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Cinema 4d studio templates1/29/2024 If I had to check for something like that, I'd use a program like Hugin to align the simulated image with the photographed image, and see where and how the images don't align perfectly. Simplified, an error in "sensor size" or focal length would mean you'd have to scale your simulated image wrt the photograph, differences in aspect ratio's would give rise to bands where you have no image (either photo or simulated).ĭistortions otoh would be a lot more difficult to correct. Thanks for the reminder of the sensor size - I had forgot where the 35 had come from.Wouldn't lens distortions cause you a lot more trouble than a few pixels more or less ? "Will the real Canon review image please stand up?" So, it is a question of knowing your sensor and choosing what you want to use. These are from actual raw file meta-data for a Sigma SD14 DSLR I'll leave you to puzzle out what is what but the proprietary converter saves hi-res (not binned) images as 2640x1760px (EPSEmuPrevDims tag above).ĭifferent converters can pick different meta-data tags from the raw file, some show the dark mask, some show parts of it, some don't show any of it. Thanks for the reminder of the sensor size - I had forgot where the 35 had come from.Īny ideas?Just give you some real data about the subject at hand from a Sigma SD14 raw file:ĬMbM:EPSEmuPrevDims Type=2 (long), Dimensions=1 (D0) (2)ĬMbM:KeepImageArea Type=1 (long), Dimensions=1 (D0) (4)ĬMbM:ActiveImageArea Type=1 (long), Dimensions=1 (D0) (4)ĬMbM: DarkShieldTop Type=1 (long), Dimensions=1 (D0) (4)ĬMbM: DarkShieldBottom Type=1 (long), Dimensions=1 (D0) (4)ĬMbM: DarkShieldColRange Type=2 (long), Dimensions=2 (D0, D1) (2x2) This process happens on most jobs, sometimes it's easy, sometimes not, depending on the data: Then I'm scratching my head wondering, was the camera level, have I calculated the right amount of lens shift, and now, do I have the correct focal length. It's surprising how small errors can cause a headache when figuring out why I can't get my geometry to line up with the photograph. I guess it may seem a bit finicky - I find it interesting though and if I can keep things accurate where I have the available information then it helps to diagnose/rule out this from other problems when they arise. to remove any confusion, I appreciate that for 3D modelling you do need absolute figures and being a coder myself, although not at your level, I do appreciate your desire to get it right. Hope that's helpful, if only for the background info. the 24mm dimension plus a bit each side for sprocket holes, since the 36mm dimension of frame was along the length of the film. The '35mm' refers to the width of the roll of film i.e. The physical size of 'full frame' should be 36 x 24mm as George has noted. Particularly why get bogged down in masked pixels?ĩ9.99999999999999% of users don't even know they're there, far less will ever see them. Or you might want to check the camera manual to see what Canon say it is and use those figures. I think you're getting far too hung up in numerical measurements rather than just using what the vast majority of people will see - which I'd guess would be the Adobe size, since many more people will use that application compared to the others. The analogue films where 35mm width, and the frames where 36x24. The sensor size is a string in memory or program, it's not measured. It wasn't until recently that I discovered that images tend to be cropped slightly so I'm thinking that perhaps I'm loosing accuracy straight away so I'm hoping to tighten up my workflow.Īny ideas?Stay to 1 converter as you should always do. I'm asking because I sometimes need to create virtual cameras inside of 3D packages - I need to match that of a photographed scene as accurately as possible so I use the sensor size, and lens info from the metadata and plug these into my 3D software. I'm wondering which of the processing methods represents the 'Full' Frame? And whether this is 35mm or 36mm wide? And whether the principle point of my photographs is offset from the centre of my processed photographs. Note these are on the LHS and Top of the image) = 5920 x 3950Īnd in the Canon 5D3 specs it says sensor size is: '35mm (36.0mm x 24.0mm)' A comparison between RAW processing (CR2) using different software yields these different resolutions:
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