Its been a ton of time since I last did any updates on the ol’ human sized hexapod! I finally decided to go for dedicated motor controller ICs (Allegro A4950) as opposed to a discrete solution. These chips were pretty expensive (~£27 for the entire board…) driven by an STM32F030 once again generating software PWM. […]
I’ve previously got the STM32F0 discovery board working with a FIFO (AL422b) version of the OV7670, not a particularly hard feat and many others have achieved this across the internet. From what I can find however, nobody has managed to interface an OV7670 with an STM32F0 without external memory or a FIFO! Today however, thats all […]
A couple of people requested the pinout that I’ve used for my board, I’ve uploaded this below. Cyclone4 FPGA Boardschematic_v200
In my last post, I was talking about image compression methods, mainly DCT transform based along with colour transform based. I’ve now combined these together and have managed to break the 6fps barrier for video over UART! I’ve implemented 2:1:1, 4:1:1 and 8:1:1 subsampling (I think I can call it that?) with reasonable performance! The […]
Image compression is a massive topic and to be honest, a bit of a buzzword title. Images can be compressed in multiple ways. One of the simplest being reducing the bit depth of the image. Reducing the bit depth is a pretty poor method of compression though and generally produces weird banding results as could […]
As of yesterday, I’ve got a new laptop (woop woop I7-7700HQ)! Obviously that meant transferring data over though a bit of WiFi and an overnight transfer deemed me ready to rock this morning. I do however have an exam in a week which I should probably start revising for so this will be my last […]
As I mentioned in my last post, I wanted to try some image segmentation! I had a quick go at histogram based segmentation where the largest peak of the histogram was used to find the most occuring pixel (after the colour range was bit crushed) but this didn’t have particularly useful results. This could be […]
