Scanner camera project -2.0

For more information:
www.projectese.com
or
http://www.flickr.com/photos/projectese/sets/72157623187612134/

Category:

Science & Technology

Tags:

• scanner
• camera
• large
• format
• megapixel
• gigapixel
• amazing
• epson
• canon
• scancam
• flatbed

[qq315465327]

Hi Daxrx7,

You said that the camera need a calibration phase before each shot. I wounder how you calibrate the camera(or sensitivity)? Do you estimate the iso of the sensor?

Please reply I am so curious. Thank you!!!!

[daxrx7]

@qq315465327 about the ISO, I replied to your message on Flickr, and for the calibration, it uses a blinking LED to adjust the levels. you can make some adjustements changing the brightness of the LED, and I do it only by trial and error. But isn't something that you adjust every time. All the parameters are almost fixed (even the F/stops because you need to be in the sweet spot of the lens) so to adjust the exposure you need to change the light itself using lamps and ND filters.

[qq315465327]

@daxrx7 Thanks for the reply.

I am more used to 135 film and some concepts in your reply are not clear to me. what are you calibrating exactly? For first I thought you are adjusting iso but it seems that you are not. "blinking LED to adjust the levels?" I am not sure what "levels" you refering to. For adjusting exposure, can I sacrifice image quality in order to change f stop? I think changing f stop is an easier way instead of using ND filters.

[daxrx7]

@qq315465327 the levels are the white and black absolute levels. but it's not an actual calibration, it feels more like if the scanner chooses a preset for different light situations. anyway, you can change the ISO using the led, but not much. Yes of course you can change F/stops, but when you are dealing with a camera with 100+MPixels you are really trying to take the best out of the lens. Also focusing and managing the DOF is extremely critical with such a camera.

[YeahYeahYeahs8]

I have a question: Do you project the image directly to the CCD sensor, or do you use a diffusing focal plane just in front of the scanners glass? Thank you!

[daxrx7]

@YeahYeahYeahs8 Yes, directly on the sensor. By the way I'm making a website about the camera with a lot of details. By now I''ve written only a couple of pages, but you already can find some useful information: the address is in the video description.

[qq315465327]

@daxrx7 (continue)I am looking for a solution of using scanner as fixed iso film and operate the camera as a normal camera.

[daxrx7]

@0Orion yes, large format is the best, but it's not easy with this camera: the resultig image is not like the A4 sheet, but a 5x30cm rectangle. If you want to cover a painting with the entire projection you have to scan several times, shifting the back (or you can take the picture from a longer distance, wasting a lot of pixels. If you aren't a large format photographer maybe it's not immediate to understand but in my flickr gallery (link in the decription) you will find a lot of information.

[0Orion]

Btw, I also like Camel - Sahara... great song

[0Orion]

Awesome! Thanks for the video!

My mom is a painter and I'm thinking about something like this for artwork reproduction. I think a large format camera seems like the only way to digitalize large paintings at a resolution for reproduction.

what do you think?