WEBVTT 00:00.170 --> 00:00.650 Great. 00:00.650 --> 00:06.440 The camera is now plugged to the Raspberry Pi, so the hardware setup is done and we can take some photos. 00:06.440 --> 00:10.520 We will start with the terminal and then we will see how to do the same thing with Python. 00:10.520 --> 00:12.260 So you can open a terminal. 00:12.260 --> 00:15.680 And well we are in our home directory. 00:15.680 --> 00:20.780 But what I'm going to do is I'm going to create a new folder here so that we can put the photos inside 00:20.780 --> 00:22.790 this folder and not just anywhere. 00:22.790 --> 00:29.120 So let's create here with mkdir a camera folder for example okay. 00:29.240 --> 00:32.780 And you see now I have my camera folder here. 00:32.810 --> 00:33.290 Great. 00:33.320 --> 00:37.730 Now what is the command that you can use to take a photo from the terminal. 00:37.760 --> 00:41.420 The command is RPI cam and then dash. 00:41.840 --> 00:44.630 Still okay with RPI cam. 00:44.630 --> 00:46.220 Dash still you can take a photo. 00:46.220 --> 00:50.240 Let's run that to see just with no other parameter. 00:51.140 --> 00:52.370 And you're going to see some logs. 00:52.370 --> 00:53.660 It's going to open a preview. 00:53.660 --> 00:55.700 So you see I can say hi. 00:55.820 --> 00:59.000 And the preview is going to be here for about five seconds. 00:59.030 --> 00:59.420 All right. 00:59.420 --> 00:59.960 And that's it. 00:59.960 --> 01:04.160 But this is not going to take a photo actually it's just a preview okay. 01:04.190 --> 01:07.230 So when you run this command it's is going to open a preview. 01:07.230 --> 01:13.710 If you want to save a photo to a file, you will need to do the same command with dash o for output 01:13.710 --> 01:16.110 and then put a file name. 01:16.380 --> 01:18.000 So for example test. 01:18.000 --> 01:22.860 And then we're going to use the JPG extension okay we create a JPEG. 01:22.860 --> 01:27.210 So here the extension is quite important when you create a file for a photo. 01:27.210 --> 01:32.040 And well I'm not just going to create this file here in the home directory okay. 01:32.070 --> 01:34.800 We have just created a camera folder. 01:34.800 --> 01:37.620 So I'm going to put this file inside the camera folder. 01:37.620 --> 01:39.090 And here we have two options. 01:39.090 --> 01:44.610 First I could have just navigated to the camera folder and just run that command. 01:44.610 --> 01:48.450 But I can also provide the path directly here. 01:48.450 --> 01:54.150 So I can do camera slash test dot jpg okay. 01:54.150 --> 01:55.920 Because I'm in my home directory. 01:55.920 --> 01:59.520 So I just need to go to camera first and then I can save the file. 01:59.520 --> 02:01.080 Let's run that again. 02:01.080 --> 02:03.450 And this is going to open the preview. 02:03.480 --> 02:05.760 This is going to take a photo. 02:09.270 --> 02:09.720 All right. 02:09.720 --> 02:11.320 And then exit Now. 02:11.350 --> 02:13.960 Well, let's just open the file manager here. 02:14.500 --> 02:19.000 If I go to my camera folder, I have my test dot jpeg. 02:20.560 --> 02:21.640 Let's open it. 02:21.640 --> 02:24.520 And the first thing you can notice maybe is that. 02:24.520 --> 02:26.410 So this is actually the ceiling. 02:26.410 --> 02:28.900 So the photo is upside down. 02:28.930 --> 02:29.230 All right. 02:29.230 --> 02:32.080 Just because that's where that's how I placed my camera. 02:32.080 --> 02:33.850 So the photo is upside down. 02:33.880 --> 02:37.390 I could just change the position of the camera if I wanted to. 02:37.420 --> 02:40.570 But I'm going to leave it like this and let's see how to fix that. 02:40.570 --> 02:44.830 So first you see we can rotate the image twice like that. 02:44.830 --> 02:47.530 So we can rotate the image by 90 degrees twice. 02:47.530 --> 02:50.920 And the image is correctly placed which you can see. 02:50.920 --> 02:52.630 The door here is on the right. 