Navalny is pictured with his family in the photo, which was posted on his Instagram account on Tuesday.
In his first direct message after the hospitalization, the anti-corruption activist said he was now breathing alone without medical support.
“Hello, this is Navalny,” he wrote in the caption. “I miss you. I still can hardly do anything, but yesterday I was able to breathe alone all day. Just myself. I did not use any outside help, not even the simplest valve in my throat.”
Navalny was poisoned with a chemical nerve agent from the Novichok group in the Soviet era, the German government said, and there are still questions about the Russian state’s involvement in the incident.
Despite this, the Kremlin critic intends to return to his homeland after recovering, his press secretary Kira Yarmysh told CNN in a text message on Monday.
“No other option was ever considered,” Yarmysh said.
Navalny first fell ill on a flight to Moscow from the Siberian city of Tomsk on 20 August. He was admitted to hospital in the city of Omsk after an emergency landing.
He was then flown to Berlin’s Charite Hospital two days later in a medical evacuation and has been in Germany for several weeks while being weaned from mechanical ventilation.
On Monday, the hospital said Navalny was able to leave his bed for short periods.
International unrest remains
The attack on the Kremlin critic has been met with widespread international condemnation.
The German government found out he had been poisoned with a Novichok nerve agent after testing, a conclusion supported by two other laboratories in France and Sweden.
Novichok was also used in an attack in March 2018 on former Russian spy Sergei Skripal in the English city of Salisbury, and several Russian dissidents have been poisoned in the past.
Berlin has called on Moscow to explain how Navalny was poisoned, but the Kremlin has defied criticism.
Russian President Vladimir Putin called the allegations of the Kremlin’s involvement in the attack “unfounded” and “inappropriate” on Monday during a call with French President Emmanuel Macron.
“[The two sides] has discussed in detail the situation surrounding the ‘Navalny case’, according to the Kremlin’s report on Monday’s call.
“Vladimir Putin stressed the inappropriate nature of unfounded allegations against the Russian side in this context.”
The French reading of the call said Macron had stressed to Putin, “that all light must be immediately shed on the circumstances and responsibility for this assassination attempt.”