| Electronics > Projects, Designs, and Technical Stuff |
| HDMI zoom/pan dongle? |
| (1/1) |
| nfmax:
Does anyone know of a device with an HDMI input and output that can select a window within the input image and magnify it (e.g. by repeating pixels) onto its output? An elderly relative with macular degeneration lost her old video magnifier, which used a builtin CRT display and could do this, in a house fire. The replacement is much smaller and does OCR and text to speech, but doesn't offer simple magnification :palm: Really don't want to have to use a second device like a USB microscope, with controls that are not optimised for the partially-sighted (or in some cases, for any sort of human) It sounds like a pretty simple job for an FPGA with the right IO, but I haven't done anything with FPGAs for nearly 30 years (the very first, original Xilinx chip!) |
| NiHaoMike:
Any modern PC should be capable of it as part of the window manager. |
| nfmax:
--- Quote from: NiHaoMike on April 02, 2019, 12:39:30 am ---Any modern PC should be capable of it as part of the window manager. --- End quote --- Indeed. But although the reader device obviously uses an embedded PC (judging by the time it takes to boot) there is no way to access its window manager. :( Possibly a Raspberry Pi with an HDMI input board might work in this way - but I have no relevant experience and insufficient knowledge to determine this. |
| PETER ERSKINE:
--- Quote from: nfmax on April 01, 2019, 07:31:09 am ---Does anyone know of a device with an HDMI input and output that can select a window within the input image and magnify it (e.g. by repeating pixels) onto its output? An elderly relative with macular degeneration lost her old video magnifier, which used a builtin CRT display and could do this, in a house fire. The replacement is much smaller and does OCR and text to speech, but doesn't offer simple magnification :palm: Really don't want to have to use a second device like a USB microscope, with controls that are not optimised for the partially-sighted (or in some cases, for any sort of human) It sounds like a pretty simple job for an FPGA with the right IO, but I haven't done anything with FPGAs for nearly 30 years (the very first, original Xilinx chip!) --- End quote --- Windows magnifier should work. |
| nfmax:
THIS IS NOT A PC! :palm: It is a standalone visual aid for the partially sighted. There is no access to the internal gubbins |
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