| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| nstarli | "Where can I find the blue calibration card? I could not find it on the public lab store. " | Read more » | over 4 years ago | |||
| warren | " Hi! Noting this project which may be of interest: https://gitlab.com/bath_open_instrumentation_group/picamera_cra_compensation And pinging @magg..." | Read more » | almost 5 years ago | |||
| petter_mansson1 | " Hello, my input might guide you in the right direction. Different environments require different settings so it might be hard to generalize. I did..." | Read more » | almost 5 years ago | |||
| cagiva | "@cfastie, You were absolutely correct. The Blue card from PublicLab arrived today so I redid the white-balancing calibration with it and I got much..." | Read more » | over 5 years ago | |||
| cfastie | "Performing a custom white balance on a blue-filtered NIR camera fools the camera into exaggerating the brightness of the red channel. The red chann..." | Read more » | over 5 years ago | |||
| warren | "@warren awards a barnstar to Claytonb for their awesome contribution! " | Read more » | almost 6 years ago | |||
| cfastie | "Setting a custom white balance on the Mobius camera can be done numerically. Determining which numbers to use requires trial and error and subjecti..." | Read more » | almost 7 years ago | |||
| suman | "Dear Cfastie, Very informative. Thanks for posting. I was interested to know, which method is more preferred and accurate, whi..." | Read more » | almost 7 years ago | |||
| suman | "Dear Warren, I am currently looking some literatures on Image Vignetting Correction. I will definately post back after i come ..." | Read more » | almost 7 years ago | |||
| warren | "Ah, i've just learned that I didn't know the definition of vignetting. But I do now -- apologies for mixing this up! I haven't heard anything about..." | Read more » | almost 7 years ago | |||
| suman | "Dear Warren, I checked about the lens vignetting correction under the tag Lens-distortion as you mentioned. However, i didn't ..." | Read more » | almost 7 years ago | |||
| suman | "Thanks for your prompt response warren.....highly appreciable.... Cheers " | Read more » | almost 7 years ago | |||
| suman | "Thanks for your prompt response warren.....highly appreciable.... Cheers " | Read more » | almost 7 years ago | |||
| warren | "There are a few different approaches to this too, but one which definitely works is documented alongside an in-progress web-based approach, both un..." | Read more » | almost 7 years ago | |||
| suman | "Thanks for your response warren and Chris...I highly appreciate it..I was also interested to know about the vignetting effect and how public labs i..." | Read more » | almost 7 years ago | |||
| cfastie | "Do you think i need the targets of known spectral reflectivity in the same bands that will be used to compute NDVI or it can be tested with any mat..." | Read more » | almost 7 years ago | |||
| warren | "Hi -- well, there may be methods like that; just to put in another idea, although you probably won't want to do it; Dorn Cox from Farm Hack has act..." | Read more » | almost 7 years ago | |||
| suman | "Some initial results using your white balance settings are impressive, however in this particular picture the roof of the house is showing high pho..." | Read more » | almost 7 years ago | |||
| suman | "Great.... For the accurate dense reconstruction with my mobius setup with wide angle lens, i have figured out best way. There is no option to work..." | Read more » | about 7 years ago | |||
| cfastie | "Stitching Mobius photos can be hard. The longer lens will help. Correcting the distortion afterwards can help. A high shutter speed and vibration d..." | Read more » | about 7 years ago | |||
| suman | "Dear Chris, Thanks for sharing the publication. My main purpose is to test the potential of calculating NDVI using modified infra..." | Read more » | about 7 years ago | |||
| cfastie | " The red filters typically used do not transmit much green light, so the green channel captures mostly NIR. Some yellow filters pass red and green,..." | Read more » | about 7 years ago | |||
| suman | "Dear Chris, First of all thanks for your prompt reply. I have few more things which i am confused about: 1. If i put a red filter,..." | Read more » | about 7 years ago | |||
| cfastie | "When the NIR cut filter is removed from a camera, all three color channels capture NIR light in addition to the color they originally captured (R, ..." | Read more » | about 7 years ago |