Is there an app for me that easily puts a green screen in the background for photos without manually erasing the background?

I have a green screen but I wanted to exchange different backgrounds on the photos via my phone. I was wondering if there was a reliable and easy application that detects the green screen and can change the backgrounds (Android or iOS).

Photos fears for the edition

I really do not like the pictures (I thought I could get used to it) but I would like to use iPhoto again. It is in my apps, but was replaced by a newer version when my files were installed on the new Mac. When I click on iPhoto, it is indicated that we must update the library before we can use it. Question: I use Sierra 10.12.6 and I'm worried about compatibility because I read scary things. You do not want to end up in a jam or a pile of lost photos. Has anyone ever made this upgrade with Sierra in order to use the latest iPhoto? And everything worked like clockwork? Enjoy any help on this.

aspect ratio – How can I prevent my Canon Selphy CP1300 from trimming my photos without getting a large border?

My smartphone takes pictures with a different report than the Canon Selphy CP1300 (10×15 cm).

When I print the picture using the "Canon PRINT Inkjet / SELPHY" application on my phone using the default software Without limits configuration, the printer cuts the photo vertically. When I set it up as bordered, the printer adds a large border both horizontally and vertically!

How can I ask the printer to print the photo as large as possible without trimming it (ie with a zero height border and a minimal horizontal border)?

pd: if possible, without using photo editing software to add a fictional horizontal border in order to get the same report as the printer.

accessories – Nikon Df: a way to send photos on ipad in real time

What you ask is called attachment, whether wired or wireless.

I own and use a CamRanger to wirelessly control, display, and preview images from my Nikon DSLR on my iOS and Mac devices.

Alternatively, TetherTools has many resources to control some wired and / or wireless cameras, using a variety of host software and mobile devices: Tethertools.com resources for Nikon Df.

Computer Vision – How to find the corresponding points between two photos when there is a repeated pattern?

Suppose I have two photos, I1 and I2 and I want to find a set of corresponding points between the two photos in order to define a homography between them. There are many algorithms for this purpose, namely SIFT which is invariant on the scale. The problem is that when there is a pattern in both photos (like repeated windows), SIFT starts to fail and most of the corresponding points cited are false and outliers. So what can I do in such cases?

How can I avoid this problem? Are there any other algorithms that behave better when there is a pattern in both photos?

Does anyone know what is this diffuse pattern that appears in all my photos and can it be corrected?

This diffuse pattern appears in all my recent photos. I do not know what it can be. The camera is a Canon.

google photos – How to share an album of albums once?

I want to share different sets of images with different people – for example, a set of pictures for the family, others for friends, another for coworkers, and so on. But the images I want to share are not static – I wish to add more images and albums over time. But I do do not I want to create a new share each time I add a new album, because this is going to be a big hassle – I want everything in the same place to share it once. Ideally, people would be automatically notified after adding new items, but if there is no option to turn them on or off, it's not as critical.

The problem is that once I've created an album, it seems like I can not create any subfolders in this one. With thousands of images to share, grouping them into a single album is not an option either. I will not know either the complete set of albums at one time because I will always add new albums. How can I share once and deal with it?

Update: It seems that in Google Photos, it is not possible to create folders (or sub-albums) in an album. How do people manage their albums? It will really get out of hand to have hundreds or even thousands of albums in a flat structure for myself and for everyone with whom I share them!

Update 2: I was thinking of experimenting with this option to see if I could create photo collections in Google Drive, although I have no idea how far this would be available. But I tried to go on Google Drive under Settings -> Create a Google Photos Folder. But after this is verified, nothing happens! Nothing indicates that something is happening and I do not see any records of this type!

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sharpness – What is the best way to downsample photos to increase sharpness

What is the best way to downsample photos to increase sharpness?

If I have a photo in raw format with a resolution of about 24MP. How better to downsample to increase the sharpness if I think the original is soft? I'm sure this will reduce the maximum print size for a given dpi, but I'm wondering what is the best method of downsampling.

My intuition tells me that reducing an entire factor by using the surface mean is probably pretty good, but can I use more information to get even better results?

Can we use, for example, knowledge of raw pixel values ​​before decay?

android – How to prevent the Canon Selphy CP1300 from reframing my photos without border too large

My smartphone takes pictures with a different report than the Canon Selphy CP1300 (10×15 cm).

When I print the photo using the "Canon PRINT Inkjet / SELPHY" application using the default "Borderless" setting, the printer cuts the image vertically. When I set it as "Bordered", the printer adds a large border both horizontally and vertically!

How can I ask the printer to print the photo as large as possible without trimming it (ie with a zero height border and a minimal horizontal border)?

pd: if possible, without using photo editing software to add a fictional horizontal border in order to get the same report as the printer.