02:52.660 --> 02:57.910 I'm going to put it back like this just to show you that there is actually another way you can do that. 02:58.030 --> 03:03.880 So if you go on edit, you see you have the rotate, but you can also flip the image. 03:04.240 --> 03:06.700 So we can flip the image vertically. 03:06.700 --> 03:09.340 And well, if you remember the door was on the right. 03:09.340 --> 03:14.500 So if you flip the image vertically you also need to flip the image horizontally. 03:14.500 --> 03:18.330 And then it's like if you do a 180 rotation. 03:18.330 --> 03:23.160 And I showed you this because, well, we have an option in the command line tool. 03:23.160 --> 03:25.920 And I'm also going to be the same option for Python program. 03:25.920 --> 03:27.600 So I'm going to run the same command. 03:27.630 --> 03:32.520 You see I use the up arrow to go back to the previous command. 03:32.790 --> 03:37.290 And then I'm going to do dash dash v flip. 03:37.320 --> 03:37.560 Okay. 03:37.590 --> 03:39.930 So vertical flip and then dash dash. 03:39.930 --> 03:41.340 So with two dashes here okay. 03:41.370 --> 03:45.240 It's quite important H flip for horizontal flip. 03:45.240 --> 03:49.470 And that's going to do exactly what I just did here with the display. 03:49.470 --> 03:51.840 So now I'm going to run this command. 03:52.920 --> 03:53.160 Okay. 03:53.190 --> 03:55.440 It's going to take a photo. 03:56.700 --> 03:59.010 So you see it's stabilizing taking a photo. 03:59.010 --> 04:01.680 And then well the file has been replaced. 04:01.710 --> 04:01.890 Okay. 04:01.920 --> 04:07.560 So if you take a photo and you use the same file name, it's going to replace whatever file was with 04:07.560 --> 04:08.430 the same name. 04:09.210 --> 04:12.660 Now you can see the photo is correctly orientated. 04:12.660 --> 04:13.710 It's not upside down. 04:13.710 --> 04:22.300 And finally what you can do is well you see that the file size is 1.4MB here with that resolution. 04:22.330 --> 04:22.510 Okay. 04:22.540 --> 04:26.800 So this is the resolution actually for the module three of the camera. 04:26.800 --> 04:30.820 If you have the module 1 or 2 the resolution is probably going to be lower. 04:30.820 --> 04:33.400 But still you can see the photo is 1.5MB. 04:33.430 --> 04:34.480 It's not too big. 04:34.480 --> 04:40.000 But then let's say you want to send the photo by email or to send it over the internet. 04:40.030 --> 04:44.260 Well, if we can find an easy way to reduce the size, that's going to be better. 04:44.260 --> 04:47.200 So we can actually lower the resolution. 04:47.200 --> 04:48.670 And I'm going to show you first. 04:48.670 --> 04:51.340 So this is specific to the version three of the camera. 04:51.340 --> 04:56.080 But then I'm going to show you also with the documentation where you can find more information. 04:56.080 --> 04:58.300 So what resolution can we use. 04:58.300 --> 04:59.260 You see that. 04:59.260 --> 05:02.110 So we have some logs here that's quite useful. 05:02.110 --> 05:03.340 This is the resolution. 05:03.340 --> 05:06.520 This is the max resolution for this camera. 05:06.520 --> 05:12.550 And then you can see we also have another mode which is half another mode which is one third okay. 05:12.580 --> 05:17.230 So if you multiply this by three you're going to get exactly those values. 05:17.260 --> 05:17.530 All right. 05:17.560 --> 05:22.840 So what we're going to try to do is to take a photo with that resolution here. 05:22.840 --> 05:31.370 And I would recommend especially for the camera module V3 to use a multiple of those resolutions here. 05:31.370 --> 05:33.290 So that one, that one or that one. 05:33.290 --> 05:34.070 Why is that? 05:34.070 --> 05:39.710 Because if you use something different, the image actually might be cropped in a weird way, or you 05:39.710 --> 05:43.280 might miss a lot of information on the image, you can try by yourself. 05:43.280 --> 05:48.020 But here I'm going to use then this resolution here how to change the resolution. 