Comments (7)
The image looked posterized, so i checked the histogram. Here is the histogram of image bytes:
See that periodic structure? There are ranges of values, each is 16 units wide. This doesn't look like a random error.
Here is a histogram of bits in your image. It makes me think that two wires/pins from the camera are not connected. If i'm not mistaken, that's D7 and D6:
from esp32-cam-demo.
If you are using OV7725 in grayscale mode, http://your-ip/get
returns raw image (without any headers), one byte per pixel. /pgm
should return the same, plus PGM header. I can't really tell whether this result you get is due to an issue with hardware, code, or the viewer.
Can you attach this PGM file you get, or post a link to it?
from esp32-cam-demo.
Yes, sure, thank you very much for the swift reply.
Using 7725 camera, hardware data pin is D2-D7 (D0 D1 should be not used right?), Reset pin set to IO15, the rest is fully same.
pgm.zip
Also when I turn on "[ ] Enable test pattern on camera", and also OV7725 and OV2640, the test pattern not working. One more question, is OV2640 also supported now?
Thank you!!
from esp32-cam-demo.
from esp32-cam-demo.
OV2640 is supported now, although it is still has some random glitches in JPEG mode at 20MHz (might be signal integrity issue on WROVER-KIT board).
W.r.t. test pattern not working, can you give more info? Any error log? If there is no error, do you get some image instead?
from esp32-cam-demo.
Thanks, will check this and let you know later.
from esp32-cam-demo.
need some time to check it, will close it now, thanks for support
from esp32-cam-demo.
Related Issues (20)
- camera probe failed (0x20001) with OV7670 HOT 7
- OV7725 in esp32 HOT 1
- *** No rule to make target 'C:/........./sccb.c', needed by 'sccb.o' Stop. HOT 1
- OV2640 jpeg image with pixelated edges HOT 2
- Camera Issue
- The make is failing HOT 3
- IO Expander HOT 1
- 0v7725 rgb565 HOT 1
- Unable to build from source - esp_http_server.h problem HOT 1
- How to save captured images to computer through wifi?? HOT 1
- Red Board OV2640 - solved HOT 5
- Download to computer
- Newbie of Ai Thinker with OV2640 : Camera probe failed with error 0x20001
- dear all, just clone esp-who, that one works plus it uses the latest driver for cameras
- Sometimes a black screen HOT 1
- How to read individual pixel values in a frame or image. HOT 1
- OV7725 has different pins than those mentioned in README.md
- Need pin mapping for ov7725 esp-cam module
- Do you have an image of the ov2640 Color Bar?
- [-Werror=unused-const-variable=]
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from esp32-cam-demo.