ChatGPT to API read tests

shutterspeed1000 · Monday at 8:05 PM

Anyone trying to use ChatGPT or Gemini to read test tests? I have been getting pretty good results allowing it to match the API test samples to scanned cards or RGB charts I created.

Has anyone else tried this and gotten good results?

Dan_P · Tuesday at 4:27 AM

shutterspeed1000 said:
Anyone trying to use ChatGPT or Gemini to read test tests? I have been getting pretty good results allowing it to match the API test samples to scanned cards or RGB charts I created.

Has anyone else tried this and gotten good results?

I have not asked ChatGPT for this type of help.

I suppose success depends on consistent lighting.

kboogie · Tuesday at 5:57 AM

Interesting use case. Like @Dan_P said the biggest issue with color matching test is consistent lighting between the sample and the reference chart.

This is another reason why I use Hanna Checkers. Especially for items where there is a need for anything other than a binary understanding or a test that doesn’t use titration.

Gumbies R Us · Tuesday at 7:27 AM

I personally wouldn’t trust ai with answering something like that (not to mention I wouldn’t trust api kits to begin with, haha). However, it is interesting that it is able to read the results and give you an answer on it

shutterspeed1000 · Tuesday at 8:37 PM

I have been getting pretty good results. I take the picture of the sample on a white background and I am getting results very close to my Hanna testers. If anyone else wants to try, here are the color charts I have made so far. I used linear interpolation to get smaller values. If anyone tries them let me know how it works for you. Zero guarantees it reads right, just for fun lol.

Fun experiment I will probably use at this point. I can't see color well at all so these keep me from bugging my wife.

kboogie · 2025-01-15T11:50:46-0500

shutterspeed1000 said:
I have been getting pretty good results. I take the picture of the sample on a white background and I am getting results very close to my Hanna testers. If anyone else wants to try, here are the color charts I have made so far. I used linear interpolation to get smaller values. If anyone tries them let me know how it works for you. Zero guarantees it reads right, just for fun lol.

Fun experiment I will probably use at this point. I can't see color well at all so these keep me from bugging my wife.

I like your use of linear interpolation to define the color gradient. However, you need to ensure that you control for the consistency of light (similar to white balances for a picture) and recalibrate accordingly.

shutterspeed1000 · 2025-01-15T21:47:36-0500

kboogie said:
I like your use of linear interpolation to define the color gradient. However, you need to ensure that you control for the consistency of light (similar to white balances for a picture) and recalibrate accordingly.

Yes, I use the background to set white balance. I am using these instructions in GPT4o to get the color.

Center Region Sampling: Use only the central region of the liquid in the test tube to avoid edge distortions caused by the glass curvature or lighting.

Averaging Multiple Areas: Divide the sample area into a grid and calculate the average color from multiple smaller regions to mitigate localized discrepancies

Crop to Relevant Area: Automatically crop to focus only on the liquid region of the test tube, avoiding borders or background.

Color Normalization: Normalize the image's color using background

Noise Reduction: Apply a Gaussian blur or similar technique to reduce random noise in the image

I scanned the original cards with my flatbed that has been profiled.

Amazing what python can do with image manipulation.

jabberwock · 2025-01-15T21:48:52-0500

shutterspeed1000 said:
Anyone trying to use ChatGPT or Gemini to read test tests? I have been getting pretty good results allowing it to match the API test samples to scanned cards or RGB charts I created.

Has anyone else tried this and gotten good results?

what are "test tests"?