Canon Patent For “Subject Blur Correction” (computational photography)

Cano Patent

Here is anew Canon patent application. Not for an RF mount lens for once but for computational photography.

Canon patent application 2021-96460 (Japan) discusses methods and algorithms to reduce the blur of a photographed subject. The technology automatically detects the subject and corrects blur. From the patent literature (machine translated):

To provide an image blur correction device capable of obtaining an image blur correction effect desired by a user. Since the amount of shake (direction and magnitude of shake) is generally different between “camera shake” and “subject shake”, it is not possible to completely correct both. Therefore, for example, [the patent] discloses a technique for correcting “subject shake” when a subject’s face is detected and correcting “camera shake” when a subject’s face is not detected.

The algorithm can differentiate between a moving subject and a not firmly hold camera, and correct the blur depending by the situation. The amount of correction can be set by the user. More form the Canon patent application:

It is considered that which of “camera shake” and “subject shake” should be corrected depends on the intention of the user (target of interest) in the shooting scene. For example, when the user pays attention to the background, it is desirable that the “camera shake”, which is the shake of the entire screen, is corrected. On the other hand, when the user is paying attention to the main subject, it is desirable that the “subject shake” is corrected. Therefore, it is necessary to appropriately control the shake correction target according to the user’s intention that changes with the shooting scene.

Interesting patent application. Expect this technology on your future Canon camera.

More Canon patents are listed here. Some particularly interesting patent applications we think might get into production are these:

[via asobinet.com]

Canon Patent: RF 24mm f/1.2, RF 28mm f/1.2 and RF 35mm f/1.2 Lenses

Canon Patent

And yet another Canon patent for RF mount lenses, spotted by asobinet.com.

Canon patent application P2021-92694A (Japan) discusses optical formulas for RF 24mm f/1.2, RF 28mm f/1.2 and RF 35mm f/1.2 lenses for the Canon EOS R full frame mirrorless camera system. We think these patents might well go into production.

canon patent

More Canon patents are listed here. Some particularly interesting patent applications we think might get into production are these:

Canon Patent: 83mm f/1.4 For The Canon RF Mount

Canon Patent

And here is another Canon patent for an RF mount lens.

Spotted by Hi Lows Note, Canon patent application 2021-81531A (Japan) discusses optical formulas for a 83mm f/1.4 lens for full frame mirrorless cameras, i.e. for the EOS R camera system.

Embodiment 1

  • Focal length (mm): 82.87
  • F number: 1.45
  • Half angle of view (degree): 14.63
  • Image height (mm): 21.64
  • Lens length (mm): 126.50
  • Back focus (mm): 13.00

Embodiment 2

  • Focal length (mm): 82.86
  • F number: 1.45
  • Half angle of view (degree): 14.63
  • Image height (mm): 21.64
  • Lens length (mm): 128.50
  • Back focus (mm): 17.13

Embodiment 3

  • Focal length (mm): 82.64
  • F number: 1.45
  • Half angle of view (degree): 14.67
  • Image height (mm): 21.64
  • Lens length (mm): 113.70
  • Back focus (mm): 18.16

More Canon patents are listed here. Some particularly interesting patent applications we think might get into production are these:

Canon Patent: 19mm f/2.8 Lens For Full Frame Mirrorless Camera Systems

Canon Patent

Here is another Canon patent for an RF mount lens. And again it is for a lens for the RF mount.

Canon patent application P2021-67826A (Japan) discusses optical formulas for a 19mm f/2.8 lens or a full frame mirrorless camera, the EOS R. The patent was spotted by Hi Lows Note.

Embodiment 1

  • Focal length: 19.50 mm
  • F number: 2.88
  • Half angle of view (degree): 47.99
  • Image Height: 21.65 mm
  • Lens length: 96.33 mm
  • Back focus: 18.34 mm

Embodiment 5

  • Focal length: 19.29 mm
  • F number: 2.86
  • Half angle of view (degree): 48.30
  • Image Height: 21.65 mm
  • Lens length: 96.59 mm
  • Back focus: 18.43 mm

Canon Patent: 20mm f/1.8 And 23mm f/1.8 Lenses For The RF Mount

Canon Patent

And here is yet another Canon patent discussing optical formulas for lenses for the EOS R full frame mirrorless system.

Canon patent application P2021-71624A (Japan) discusses optical designs for a 20mm f/1.8 lens and a 23mm f/1.8 lens for full frame mirrorless systems. That’s the RF mount. The patent was spotted by Hi Lows Note.

Embodiment 1: RF 23mm f/1.8

  • Focal length 23.40 mm
  • F number 1.85
  • Half angle of view (degree) 42.76
  • Image height 21.64 mm
  • Lens length 89.32 mm
  • BF 11.72 mm

Embodiment 2: RF 23mm f/1.8

  • Focal length 23.28 mm
  • F number 1.85
  • Half angle of view (degree) 42.90
  • Image height 21.64 mm
  • Lens length 93.32 mm
  • BF 12.72 mm

Embodiment 3: RF 20mm f/1.8

  • Focal length 20.60 mm
  • F number 1.85
  • Half angle of view (degree) 46.40
  • Image height 21.64mm
  • Lens length 88.73 mm
  • BF 11.72 mm

More Canon patents are listed here. Some particularly interesting patent applications we think might get into production are these:

Canon Patent: Full Frame Lenses With Front And Rear Apodised Optical Elements

Canon Patent

A new Canon patent application for lenses with apodised optical elements on the front and back of the lens barrel. While not 100% sure I guess these are also lenses for the RF mount.

Canon patent application 20210124182 (USA) discusses optical formulas for full frame lenses with apodised elements on the fron and back of the lens. The lenses found in the patent literature:

  • 135mm f/2
  • 130mm f/4
  • 70mm f/1.2
  • 24mm f/1.4

More Canon patents are listed here. Some particularly interesting patent applications we think might get into production are these:

Source: NL