RAW, RAW+JPEG 3 frames @ 2.0EV spacing
Meter/under/over
Under/meter/over
2 EV spacing 4 EV +/-5 stops 3 fps
Nikon D70s JPEG and RAW, RAW+JPEG 3 frames @ 2.0EV spacing Meter/Under/Over 2 EV spacing 4 EV +/-5 stops 3 fps
Nikon D50 JPEG and RAW, RAW+JPEG 3 frames @ 2.0EV spacing Meter/Under/Over 2 EV spacing 4 EV +/-5 stops
Nikon D40 JPEG and RAW, RAW+JPEG No AEB No AEB No AEB +/-5 stops 3 fps
Pentax K-7 JPEG and RAW, RAW+JPEG 5 frames @ 2.0EV spacing
Meter/Under/Over
Under/Meter/Over
2 EV spacing 8 EV +/-5 EV stops 5.2 fps
Pentax K-X JPEG and RAW, RAW+JPEG 3 frames @ 3.0EV spacing
Meter/Under/Over
Under/Meter/Over
3 EV spacing 6 EV +/-3 EV stops 4.7 fps
Pentax K10D JPEG and RAW, RAW+JPEG 5 frames @ 2.0EV spacing
Meter/Under/Over
Under/Meter/Over
2 EV spacing 8 EV +/-3 EV stops 3 fps
Pentax K100D JPEG and RAW 3 frames 2.0EV
Meter/Under/Over
Under/Meter/Over
2 EV spacing 4 EV +/-2EV stops 3 fps
Pentax K110D JPEG and RAW 3 frames 2.0EV
Meter/Under/Over
Under/Meter/Over
2 EV spacing 4 EV +/-2EV stops 3 fps
Fuji Fine Pix HS10 JPEG and RAW, RAW+JPEG 3 frames (-1, 0, +1) EV
Meter/Under/Over
Under/Meter/Over
1 EV spacing 3 EV +/-2 stops 7 fps
Fuji Fine Pix S5 Pro JPEG and RAW 3 frames (-1, 0, +1) EV
5 frames (-2, -1, 0 +1, +2)EV
7 frames (-3, -2, -1, 0, +1, +2, +3)EV
9 frames (-4, -3, -2, -1, 0, +1, +2, +3, +4)EV
Meter/Under/Over
Under/Meter/Over
1 EV spacing 8 EV +/-5 stops 3 fps
Fuji FinePix S3 Pro JPEG and RAW 3 frames @ 2EV spacing 2 EV spacing 4 EV +/-3EV stops 2.5 fps
Fuji FinePix S9600 JPEG and RAW 3 frames @ 1EV spacing
Meter/Over/Under
1 EV spacing 2 EV +/-2EV stops 1.5 fps
Fuji Fine Pix S9000/S9500 JPEG and RAW 3 frames @ 1EV spacing
Meter/Over/Under
1 EV spacing 2 EV +/-2EV stops
Fuji FinePix S6000fd/6500fd JPEG and RAW 3 frames @ 1EV spacing
Meter/Over/Under
1 EV spacing 2 EV +/-2EV stops 2.2 fps
Olympus E-3 JPEG and RAW, RAW+JPEG 3 frames @ 1EV spacing
5 frames @ 1EV spacing
1 EV spacing 4 EV +/-5EV stops 5 fps
Olympus E-620 JPEG and RAW, RAW+JPEG 3 frames @ 1EV spacing 1 EV spacing 4 EV +/-5EV stops 4 fps
Olympus E-30 JPEG and RAW, RAW+JPEG 3 frames @ 1EV spacing
5 frames @ 1EV spacing
1 EV spacing 4 EV +/-5EV stops 5 fps
Olympus E-1 JPEG and RAW 3 frames @ 1EV spacing
5 frames @ 1EV spacing
1 EV spacing 4 EV +/-5EV stops 3 fps
Olympus E-330 JPEG and RAW 3 frames @ 1EV spacing 1 EV spacing 2 EV +/-5EV stops 3 fps
Olympus E-500 JPEG and RAW 3 frames @ 1EV spacing 1 EV spacing 2 EV +/-5EV stops 2.5 fps
Olympus E-410 JPEG and RAW, RAW+JPEG 3 frames @ 1EV spacing 1 EV spacing 2 EV +/-5EV stops 3 fps
Olympus E-510 JPEG and RAW, RAW+JPEG 3 frames @ 1EV spacing 1 EV spacing 2 EV +/-5EV stops 3 fps
Sony A900 JPEG and RAW, RAW+JPEG 3 frames @ .7 EV spacing
5 frames @ .7 EV spacing
.7 EV spacing 2.8 EV ? 5 fps
Sony A850 JPEG and RAW, RAW+JPEG 3 frames @ .7 EV spacing
5 frames @ .7 EV spacing
.7 EV spacing 2.8 EV ? 5 fps
Sony A100H JPEG and RAW, RAW+JPEG 3 frames @ .7EVspacing .7 EV spacing 1.4 EV +/-2EV stops 3 fps

Ferrell McCollough

http://beforethecoffee.com/dslr-cameras-for-hdr/

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