Hyperfocal distance of D435i RGB camera.
Hello, Im new to the Realsense module and was working on a project wherin object have to captured from close distance( and therefore should be clear at close distance ). I therefore wanted to know the hyperfocal distance of the realsense RGB camera module. I wasn't able to find it in the datasheets.
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Hi Chandannaik999 I do not have an exact figure for hyperfocal distance (the distance below which the image can become blurred) when performing close range sensing. On the D435 / D435i models though, a RealSense user was advised in the link below that whilst you may be able to move closer to an object than the D435i's minimum depth sensing distance of 0.1 meters (10 cm), the image may become blurred at 0.06 m (6 cm) or less because the imaging sensors of the D435 / D435i are not designed for such close range.
https://github.com/IntelRealSense/librealsense/issues/7631
If you only require the RGB image and not depth then you may be able to clear up blurring a little at very close range by using SDK options such as maximizing Sharpness, as discussed in this link:
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If you are only using RGB then distance from the object should not be so much of an issue. To demonstrate this I used a D435i to capture keyboard keys at 1, 2 and 3 cm height from the keyboard respectively to highlight the blurring that might be expected at extreme close range.
These are unaltered images with no sharpening applied to them.
1 CM
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3 CM
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