05:48.020 --> 05:51.170 So I'm going to use the up arrow with the same command. 05:51.170 --> 05:54.260 And then I'm going to use dash dash width. 05:54.290 --> 05:59.840 The width is going to be so width and then space 1536. 05:59.840 --> 06:08.060 And then another option dash dash height with this time is going to be 864. 06:08.210 --> 06:08.450 Okay. 06:08.450 --> 06:11.360 So you see we have the dash o option for the output. 06:11.360 --> 06:17.780 And then with two dashes we have vertical flip horizontal flip width and height. 06:17.780 --> 06:22.220 I'm going to press enter okay. 06:22.250 --> 06:23.330 It's going to take a photo. 06:23.330 --> 06:25.370 So the preview and then the photo. 06:26.030 --> 06:26.630 Great. 06:26.630 --> 06:28.430 I go back to my file. 06:28.460 --> 06:33.640 You see the photo is well as you can see it has been zoomed a bit. 06:33.640 --> 06:35.980 So if you remember we could see the shelf here. 06:36.010 --> 06:39.490 Okay, so for that you may experiment with different resolutions. 06:39.520 --> 06:39.760 Okay. 06:39.790 --> 06:42.430 Here I'm going to keep that one which is good enough. 06:42.430 --> 06:46.660 And you can see now the file is about 200 something kilobytes. 06:46.660 --> 06:47.770 So that's much smaller. 06:47.800 --> 06:49.000 That's more than six. 06:49.030 --> 06:50.710 That's about six times smaller. 06:50.890 --> 06:56.680 So that's quite good because let's say you want to take photos and store them on your SD card. 06:56.680 --> 07:01.360 And you want to take a photo every, let's say, one minute and store them for several days. 07:01.360 --> 07:07.000 Then if the image can be six times smaller, that's going to be much better for you to handle that. 07:07.000 --> 07:09.370 But well, that's going to depend on your application. 07:09.370 --> 07:12.310 Maybe you need a higher resolution, maybe a lower resolution. 07:12.490 --> 07:14.080 That's going to depend every time. 07:14.080 --> 07:17.350 Now to know which resolution you can use anyway. 07:17.350 --> 07:19.630 You're going to use that command here okay. 07:19.660 --> 07:21.340 It's going to be the same for everybody. 07:21.370 --> 07:27.730 But then you can just go on, open a web browser and you type Raspberry Pi camera documentation, and 07:27.730 --> 07:30.010 you're going to get to the documentation here. 07:30.280 --> 07:33.370 So you can see the URL here. 07:33.400 --> 07:35.830 Raspberry pi.com/documentation. 07:35.830 --> 07:37.220 Slash Accessories. 07:37.520 --> 07:38.330 Cameras. 07:38.600 --> 07:39.470 HTML. 07:39.890 --> 07:41.120 The URL might change. 07:41.120 --> 07:46.370 That's why I recommend you that you search it on Google and you should get to a page like this. 07:46.400 --> 07:46.700 Okay. 07:46.730 --> 07:47.750 And you can go down. 07:47.750 --> 07:52.700 So basically you have lots of information about the different camera modules you see about the cable 07:52.730 --> 07:53.750 etc.. 07:53.840 --> 07:58.700 And here that's what's interesting for us now. 07:58.790 --> 08:02.870 It's the hardware specification for the different camera modules. 08:02.870 --> 08:05.150 So the v1 here v2 and v3. 08:05.150 --> 08:10.550 So as I told you the main difference is going to be on the resolution here we have five megapixels and 08:10.550 --> 08:12.860 then eight and then 11.9. 08:12.980 --> 08:18.080 And the sensor resolution here you see that's the one. 08:18.080 --> 08:20.600 So that's the default one that we have used. 08:20.660 --> 08:23.480 Then we used the third of that resolution. 08:23.480 --> 08:27.560 But you can see for the V2 for example it's a different resolution. 08:27.560 --> 08:32.480 So depending on that value you might try to use something different. 08:32.480 --> 08:34.370 And you might need to experiment a bit. 08:34.400 --> 08:38.900 Try to find a resolution that both looks good okay. 08:38.930 --> 08:40.880 That doesn't crop the image too much. 08:40.880 --> 08:42.890 And that is also not too big.