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I guess that 1 year later you shouldn't work on this anymore, but for every one that need the grayscale too, here my solution. For reference I've found here that we can set : s->set_special_effect(s, 2); Where 2 is grayscale effect. 0 - No Effect 1 - Negative 2 - Grayscale 3 - Red Tint 4 - Green Tint 5 - Blue Tint 6 - Sepia // Camera init esp_err_t ...


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