How can one properly validate image questions such that it only accept jpg or jpeg only,the image size not more than 100kb.
I also want the upload button disabled,we prefer the direct capturing.
Thank you
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Hi Valentine_Onuchukwu,
To restrict uploading of a new image, use 'new' under appearance for the image question
To restrict the quality and size, use the 'max-pixels = 100' to restrict the longest image width to 100 pixels.
ODK saves images captured in jpg format.
More details in the documentation https://docs.getodk.org/form-question-types/#image-widgets
If you wish to restrict the precise file size (not image dimension size!) to 100kb, then you will probably need to tweak the provided max-pixels dimension to something the produces a JPEG that will reliably be under your 100kB limit. Note, because JPEG uses a variable-sized compression algorithm, the exact max-pixels dimension that result in 100kb is somewhat unpredictable... [although there are a few online tools that will try to compress to approximately a specific size...].
So your best bet might be to try out a few of your expected images, and pick a max-pixels that will give you something small enough to fit your needs.
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